Final: Exam 3 Questions and
Answers 100% Pass
Arrange the following list of biochemical events in the correct sequence:
1. An action potential is conducted deep into the muscle fiber by the T tubule.
2. calcium ions bind to actin
3. the membranes of the sarcoplasmic reticulum become more permeable to
calcium ions.
4. Calcium ions diffuse into the sarcoplasm around the myofibril.
5. the actin moves exposing active sites. - CORRECT ANSWER:-1 3 4 2 5
muscle tone - CORRECT ANSWER:-is a constant tension by muscles for long
periods of time
the space a chemical substance diffuses across from the presynaptic terminal of an
axon to the postsynaptic membrane of a muscle fiber is called - CORRECT
ANSWER:-synaptic cleft
acetylcholine binds to a membrane bound receptor and causes ligand-gated sodium
channels to open and results in - CORRECT ANSWER:-depolarization
, a concentric contraction is described as - CORRECT ANSWER:-a muscle
produces constant tension as it shortens
when an action potential reaches the presynaptic terminal, - CORRECT
ANSWER:-calcium ions diffuse into the presynaptic terminal through voltage-
gated ion channels
which type of respiration produces the most ATP molecules - CORRECT
ANSWER:-aerobic respiration
in smooth muscle, most of the calcium needed for muscle contraction -
CORRECT ANSWER:-enters from extracellular fluid
if the resting membrane potential becomes more negative, what has occurred -
CORRECT ANSWER:-hyperpolarization
which of the following is not an age related change in skeletal muscle
A. loss of muscle strength
B. loss of synapse surface area
C. loss of fast-twitch fibers
D. decreased recovery time
E. decrease in motor units - CORRECT ANSWER:-D. decreased recovery time
Answers 100% Pass
Arrange the following list of biochemical events in the correct sequence:
1. An action potential is conducted deep into the muscle fiber by the T tubule.
2. calcium ions bind to actin
3. the membranes of the sarcoplasmic reticulum become more permeable to
calcium ions.
4. Calcium ions diffuse into the sarcoplasm around the myofibril.
5. the actin moves exposing active sites. - CORRECT ANSWER:-1 3 4 2 5
muscle tone - CORRECT ANSWER:-is a constant tension by muscles for long
periods of time
the space a chemical substance diffuses across from the presynaptic terminal of an
axon to the postsynaptic membrane of a muscle fiber is called - CORRECT
ANSWER:-synaptic cleft
acetylcholine binds to a membrane bound receptor and causes ligand-gated sodium
channels to open and results in - CORRECT ANSWER:-depolarization
, a concentric contraction is described as - CORRECT ANSWER:-a muscle
produces constant tension as it shortens
when an action potential reaches the presynaptic terminal, - CORRECT
ANSWER:-calcium ions diffuse into the presynaptic terminal through voltage-
gated ion channels
which type of respiration produces the most ATP molecules - CORRECT
ANSWER:-aerobic respiration
in smooth muscle, most of the calcium needed for muscle contraction -
CORRECT ANSWER:-enters from extracellular fluid
if the resting membrane potential becomes more negative, what has occurred -
CORRECT ANSWER:-hyperpolarization
which of the following is not an age related change in skeletal muscle
A. loss of muscle strength
B. loss of synapse surface area
C. loss of fast-twitch fibers
D. decreased recovery time
E. decrease in motor units - CORRECT ANSWER:-D. decreased recovery time
