Answer:
A- Acetylcholine is released by axon terminals of the motor neuron.
Explanation:
The general mechanism of muscle contraction can be explained as follows:
a) The action potential which is generated, travels along the motor nerve to its ends on muscle fiber (or motor end plate) at the neuro-muscular junction.
b) The nerve endings then secrete small amounts of neurotransmitter called acetylcholine.
c) The actylecholine binds to the receptors on the membrane of muscle fiber and opens the voltage gated sodium channels.
d) Opening of these channels leads to flow of large quantities of sodium ions into the muscle fiber which ultimately results in initiation of action potential in muscle fiber.
e) This action potential depolarizes the fiber including the T-tubules, triggering the release of calcium ions from sarcoplasmic reticulum.
f) The calcium ions thus released initiated the process of muscle contraction.
Answer:
A
Explanation:
Inattentional blindness simply refer to failure to see objects staring at our faces or directly facing us, when our mind is focused directly on another object.Thus because Preet's attention was watching for the cars, her attention was diverted with her gave on the cars that she was oblivious of the two menshe bumped into. This is an example of Intentional blindness.
it may be caused by how attractive or conspicuous the object at focus is,if ths object is attracive the person will be oblivious of other objects around.
the degree of expectation of the individual focusing on the object,How expectant the person is to see the objects will catch the attention why negating others.
The extent of concentration of the individual to focus on the object that is the amount of mental work load on the brain during focus, will make the particular stimulus to gain attention of the brain , neglecting others.
The answer is A. <span>much more; much shorter than
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Torpor is a short sleep that aims to conserve energy of the animal. In torpor state, the animal will have much lower temperature because the metabolic rate is decreased. Hibernation basically a multiple and longer torpor. The animal will be easier to wake in torpor than hibernation.
exocytosis is the process whereby molecules in vesicles are exported out of a cell
