In a neuromuscular junction, the effect of acetylcholine (ACh) binding to receptors on the motor end plate lasts only briefly due to
a) rapid uptake of the ACh into the myofiber.
b) endocytosis of the ACh receptor into the myofiber.
c) rapid destruction of ACh in the synaptic cleft by acetylcholinesterase.
d) rapid destruction of ACh in the synaptic cleft by monoamine oxidase.
e) diffusion of the ACh out of the synaptic cleft.
c
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Structure B is the
A) epiphysis.
B) diaphysis.
C) endosteum.
D) periosteum.
E) metaphysis.
What is the substance in tea that binds iron, reducing the amount absorbed?
A) Tannic acid B) Ascorbic acid C) Caffeine D) Folic acid
The greatest increase in entropy occurs ________.
when starch is degraded to glucose when amylase produces maltose when glucose is converted to galactose when ATP is synthesized
The right lymphatic duct drains ________
A) the right side of the head and thorax, and the right upper extremity B) the right side of the body C) the right side of the head and thorax, the entire abdomen, the right upper extremity, and both lower extremities D) the head, thorax, and right upper extremity