Muscle Histology

Question 1

All types of muscle have _______ collagen

Answer 1

type IV

Question 2

Unique characteristic of cardiac muscle

Answer 2

intercalated disc

Question 3

smallest unit of skeletal muscle

Answer 3

fiber/cell

Question 4

myosin travels from the ______end to the _______

Answer 4

negative to positive

Question 5

Inhibit (inhibits binding to myosin)

Answer 5

Troponin I

Question 6

Ca2+ (binds Ca2+; striated muscle only)

Answer 6

Troponin C

Question 7

Tropomyosin (binds complex to tropomyosin)

Answer 7

Troponin T

Question 8

large molecule with a head and a tail that is bound by actin and ATP

Answer 8

myosin

Question 9

Decreases in length during muscle contraction

Answer 9

H band, I band , and sarcomere decease in length during contraction

Question 10

form a network around the Z disks

Answer 10

note that desmin, plectin, and αB-crystallin

Question 11

Slow/red muscle type

Answer 11

Type I

Uses aerobic metabolism; resistant to fatigue

Question 12

Fast oxidative muscle type

Answer 12

Type IIa

Question 13

Anaerobic fast glycolytic/white muscle type

Answer 13

Type IIb

Question 14

A drooping eyelid, is the most frequent early sign of_______ , a disease that produces extensive muscle weakness

Answer 14

myasthenia gravis

Question 15

muscle with no sarcomere

Answer 15

smooth muscle