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Question: acetylcholine (ACh)
Choices:
neurotransmitter that binds at a motor end-plate to trigger depolarization
Question: aerobic respiration
Choices:
production of ATP in the presence of oxygen
Question: actin
Choices:
protein that makes up most of the thin myofilaments in a sarcomere muscle fiber
Question: cardiac muscle
Choices:
striated muscle found in the heart; joined to one another at intercalated discs and under the regulation of pacemaker cells, which contract as one unit to pump blood through the circulatory system. Cardiac muscle is under involuntary control.
Question: action potential
Choices:
change in voltage of a cell membrane in response to a stimulus that results in transmission of an electrical signal; unique to neurons and muscle fibers
Question: calmodulin
Choices:
regulatory protein that facilitates contraction in smooth muscles
Question: aponeurosis
Choices:
broad, tendon-like sheet of connective tissue that attaches a skeletal muscle to another skeletal muscle or to a bone
Question: autorhythmicity
Choices:
heart's ability to control its own contractions
Question: ATPase
Choices:
enzyme that hydrolyzes ATP to ADP
Question: atrophy
Choices:
loss of structural proteins from muscle fibers
Question: angiogenesis
Choices:
formation of blood capillary networks