Muscle and Skin (5/14) Flashcards
1
Q
Voluntary
A
we have control over
somatic branch
2
Q
Involuntary
A
cannot control
sympathetic and parasympathetic
3
Q
Fascile
A
bundle of muscle finers
4
Q
muscle cells
A
myocytes
5
Q
myofibril
A
smaller than myocytes
6
Q
Sarcomeres
A
made up of myofilaments which are composed of myosin and actin
7
Q
Muscle anatomy
A
sarcoplasm
sacrolemma
sarcoplasmic reticulum (stores calcium)
sarcomere
8
Q
Skeletal muscle
A
voluntary, somatic, striated due to sarcomeres, multinucleated
9
Q
Skeletal muscle subtypes
A
slow-twich fibers (red)
fast-twich fibers (white) -less myoglobin and mitochondria, rely on anaerobic metabolism
10
Q
Smooth muscle
A
involuntary (autonomic NS) parasympathetic sympathetic non-striated (no sarcomeres) uninucleate EX) blood vessel, peristalsis, veins, bladder, uterus
11
Q
Cardiac muscle
A
makes up the heart uninucleate involuntary control striated contract synchronously through intercalated discs myogenic activity (SA node)
12
Q
Muscle contractin
A
sarcomere
smooth muscle still contains actin and myosin
13
Q
Sliding filament theory
A
actin and myosin contract
14
Q
H zone
A
thick filaments
15
Q
i band
A
thin filaments
