Muscle

Question 1

What are the 3 types of muscles

Answer 1

skeletal, cardiac, and smooth

Question 2

This muscle is associated with the skeleton. It is also striated and voluntary

Answer 2

skeletal muscle

Question 3

This muscle occurs in the wall of the heart. It is also striated and involuntary

Answer 3

cardiac muscle

Question 4

This muscle is found in hollow organs and tubes. It is also nonstriated and involuntary

Answer 4

smooth muscle

Question 5

The functional unit of contraction

Answer 5

sarcomere

Question 6

Separation between sarcomeres

Answer 6

Z line

Question 7

This is the plasma membrane that covers the fibers

Answer 7

sarcolemma

Question 8

Skeletal muscle fibers contain this

Answer 8

myofibrils

Question 9

What do thick filaments consist of?

Answer 9

myosin

Question 10

What do thin filaments consist of?

Answer 10

actin

Question 11

What are myofibrils made up of?

Answer 11

sarcomeres

Question 12

In a thick filament, what does each head consist of?

Answer 12

ATP and actin binding site

Question 13

What are the 2 regulatory proteins in thin filaments?

Answer 13

troponin and tropomyosin

Question 14

What are the 3 binding sites of troponin?

Answer 14

actin, calcium, and tropomyosin

Question 15

If calcium is absent, will myosin bind?

Answer 15

no

Question 16

What is the source for calcium to be used for muscle contraction?

Answer 16

sarcoplasmic reticulum

Question 17

Why are the T-tubules deep?

Answer 17

to allow calcium to travel down into the myofibril

Question 18

What kind of channel is the DHPR

Answer 18

voltage gated calcium channel

Question 19

What receptor releases calcium?

Answer 19

ryanodine receptor