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Medical Physiology PHSL 1010 Exam 2 (solved & updated).
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Medical Physiology PHSL 1010 Exam 2 (solved & updated).
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Medical PhysiologyPHSL 1010: Exam 2
(solved & updated)
T-tubules (triads) - answer Depolarizing currents
pass to the sarcoplasmic reticulum via:
Troponin - answer The muscle protein that binds
to Ca++ during excitation-contraction coupling is:
One muscle cell only - answer A skeletal muscle
fiber comprises:
Slow-twitch fibers have more myoglobin than fast-
twitch AND Slow-twitch fibers are more fatigue-
resistant than fast-twitch - answer Fast-twitch
muscle fibers differ from slow-twitch fibers in
which way(s)?
Smooth muscle cells have only one nucleus AND
Smooth muscle contracts more slowly than skeletal
muscle - answer Smooth muscle differs from
skeletal muscle in which way(s)?
, Z lines (from striated [cardiac & skeletal] muscles)
- answer Smooth muscle dense bodies perform a
similar function to:
Inside sheets of smooth muscle - answer
Parasympathetic ganglia that aid in control of
smooth muscle contraction are located:
Ca++ enters the cell, Ca++ binds to calmodulin,
myosin heads are phosphorylated, myosin binds to
actin - answer The correct sequence of events in
smooth muscle contraction is:
Cardiac muscle cells have only one nucleus and are
branched - answer Cardiac muscle differs from
skeletal muscle in which way(s)?
Both serve as the insertion point for cardiac
muscle cells and contain numerous gap junctions
and desmosomes - answer Intercalated disks:
Is both limited by parasympathetic activity and is
similar to that seen in skeletal muscle - answer
Excitation-contraction coupling in cardiac muscle:
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