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Elena L [17]
3 years ago
14

I need help please in biology if anybody can help me in quiz please write whattsapp number or Twitter

Biology
1 answer:
GalinKa [24]3 years ago
3 0

Answer:

Explanation:

Say the question I will help u out..

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How many phosphoester (phosphate ester) and phosphoanhydride bonds are in adenosine monophosphate (amp) and adenosine diphosphat
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The bond between CH2 and P of phosphate through O is called phosphoester bond. Only one such bond is present in both AMP and ADP.Link of phosphate groups through O by elimination of water molecule is called phosphoanhydride bond.In AMP, only single phosphate group present so no phosphoanhydride bond is present. But inADP, two phosphate groups are linked by one phospoanhydride bond.AMP  1  0ADP   1  1
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Place these events in the correct order of occurrence in the muscle contraction: End plate potential triggers an action potentia
Sunny_sXe [5.5K]

Answer:

1. Acetylcholine binds to receptors on the motor end plate

2. Ligand-gated channels open leading to depolarization

3. End plate potential triggers an action potential  

4. Transverse tubules convey action potentials into the interior of the muscle fiber

5. Calcium is released from the sarcoplasmic reticulum

6. Calcium ions bind to troponin, which then moves tropomyosin

Explanation:

Acetylcholine (ACh) is a signaling molecule (neurotransmitter) that binds to receptors on muscle cells. This binding triggers the opening of ligand-gated sodium channels, thereby ions enter into muscle cells, which causes the depolarization of the sarcolemma and thus promotes the release of Ca2+ ions from the sarcoplasmic reticulum. The myoneural junction, also known as the motor endplate, is the site of synaptic contact between a motor axon and a skeletal muscle fiber. The endplate potential is the voltage that produces the depolarization of muscle fibers when ACh molecules bind to their receptors in the cell membrane. This depolarization spreads in the sarcolemma through transverse tubules (T tubules​) and thus generates an action potential. Finally, this action potential induces the release of Ca2+ in the sarcoplasmic reticulum, which activates troponin protein and induces muscle contraction.

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3 years ago
when a person suffers a stroke, it is initially caused by damage to the___ a) circulatory system b) nervous system c)pulmonary s
Makovka662 [10]

Answer:

The correct answer would be a) circulatory system.

A stroke is primarily caused due to reduced or interrupted supply of blood to the brain.

The blood supply is usually reduced as a result of blockage or bursting of an artery carrying blood to the brain.

Consequently, the brain cells experience a lack of oxygen and nutrients due to which they begin to die.

Thus, stroke is initially caused by damage to the circulatory system.

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3 years ago
How did the volcano on the land<br> Form?
yarga [219]
Due to the shifting of the plutonic plates in the ground volcanos starting forming.
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3 years ago
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