Which parts of atoms can interact (react) to form chemical bonds?
What will be an ideal response?
valence electrons
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Which of the following movements is a good example of flexion?
A) opening the mouth B) turning the hand palm upward C) extreme bending of the head backwards D) bending the elbow E) spreading the fingers
A friend of yours suffers a blow to the forehead and loses sensation in her scalp due to the crushing of peripheral nerves. Is there a possibility she will regain sensation in the area?
A. Yes, because satellite cells undergo mitosis and produce growth factors that enable damaged axons to regenerate. B. No, because peripheral nerves lack an endoneurium and a neurilemma. C. Yes, because damaged peripheral axons may regenerate due to the presence of a neurilemma and an endoneurium. D. No, because damaged neurons have very limited potential for mitosis. E. Yes, because the damaged neurons may regenerate through the process of mitosis.
Why is there partial relaxation in graph (c)?
A) Calcium ion release is slow.
B) The muscle is starting to fatigue.
C) Stimulation intensity is fluctuating.
D) ATP reserves are cycling.
E) Nerve stimulation frequency is below maximum.
Exophthalmic goiter is a characteristic of
A. Graves' disease. B. myxedema. C. acromegaly. D. congenital hypothyroidism.