2. Muscle Flashcards
What type of muscle fiber has high myoglobin, low glycogen and abundant mitochondria?
Type I
What is the term that is applied to an increased number of muscle (or other tissue) cells?
Hyperplasia
What is the name of the prominent striations in cardiac muscle?
Intercalated discs
Conduction of impulses in the cardiac muscle is the responsibility of specialized cardiac muscle fibers called?
Purkinje fibers
The thin filament in muscle fibers is known as what?
Actin
The connective tissue lining which surrounds an entire muscle is called this?
Epimysium
The thick fiber in muscle fibers is what?
Myosin
What is the name of the connective tissue layer that surrounds individual fasicles?
Perimysium
The light band in striated muscle is called what?
I band
What kind of muscle has a centrally located, large, squareish nucleus?
Cardiac
What is the connective tissue layer that surrounds individual muscle fibers?
Endomysium
The dark band in striated muscle is called what?
A band
The dark line in the centre of the H zone is known as what?
M line
What type of muscle fiber is also known as SLOW twitch fibers?
Type I
What is the endoplasmic reticulum called in muscle?
sarcoplasmic reticulum
What cells are capable of differentiating into muscle cells after an injury?
Satellite cells
During muscle contraction, which bands in skeletal muscle shorten?
I bands
The term applied to increased size of muscle (or other tissue) is?
Hypertropy
What is another name for skeletal muscle?
Voluntary
A unit of contraction which extends from one z line to another z line is called?
Sarcomere
What does the letter I stand for in the I band of skeletal muscle?
Isotropic
The pale area in the centre of the A band is called what?
H zone
What type of muscle fiber is known as FAST twitch?
Type II
What type of muscle has low myoglobin, high glycogen and few mitochondria?
Type II
What kind of muscle has numerous, peripheral nuclei?
Skeletal muscle
During muscle contraction, which bands in skeletal muscle remain constant in length?
A bands
What type of muscle will not repair itself?
Cardiac
What type of muscle is always capable of mitosis?
Smooth muscle
The kind of nucleus that has a single, central, elongated nucleus is what?
Smooth
4 basic properties of contractile cells
- excitability
- conductivity
- contractility (shorten)
- elasticity (return to original shape)
Largest group of contractile cells?
Muscle cells
Another word for muscle cells
Muscle fibers
