Muscle Physiology ML1

Question 1

4 characteristics of skeletal muscle

Answer 1

uses atp, striated, voluntary, needs increase of calcium

Question 2

4 characteristics of cardiac muscle

Answer 2

uses atp, involuntary, striated, requires increase calcium

Question 3

3 characteristics of smooth muscle

Answer 3

uses atp, involuntary, increase calcium

Question 4

Top bottom structure to skeletal muscle

Answer 4

whole skeletal muscle, muscle fiber, myofibrils, thick and thin filaments, myosin and actin molecules

Question 5

What does every myosin molecule have?

Answer 5

long heavy chain segment that forms the core filament and 2 globular heads

Question 6

Sarcomere

Answer 6

one unit of repeating thin and thick filaments

Question 7

Z disc/band

Answer 7

where actin in anchored to the sarcomere, seperates sarcomeres

Question 8

I Band

Answer 8

light band, only thin filaments (actin)

Question 9

A band

Answer 9

dark band, overlap of thick and thin filaments

Question 10

H zone

Answer 10

center of the sarcomere where this is no filament overlap, only thick filaments (myosin)

Question 11

M line

Answer 11

supporting proteins that hold thick filaments together in the H zone, middle of the dark filaments

Question 12

Sarcolemma

Answer 12

plasma membrane: has ecf inside