MSK Physiology

Question 1

What filaments of the skeletal muscle contain myosin?

Answer 1

Thick filaments

Question 2

What filaments of the skeletal muscle contain actin, Troponin, Tropomyosin?

Answer 2

Thin filaments

Question 3

What are the 3 sites on Troponin?

Answer 3

Troponin C, T, and I

Question 4

Which site binds to Calcium ions?

Answer 4

Troponin C

Question 5

Which site binds to tropomyosin and prevents cross-bridge formation?

Answer 5

Troponin T

Question 6

Which site binds to actin and inhibits the interaction between actin and myosin?

Answer 6

Troponin I

Question 7

In relation to the sarcomere, which band is the dark band. that has both actin and myosin?

Answer 7

A band

Question 8

In relation to the sarcomere, which band only has thick filaments?

Answer 8

H Band

Question 9

In relation to the sarcomere, which band is the light band and only has thin filaments?

Answer 9

I band

Question 10

In relation to the sarcomere, which line bisects the H bands and serves as the attachment of myosin filaments?

Answer 10

M line

Question 11

Which band always remains the same length?

Answer 11

A band

Question 12

What does calcium bind to during a Smooth muscle contraction?

Answer 12

Calmodulin

Question 13

What motor reflex is a reflex from a painful stimulus transmitted along A-delta and C fibers in the dorsal root of the spinal nerve to an interneuron, to an alpha motor neuron stimulating a flexor muscle to withdraw the limb from the painful stimulus?

Answer 13

Flexor Withdrawal reflex