Chapter 7.1: The Control of Movement

Question 1

After acetylcholine causes a flexor muscle to move your hand toward your shoulder, what would move it the other direction?

Answer 1

Acetylcholine causes the extensor muscle to contract

Question 2

What happened to a fish’s movement speed in colder water?

Answer 2

The fish swims at the same speed by recruiting more muscle fibers

Question 3

Which of the following is true of mammal’s slow-twitch muscle fibers?

Answer 3

Because they are aerobic, they do not fatigue rapidly

Question 4

Which of the following describes a stretch reflex?

Answer 4

The receptor detects that a muscle is stretched, and sends a signal to contract it reflexively

Question 5

A muscle spindle and a Golgi tendon organ are both described as what?

Answer 5

Proprioceptors

Question 6

What determines the rhythm of a cat’s scratching movements, or the wet dog shakes?

Answer 6

A set of neurons in the spinal cord