Muscle physiology - VPHY exam 2 questions with
verified answers already passed
1. somatic nervous
the division of the peripheral nervous system that controls the
sys- tem
body's skeletal muscles (controls voluntary movements)
2. 3 muscle types: 1. skeletal
2. cardiac
3. smooth
3. What do all 3 cell
types have in
common?: 5.
4. Skeletal muscle
func- tions:
,Muscle physiology - VPHY exam 2 questions with
verified answers already passed
Protein filaments slide to facial expressions, gestures
cause muscle contraction
(shortening) and
Intracellular [Ca2+] goes up to
trigger contraction
1. movement:
-create mvoement by contracting
-pull on tendions which are
connected to bones
2. support
-Muscles in abdominal wall
support visceral organs
-Shield tissue from injury
3. posture
-Muscles continuously contract to
hold the body still, maintaining
upright sitting/standing position
4. temperature regulation
-Skeletal muscle is 40% of our
body mass
-It has a disproportionate ettect on
body temp
5. communication
-Facilitates all modes of
interpersonal communication,
e.g. speaking, typing, writing,
,Muscle physiology - VPHY exam 2 questions with
verified answers already passed
Neuromuscular junc- specialized synapse between the somatic (alpha) motor neuron's
tion (NMJ) nerve terminal and the motor end plate of the skeletal muscle
cell
small piece of the sarcolemma (contains the presynaptic nerve
terminal, motor end plate, synapse)
An action potential propagated by the motor neuron typically results
in an action potential across the muscle cell membrane
ACh is the NT used at all NMJS
6. Which receptor
does ACh always Nicotinic acetylcholine receptors (LGIC that causes an EPSP)
activate at the
NMJ?
7. What is always the depolarization
re- sponse of the
postsy- naptic cell?
8. motor end plate has cell curface receptors (nicotinic receptors/LGIC) that bind to
the ACh
and cause and EPSP
This EPSP provides the threshold depolarization that activates
the VGICS on the sarcolemma (theyre expressed all the way
throughout even down the T-tubules --> this is what allows for
an AP to make its way from the NMJ down to the t-tubules to
do E/C coupling)
, Muscle physiology - VPHY exam 2 questions with
verified answers already passed
9. sarcolemma the cell membrane surrounding a skeletal muslce cell
T-tubules invaginate the myofibrils
verified answers already passed
1. somatic nervous
the division of the peripheral nervous system that controls the
sys- tem
body's skeletal muscles (controls voluntary movements)
2. 3 muscle types: 1. skeletal
2. cardiac
3. smooth
3. What do all 3 cell
types have in
common?: 5.
4. Skeletal muscle
func- tions:
,Muscle physiology - VPHY exam 2 questions with
verified answers already passed
Protein filaments slide to facial expressions, gestures
cause muscle contraction
(shortening) and
Intracellular [Ca2+] goes up to
trigger contraction
1. movement:
-create mvoement by contracting
-pull on tendions which are
connected to bones
2. support
-Muscles in abdominal wall
support visceral organs
-Shield tissue from injury
3. posture
-Muscles continuously contract to
hold the body still, maintaining
upright sitting/standing position
4. temperature regulation
-Skeletal muscle is 40% of our
body mass
-It has a disproportionate ettect on
body temp
5. communication
-Facilitates all modes of
interpersonal communication,
e.g. speaking, typing, writing,
,Muscle physiology - VPHY exam 2 questions with
verified answers already passed
Neuromuscular junc- specialized synapse between the somatic (alpha) motor neuron's
tion (NMJ) nerve terminal and the motor end plate of the skeletal muscle
cell
small piece of the sarcolemma (contains the presynaptic nerve
terminal, motor end plate, synapse)
An action potential propagated by the motor neuron typically results
in an action potential across the muscle cell membrane
ACh is the NT used at all NMJS
6. Which receptor
does ACh always Nicotinic acetylcholine receptors (LGIC that causes an EPSP)
activate at the
NMJ?
7. What is always the depolarization
re- sponse of the
postsy- naptic cell?
8. motor end plate has cell curface receptors (nicotinic receptors/LGIC) that bind to
the ACh
and cause and EPSP
This EPSP provides the threshold depolarization that activates
the VGICS on the sarcolemma (theyre expressed all the way
throughout even down the T-tubules --> this is what allows for
an AP to make its way from the NMJ down to the t-tubules to
do E/C coupling)
, Muscle physiology - VPHY exam 2 questions with
verified answers already passed
9. sarcolemma the cell membrane surrounding a skeletal muslce cell
T-tubules invaginate the myofibrils
