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kow [346]
3 years ago
13

Which statement is FALSE about the motor neuron to muscle activation sequence? You Answered Glutamate binds to glutamate recepto

rs on the cell body of the lower motor neuron. Acetylcholinesterase clears the neuromuscular junction of acetylcholine for normal muscle function. The activation sequence can only occur in one direction. Correct Answer Once initiated, an action potential is propagated the entire distance from the upper motor neuron to the muscle cell.
Biology
1 answer:
zheka24 [161]3 years ago
3 0

Answer:

Once initiated, an action potential is propagated the entire distance from the upper motor neuron to the muscle cell.

Explanation:

A motor neuron is a neuron which transmits the electrical signals from the CNS to the effector muscle. The motor neuron transmits the signals in the form of neurotransmitters at synapse like the Glutamate, acetylcholine.

The direction of the impulse transmission is unidirectional but the impulse is not transmitted or propagated the entire distance from the upper neuron to muscle but involves many neurons where the signals when reaches the terminal transfers the signals to the next neuron only when the neurotransmitter released is to the excitatory level.

Thus, the selected option is correct.

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This condition is also known as nearsightedness:
Contact [7]

Answer:

The correct answer is B. Myopia is also known as nearsightedness.

Explanation:

Myopia is a refractive defect of the eye in which parallel light rays converge at a focal point located in front of the retina, instead of converging on the same retina; it is the inverse defect to farsightedness, in which the light rays reach the retina before converging.

A person with myopia has difficulty focusing well on distant objects, which causes visual acuity deficits and can also lead to headaches, strabismus, visual discomfort and eye irritation.

4 0
3 years ago
In what ways are autorhythmic fibers similar to and different from contractile fibers?
Leto [7]
I think Autorhythmic fibers are fibers that are self excitable or on their own for example some cardiac muscle. They  repeatedly generate action potentials that trigger heart contractions.They continue to stimulate a heart to beat even when it is removed from the body. In comparison to contractile fibers, autorhythmic fibers are self excitable and do not require nervous system stimulation to trigger contractions. Contractile fibers have stable resting membrane potentials of -90mV, when a contractile fibers reaches threshold by action potential, the voltage gated fast sodium ions channels will open. 
5 0
3 years ago
State TWO reasons why it is important to control the amount of body fat in the human body
Fynjy0 [20]

Answer:

To maintain the right body temperature, it is essential to have adequate body fat. Body fats are the storehouses of energy in the body. Body fats are necessary to ensure the smooth functioning of cells. Body fats have a cushioning effect on organs and tissues.

8 0
2 years ago
According to scientists which type of organism formed by endosymbiosis?
nata0808 [166]
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3 0
3 years ago
A ____________ force is a force that one object applies to another object without touching it.
nirvana33 [79]

Answer:

Gravity?

Explanation:

Or it could be a non contact force.

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