Answer:
The action of the neurotransmitter acetylcholine, released by the vagus nerve in the heart, slows the heart rate and weakens the force of contraction. The skeletal muscle has the ability to perceive a stimulus and respond to it. As regards skeletal muscles, the stimulus is chemical in nature: acetylcholine released by the motor nerve ending. The response of the muscle fiber is the production and propagation along its membrane of an electrical current (action potential) that causes muscle contraction.
Explanation:
Acetylcholine is one of the most abundant neurotransmitters in the central and peripheral nervous system. Acetylcholine receptors are nicotinic (ionotropic) and muscarinic (metabotropic GPCR). In skeletal muscle of adults, acetylcholine binds to the alpha subunit of the nicotinic channel, which are two of the five subunits that make up the pore of this channel. Acetylcholine released by the nerve ending binds to the receptor in the sarcolemma and triggers an electrical current - the action potential. This spreads along the sarcolemma and causes a signal to pass from the T tubule to the sarcoplasmic reticulum in the triad, which then releases calcium ions (Ca ++). Once the calcium ions are released, by diffusing between the actin and myosin protein filaments, they cause the myofibrils to contract. On the other hand, in cardiac and smooth muscle cells, acetylcholine binds to 7M proteins, which do not function as channels, but are typical members of the GPCR class A superfamily. One of the physiological mechanisms of acetylcholine is the regulation of the heart rate, through the mobilization limited to the inner face of the plasma membrane of the dimer bg of protein G. This dimer transduces the specific binding of the ligand with its receptor in the plane of the membrane, thanks to its proximity with the ion channel or with enzymes bound to the plasma membrane. This can be done because its g subunit remains attached to the inner face of the membrane.
What best explains why the ash trees are being cut down?
To try and kill all the emerald ash borers. describe what an organism's niche is. Niche is what an organism's role is in the environment is best explanation why the ash trees are being cut down.
What about ash trees?Baseball bats, tool handles, furniture, and flooring can all be made from ash wood, but once the ash borer has invaded it, it is useless and expensive to remove.The Emerald Ash Borer (EAB) is a pest that kills ash trees ruthlessly in the eastern United States and is now moving westward. Millions of dead or dying ash trees have to be removed by homeowners because of this insect, and many people still have to decide how to handle infestations.According to USDA studies, an ash tree that has lost more than half of its leaves due to EAB should probably be cut down. The majority of a tree's canopy, though, might make it a strong candidate for treatment.Trees are cut down so that their wood can be burned or utilized to create items like paper, furniture, and structures. Large tracts of trees are cut down to provide room for crops to be grown or for areas for farm animals to graze.Learn more about ash tree here:
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What is the function of tRNA in protein synthesis ?
A. To combine with other proteins to form the ribosome where protein synthesis takes place
B. To match up codons with rRNA to signal the start of protein synthesis
C. To transfer the amino acids from the cytoplasm to the ribosome where protein synthesis takes place
Answer:
C.
Explanation:
tRNA transfers the amino acids to the ribosome, where protein synthesis occurs. In addition, the "t" in tRNA stands for transfer. Hope this helps
What do we call Earth's orbit around the Sun?
intergalactic movement
Earth's revolution
Earth's rotation
galactic movement
Answer:
Earth's revolution
How do we know that the earth orbits the sun?If you study the stars and know where all the planets on the solar system are, you will notice that those stars alternate their motion in the sky, which means they do not orbit the Earth. In fact, the word "planet" originally means tricky star, suggesting that those "stars" did not behave like other normal stars.
The theory of universal gravity cannot be denied, since we are able to send satellites to outer space and have them orbit our plant. In fact, we are able to derive equations to figure out how fast the satellite need to orbit around the earth in relation to how high above the surface of the earth it is. The same mathematics that derived said information had also been used to derive the geosynchronous height from the Earth, which is the height at which a satellite orbiting the Earth, with the necessary speed to stay in circular orbit (not elliptical orbit), matches the Earth's rotation about its axis. Geosynchronous satellites are used for T.V. broadcasting and many other applications.
The formula for universal gravitation is GMm/r2, which means that the force of gravity on an object by another object are proportional to the masses of both objects, and inversely proportional to the square of the distance between them, and this proportion is multiplied by a constant G. It makes greater sense that the Earth revolves around the Sun, and not the other way around, because the mass of the Earth is way too small to apply a force strong enough to create a large enough acceleration on the sun to keep it in orbit around the Earth. If the Earth had enough mass to cause that huge of a gravitational force, then the moon will not remain in orbit around the Earth, but will fall closer the Earth and hit the Earth.
What is the revolution of a planet?The process through which a planet, let's say the earth, revolves around a huge mass that is significantly larger than the planet, such as the sun or any star. And the gravity between the two bodies is what causes this process to occur.
look at the picture
I will leave your question unanswered. Thanks for the points I stole from you!
The rate of cellular respiration and photosynthesis can increase or decrease because of different factors.
Explain how either the rate of cellular respiration or the rate of photosynthesis can be increased and decreased. Be sure to include details of specific reactions in your answer.
The main environmental factors that affect photosynthesis are: light, CO2 and temperature. Also, the availability of water and nutrients are important factors.
How to increase the rate of photosynthesis?Plants kept under ideal conditions of luminosity and carbon dioxide concentration increase the rate of photosynthesis as the ambient temperature increases, up to close to 40°C. Above this temperature limit, there will be a drastic reduction not only in photosynthesis, but also in most vital reactions.
The photosynthetic rate, that is, the intensity of photosynthesis that the plant performs, can be changed by the amount of light it receives. The greater this light radiation, the greater the photosynthetic rate, if there is no other factor such as temperature or water availability limiting the process.
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If gametes were diploid like somatic cells, how many chromosomes would the zygote contain?.
If the gamete were diploid like somatic cell, zygotes would contain twice of diploid number of chromosomes.
what is zygote?A zygote is a type of eukaryotic cell created when two gametes fertilize one another.
An organism's reproductive cells are called gametes.
They are additionally known as sex cells.
Male gametes are referred to as sperm, whereas female gametes are known as ova or egg cells.
During fertilization both male and female gametes are fused to form zygote. chromosome of both gametes are fused in zygote.
If gametes have diploid number of chromosome then zygote would have twice of diploid number of chromosomes that is chromosome number of two gametes.
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what property of DNA makes it possible for a probe to find a single-stranded DNA target gene?
Answer:
base pairing property
Explanation:
every dna/rna base, a c g t and u, has only one possible pairing partner, so if the strand is open on one side (single strand), the opposite side can be inferred because only one sequence will match the existing strand's base sequence. the property is usually called base pairing property
A farmer stopped maintaining a field that was once used to grow crops. Over time, the field eventually became a forest. These changes best illustrate the process of
These changes best illustrate the process of plants.
The kingdom Plantae contains eukaryotes that are mostly photosynthetic. Algae and fungi were once included in the plant kingdom, which historically included all other living creatures save animals. However, prokaryotes, fungi, and some types of algae are not included in any modern definitions of the Plantae.
Plants are essential to the ecology because they help with the nitrogen cycle, prevent soil erosion, and participate in the water cycle. Although they also create oxygen, plants are a significant source of food. For humans to exist, it is essential that plants flourish.
One of the simplest methods to enhance the environment and enhance your surroundings is to plant a tree. Plants help to prevent soil erosion by filtering contaminants, absorbing carbon dioxide, and releasing oxygen. It will also assist to lessen your carbon footprint if you plant a few trees.
hence, The farmer ceased preserving the land because plants grew over time.
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Most fossil fuel companies lobby heavily for laws that make it difficult to develop renewable energy sources or that stop research on the harmful effects of fossil fuels. How could this affect future generations?
A. It will create a more competitive market, leading to lower profits for everyone.
B. It will prevent future generations from losing money on profitless ideas like renewable energy.
C. We will not be ready when fossil fuels run out and, as they disappear, those in poverty will lose access to things like heating and fuel for vehicles.
D. The companies will share all the money they are making, so future generations won’t have financial issues.
We will not be ready when fossil fuels run out and, as they disappear, those in poverty will lose access to things like heating and fuel for vehicles is how they will be affected and is denoted as option C.
What is Fossil fuel?This is a hydrocarbon which is present naturally in the earth crust and examples include coal, crude oil etc.
When constant extraction is done, they will run out thereby making fuels for vehicles etc scarce and inaccessible.
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What theories did Isaac Newton use to describe the motion of the planets? Select all that apply.
periodic motion
laws of motion
law of ellipses
gravity
Answer: Newton developed a mathematical formulation of gravity that explained both the motion of a falling apple and that of the planets. He showed that the gravitational force between any two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Explanation:
Answer: laws of motion, gravity
Explanation:
They were the only theories that were his.
Sir Isaac Newton, an English mathematician and physicist, developed three laws of motion that helped explain why the planets move the way they do. He also developed the first widely accepted theory of gravity, which also explained why objects in the solar system move the way that they do.
Which two seasons is Earth experiencing at positions "A" and "C" in its orbit around the Sun?
winter and summer
spring and summer
spring and autumn
winter and autumin
Answer: Spring and autum
Explanation: got it right on my test
The measure of how stretched out an ellipse is, is referred to as ____.
A. Gravity
B. Weight
C. Mass
D. Eccentricity
D. The measure of how stretched out an ellipse is, is referred to as eccentricity.
What is eccentricity of ellipse?
Eccentricity for an ellipse is the ratio of the length of the semimajor axis (a) to the distance (c )between the ellipse's center and each focus.
e = c/a
The greatest ellipse has the smallest eccentricity, whereas the perfect circle has the maximum eccentricity. The eccentricity of an ellipse e, which ranges from 0 (the limiting case of a circle) to 1 (the length of the ellipse), is used to determine how long it is (the limiting case of infinite elongation, no longer an ellipse but a parabola). Because the distance from the fixed point on the plane has a constant ratio that is less than the distance from the fixed line on the plane, the eccentricity of an ellipse ranges from 0 to 1.
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Propose a hypothesis in an attempt to find explanations for this curiosioty
I will leave your question unanswered. Thanks.
If the DNA sequence is CCAATTGA, what is the compliment? I need this fast
Answer: GGTTAACT
Explanation:
What do you understand by the term cell diversity
Answer:
cell type diversity refers to range of different cells types that comprise a tissue organisms cell type diversity during the diploma of the nervous system as a result of act of the cell instructing and extractic factors controlling sulphate determination hope the answer will be helpful for
During the spring and fall each year thousands of maple trees are tapped for their fluids in order to make “real” maple syrup. If you were to tap into a maple tree to extract the The syrup (sucrose)which tissue Would you want to tap into
Answer: The phloem tissue layer
Explanation: The phloem tissue of a plant is one of the vascular tissues of higher plants responsible for the conduction or transportation of photo-synthetically manufactured food (usually in the form of sugar) round the body of the plant to the various tissues and organs that require it.
The tissue moves food materials from their source of manufacture, usually the leaf, to other parts of the plant. Hence, in order to extract the syrup from the maple tree, the phloem layer must be tapped into.
The questions are on the photo and they must be met
Answer:
it is not clear visible to answer it
What is an equinox? Select all that apply.
the day in Earth's orbit when sunlight and darkness are of equal lengths
the day in Earth's orbit when sunlight is longer than darkness
the day in Earth's orbit that marks the beginning of spring or autumn
the day in Earth's orbit that marks the beginning of summer or winter
Answer:
The day in Earth's orbit when sunlight and darkness are of equal lengths
The day in Earth's orbit that marks the beginning of spring or autumn
Explanation:
In a muscle cell, Blank (Answer options) sarcoplasmic reticulum, T Tubules, Myofibris, Actin, and myosin filaments contain Blank(Answer Options) T Tubules, fascia, sarcomeres, myofibrils.
Please Help
In a muscle cell, myofibrils contain what is referred to as sarcomeres.
What are Myofibrils?These are protein filaments which are responsible for contraction and relaxation in muscle cells.
They contain structures known as sarcomeres which are linked in series hence the reason why it is the most appropriate choice.
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.
Explain whether drivers should be subject to a usage tax if their vehicles contribute more emissions
to the atmosphere.
The purpose of a carbon tax is to remember the true cost of burning carbon. Those costs are paid by those who suffer from the effects, such as homeowners, farmers, and ultimately the government.
Carbon taxes make sure businesses and consumers pay for the external charges they inflict on society.
How might tax be used to reduce emissions?Under a carbon tax, the government sets a price that emitters must pay for each ton of conservatory gas emissions they emit.
Companies and consumers will take steps, such as switching fuels or adopting new technologies, to lower their emissions to avoid paying the tax.
What should you do when more CO emission from vehicles?Drive Less
Hike or bike when you can.Use the bike-share schedules if your city or town has them.Take public transit when attainable.Carpool with friends rather of driving alone.Use ride-sharing assistance.To learn more about carbon tax, refer
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In horses, gray horses (GG) are codominant to white
horses (WW). The heterozygous horses (GW) is an
Appaloosa horse (a white horse with gray spots on
the rump and loins). Cross a white horse with an
appaloosa horse. For the following, construct a
Punnett square and give the genotypic and
phenotypic ratios of the offspring. {Hint: The first
parent genotype needs to go down the left side of
the Punnet square, and the second parent
genotype needs to go across the top of the Punnett
square.
Genotypic ratio = 50% WW, 50% GW
Phenotypic ratios = 50% white, 50% appaloosa
Monohybrid crossWhite horse genotype = WW
Appaloosa genotype = GW
WW x GW
GW WW GW WW
Genotype ratio = 50% WW, 50% GW
Phenotype ratio = 50% white, 50% appaloosa
See the attached image for the Punnet's square.
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What may occur when convergent boundaries interact?
O formation of island chains
O creation of mid-ocean ridges
O creation of convection currents
O formation of rift valleys
Formation of island chains occurs when convergent boundaries interact and is denoted as option A.
What is Convergent boundary?This refers to an area where two or more lithospheric plates collide in the earth.
When the y interact, island chains are formed which consists of sea with sparse islands around the area.
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Answer: A
Explanation: E2022
1 Explain why animals depend on plants to keep them alive.
2 Describe how carbon dioxide and water reach the chloroplasts in leaves.
3 Describe two pieces of evidence that show that plants cannot make their own food without light.
4 Starch tests show where photosynthesis has taken place. What can you conclude using the evidence from test 1?.
à5 What does the evidence from test 3 show?
1. Animals depend on plants to keep them alive is Plants are producers they take energy from the sun, nutrients from the earth, and water to grow and have their flowers, seeds, and berries.
They also release oxygen, which all animals, including humans, need to stay. Animals are consumers and they all depend on plants for survival.
2. carbon dioxide and water reach the chloroplasts in leaves is Basically the roots consume the water and transports it up the xylem, which gets it to the leaves. Carbon dioxide contacts the chloroplasts in the leaves via a stomata
3. Two pieces of evidence that show that plants cannot make their own food without light. When plants lack light, they don't deliver chlorophyll (the green pigment in plants), and plants can turn pale green to yellow to white. Plant stems become “leggy,” meaning stems become long and thin and appear to be advancing toward the source of light.
The photosynthesis is the only method for synthesizing food. It is commonly believed that about 717.6Kcal energy is required to prepare just 10g of glucose. No energy input no metabolism and therefore no food.How are leaves tested for starch?The existence of starch in leaves can be tested by the Iodine test. When we remove chlorophyll from the leaf by cooking it in alcohol and then placing two drops of iodine solution, it is a color change to blue indicates the existence of starch.
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How we save water during watering plants
Answer:
1. Don't water plants if it's raining.
2. Be careful not to use too much water or spill.
Explanation:
Brainliest, please :)
ANSWER QUICK WILL GIVE BRAINLY
Which of the following describes a way to reuse items instead of throwing them away?
Use up a product completely.
Donate old clothes and items.
Buy items that won't break easily.
Compost food instead of throwing it away.
Which statement describes a process associated with meiosis?
Answer:
B. Haploid cells join to form an organism that has a complete set of chromosomes.
Explanation:
The answer is B because a haploid cell from each parents makes a diploid cell which has a complete set of chromosomes, 23 from each parent!
Problem: Multiple Alleles
Show the cross between a mother who has type O blood and a father who has type AB blood.
GENOTYPES:
- list
PHENOTYPES:
- list
Answer:
PHENOTYPE OF MOTHER -O BLOOD GROUP
GENOTYPE OF MOTHER -i/i
PHENOTYPE OF FATHER: AB BLOOD GROUP
GENOTYPE OF FATHER: A/B
THE OFFSPINGS WILL HAVE BLOOD GROUP EITHER A OR B .
THE PHENOTYPES OF OFFSPRINGS WILL BE EITHER A OR B .
THE GENOTYPES OF THE OFFSPRINGS WILL BE EITHER A/i FOR BLOOD GROUP A AND B/i FOR BLOOD GROUP B.
Explanation:
WHAT IS MULTIPLE ALLELES?
GENES WHICH SHOWS MORE THAN TWO ALLELIC FORM ARE CALLED MULTIPLE ALLELES. ABO BLOOD GROUPING IS CONTROLLED BY MULTIPLE ALLELES.
CROSS
MOTHER × FATHER
PHENOTYPES O × AB
GENOTYPES i/i × A/B
GAMETES i A B
F1 GENERATION A/i B/i
(GENOTYPES)
PHENOTYPES A AND B BLOOD GROUPS
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In the lab, you will simulate birds with three different beaks.After watching the birds feed, you will remove fruit to stimulated a change in the environment. what question are you answering by doing this observation? Write it by filling in the blanks below.
What is the effect of…
Answer:
... removing fruit in the environment?
Explanation:
So, generally when talking about birds with different beaks, you're talking about Darwin's theory of evolution. Now, in his experiment, he observed what happened when different food sources were added or removed, and the result was evolution. The answer of the question would most likely be evolution, because of "survival of the fittest", but the question you are answering is most likely "What is the effect of removing fruit in the environment?"
Question 24 (6 points)
Type a persuasive message in the space provided based on the following scenario:
Your medical office has recently updated the company website. The new website
includes many tips and strategies for improving patient health. Some topics include:
information related to how to stop smoking, how to choose healthy snacks, and
walking 1000 steps a day. Your supervisor asks you to write a persuasive message in
the monthly patient newsletter encouraging patients to visit the website. Be sure to
include all of the details in your message.
The persuasive message based on the following scenario is that we want to encourage everyone to regularly check the freshly redesigned office website for advice and information on how to quit smoking and on enhancing your health and the health of those around you. All comments on the website are appreciated, and we hope you find the information to be interesting and informative.
Persuasive message: A compelling message is the main idea that engages, educates, persuades, or motivates. Discussions of persuasive communications frequently contrast reason with passion.
Every communication contains components of ethos, or authority; pathos, or enthusiasm and passion; and logos, or reason and logic.
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what is the masses, and volume of 50 centimeters and 25 grams
The density of the solid is 0.5. See the explanation for this below.
What is density?The measurement of how densely a substance is packed together is defined or denoted as density.
It is expressed as mass per unit volume.
Density (abbreviated D or ρ) is a mathematical concept.
ρ=m/V, where
ρ is the density, m is the object's mass, and V is the object's volume.Given the above, what is the density of the solid?From the above information:
ρ = 25/50ρ
ρ= 0.5
Why do you need to know the density of a solid?One of an object's most significant and practicable physical characteristics is density.
Densities are frequently used to distinguish between pure materials as well as to describe and infer the composition of various types of mixes.
Because it enables us to predict which compounds will float and which will sink when placed in a liquid, density is a crucial notion.
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Full Question:
If the mass of a solid is 25 g and it's volume is 50 cm3 what is it's density?