exam 4 review

Question 1

Which sequence correctly lists the changes that allow the thick and thin filaments to slide past one another in skeletal muscle contraction?

Answer 1

Attach - pivot - detach - return

Question 2

Which letter is associated with a zone (in a relaxed muscle) that is a little more lightly shaded because only thick filaments are present?

Answer 2

H

Question 3

The presence of mitochondria and myoglobin facilitate _________ respiration in muscle cells.

Answer 3

aerobic

Question 4

Which are the reservoirs that store the calcium required for muscle contraction?

Answer 4

Terminal cisternae

Question 5

The type of muscle fibers that have only a single nucleus, both thick and thin filaments, but no Z discs, are

Answer 5

smooth.

Question 6

The most abundant form of smooth muscle is

Answer 6

single-unit, which is also known as visceral smooth muscle.

Question 7

Which letter is associated with the light band and contains thin filaments only?

Answer 7

I

Question 8

A term that describes the change in muscle following a lack of exercise is

Answer 8

atrophy.

Question 9

This figure shows the muscles of facial expression. What muscle does number 1 indicate?

Answer 9

Platysma

Question 10

Many of the muscles in the anterior compartment of the forearm work to _______ the wrist, and they have their proximal attachment on the _______ epicondyle of the humerus.

Answer 10

flex, medial

Question 11

There are three anterior thoracic muscles. Select the exception

Answer 11

Levator scapulae

Question 12

When the left and right splenius capitis contract together, the resulting movement is

Answer 12

extension of the neck.

Question 13

For elbow flexion,

Answer 13

biceps brachii is the agonist and triceps brachii is the antagonist.

Question 14

These two muscles are known as the triceps surae and together are the most powerful plantar flexors of all of the leg muscles.

Answer 14

Gastrocnemius and soleus

Question 15

If you were to remove the gastrocnemius muscle, you would expose the

Answer 15

soleus.

Question 16

This figure shows a lateral view of the right thigh. What muscle does number 1 indicate?

Answer 16

Vastus lateralis

Question 17

You hear a sharp noise to your left causing you to shift your eyes in that direction. Which muscles were responsible for your glance?

Answer 17

Left eye - lateral rectus, right eye - medial rectus

Question 18

This figure shows the muscles of the anterior neck. What muscle does number 3 indicate?

Answer 18

Sternocleidomastoid

Question 19

This figure shows a posterior view of the right thigh. What muscle does number 2 indicate?

Answer 19

Semitendinosus