Amplification of a second-messenger cascade can take place at which level of a signal cascade?
A. One activated receptor can activate numerous G-proteins.
B. One activated G-protein can activate numerous effector enzymes.
C. One active effector enzyme can catalyze numerous reactions.
D. One activated protein kinase can allosterically modulate numerous proteins.
E. All of the choices are correct.
E
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A. involuntary, stabilize B. involuntary, continuously vary C. voluntary, stabilize D. voluntary, continuously vary
An eye wash station is an example of a safety device
Indicate whether the statement is true or false
What gives bone its compressional strength?
A. Inorganic salts B. Red bone marrow C. Reticular fibers D. Endosteum E. Yellow bone marrow
Most preganglionic fibers in the sympathetic nervous system synapse with ________.
A. no neurons B. 10-20 postganglionic neurons C. somatic neurons D. effectors directly E. parasympathetic neurons