When myosin cross-bridges bind to the active sites on actin,
A) ATP is hydrolyzed.
B) They pivot toward the M line.
C) The sarcomere strengthens.
D) Muscle relaxation occurs.
E) The I band moves closer to the Z line.
B) They pivot toward the M line.
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The endocrine gland located behind the stomach is the ________.
A. adrenal medulla B. adrenal cortex C. pancreas D. kidney
Interventricular foramen is a synonym for the cerebral aqueduct.
Answer the following statement true (T) or false (F)
Breathing faster and deeper eliminates more carbon dioxide from the body than normal breathing. Under these circumstances, in the lungs
A) more carbon dioxide will diffuse out of the blood.
B) more carbon dioxide will diffuse into the blood.
C) less carbon dioxide will diffuse out of the blood.
D) less carbon dioxide will diffuse into the blood.
E) the amount of carbon dioxide diffusion will remain unchanged.
What is ultimately the fate of fontanels in a child or an adult skull?
A) They do not change. B) They ossify, and in time become sutures. C) They become thinner fibrous regions between cranial bones.