Question 1

Which of the following best describes the relationship between origin and insertion during muscle contraction?

Accepted Answer

The insertion moves toward the origin.

Question 2

Which muscle arrangement is best suited for generating the greatest range of motion?

Accepted Answer

Parallel

Question 3

During aerobic exercise, which physiological change is LEAST likely to occur in skeletal muscle?

Accepted Answer

Decrease in muscle fiber size

Question 4

Which of the following is TRUE regarding smooth muscle tissue?

Accepted Answer

It is innervated by the autonomic nervous system.

Question 5

A muscle that assists the prime mover by adding extra force or reducing unnecessary movement is called a:

Accepted Answer

Synergist

Question 6

Which equation best represents the force generated by a muscle based on the number of cross bridges attached?

Accepted Answer

$$ F = n 	imes f_{cb} $$

Question 7

Which lever system is exemplified by the action of the calf muscles when standing on tiptoe?

Accepted Answer

Second-class lever

Question 8

Which muscle is the prime mover for jaw closure?

Accepted Answer

Temporalis

Question 9

Which of the following muscles is NOT part of the quadriceps femoris group?

Accepted Answer

Semimembranosus

Question 10

Which muscle arrangement is characterized by fascicles converging toward a single tendon insertion?

Accepted Answer

Convergent

Question 11

Which factor does NOT directly increase the force of muscle contraction?

Accepted Answer

Length of tendon

Question 12

Which muscle is responsible for flexing the forearm at the elbow joint?

Accepted Answer

Biceps brachii

Question 13

Which of the following is a function of the pelvic diaphragm?

Accepted Answer

Seals the inferior outlet of the pelvis

Question 14

Which muscle is involved in forced expiration?

Accepted Answer

Internal intercostals

Question 15

Which muscle group is primarily responsible for thigh extension and knee flexion?

Accepted Answer

Hamstrings

Question 16

Which of the following is TRUE about muscle naming conventions?

Accepted Answer

Muscle names can indicate location, shape, size, and action.

Question 17

Which muscle is NOT involved in tongue movement?

Accepted Answer

Masseter

Question 18

Which equation best describes the mechanical advantage of a lever system?

Accepted Answer

$$ MA = \frac{length_{effort}}{length_{load}} $$

Question 19

Which muscle is a powerful forearm extensor?

Accepted Answer

Triceps brachii

Question 20

Which muscle is responsible for smiling?

Accepted Answer

Zygomaticus major

The Muscular System: Structure, Function, and Major Muscles

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