Module 5

Question 1

Muscle cells are called

Answer 1

Muscle fibers

Question 2

Sarcolemma

Answer 2

Cell membrane

Question 3

Sarcoplasm

Answer 3

Cytoplasm

Question 4

Sarcoplasmic reticulum

Answer 4

Endoplasmic reticulum

Question 5

Network of transverse tubules

Answer 5

T-tubules connected with the sarcolemma

Question 6

Myofibrils

Answer 6

The contractile structures

Question 7

Actin

Answer 7

Thin filament

Question 8

Myosin

Answer 8

Thick filament

Question 9

Accessory proteins

Answer 9

Troponin and tropomyosin

Question 10

What does the sarcoplasmic reticulum store?

Answer 10

Ca2+

Question 11

T-tubule brings

Answer 11

action potentials into interior of muscle fiber

Question 12

How many sarcomeres between two Z disks?

Answer 12

One

Question 13

H zone

Answer 13

is a clear band in the middle of the A band, heavy filaments only

Question 14

M line

Answer 14

represents the proteins to which heavy filaments attach

Question 15

A band

Answer 15

is made of darker regions where both light and heavy filaments only.

Question 16

Excitation

Answer 16

Synaptic transmission at the neuromuscular junction and sarcolemma depolarization

Question 17

Coupling

Answer 17

Release of intracellular calcium