Acetylcholine
a. binds to cholinergic receptors on preganglionic neurons and skeletal muscle cells
b. destroys acetylcholinesterase
c. binds to muscarinic receptors
d. is released from all postganglionic neurons
e. does all of the above except b
C
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In mice, the overexpression of a transcription factor PRDM16 results in an increase in BAT, which appears to be important
A) As an uncoupling protein. B) In decreasing mitochondrial respiration. C) In protection against metabolic dysfunctions, such as obesity. D) In ATP production.
The membrane of a cell is composed of a ________ bilayer.
Fill in the blank(s) with the appropriate word(s).
When you walk up the stairs, your hip and knee joints ________ to lift your body weight.
A. abduct B. flex C. adduct D. rotate E. extend
During intense exercise, fatigue of skeletal muscle occurs because of:
A. depletion of ATP within the skeletal muscle fiber B. Ca++ overload by mitochondria within the muscle fiber C. inhibition of actin-myosin interaction D. stimulation of Ca++ release the SR E. increased pH within the muscle fiber