Muscle Flashcards
1
Q
Troponin subunits
A
Troponin T
Troponin I
Troponin C
2
Q
Troponin-T
A
binds to tropomyosin
3
Q
Troponin-I
A
binds to actin and inhibits contraction
4
Q
Troponin-C
A
binds to calcium
5
Q
Key receptors in the flux of Ca2+ channels in the sarcoplasmic reticulim
A
Dihydropyridine (DHP)
Ryanodine (RyR)
6
Q
DHP
A
Voltage-gated Ca2+ channel located in the sarcolemmal membrane
DHP functions as a voltage-sensor, when the skeletal muscle is at rest, DHP blocks RyR
7
Q
RyR
A
is a calcium channel on the SR membrane
8
Q
SERCA
A
sarcoplasmic endoplasmic reticulum calcium ATPase
9
Q
Receptor to which acetylcholine binds
A
Nicotinic receptor
10
Q
Ways to increase muscle contraction
A
Summation & recruitment
11
Q
Function of titin
A
Allows elasticity in the muscle
12
Q
Mecanisms of cytosolic Ca2+ removal in myocytes
A
SERCA
Na+/Ca2+ exchanger
