$$\text{Force} \times \text{Lever Arm} = \text{Resistance} \times \text{Resistance Arm}$$

Question 1

Which muscle is primarily responsible for flexion of the forearm at the elbow joint, and what is its antagonist?

Accepted Answer

Biceps brachii; antagonist is triceps brachii

Question 2

A muscle that crosses on the lateral side of a joint produces which movement?

Accepted Answer

Abduction

Question 3

Which of the following is NOT a criterion used in naming skeletal muscles?

Accepted Answer

Type of nerve supply

Question 4

If a muscle crosses the anterior side of the hip joint, what action does it most likely produce?

Accepted Answer

Flexion of the thigh

Question 5

Which muscle group is responsible for extension of the knee?

Accepted Answer

Quadriceps femoris

Question 6

The deltoid muscle is named based on which criterion?

Accepted Answer

Shape of the muscle

Question 7

Which of the following muscles is a synergist in elbow flexion?

Accepted Answer

Brachioradialis

Question 8

A muscle that crosses the posterior side of the knee joint produces which action?

Accepted Answer

Flexion

Question 9

Which muscle is the prime mover for abduction of the arm?

Accepted Answer

Deltoid

Question 10

What is the function of a fixator muscle?

Accepted Answer

Immobilizes bone or muscle's origin to provide a stable base for the prime mover

Question 11

Which muscle is located on the temporal bone and is involved in mastication?

Accepted Answer

Temporalis

Question 12

If the pectoralis major is the prime mover for flexion of the arm, which muscle acts as its antagonist?

Accepted Answer

Latissimus dorsi

Question 13

Which muscle is NOT part of the quadriceps femoris group?

Accepted Answer

Biceps femoris

Question 14

Which equation best represents the principle of leverage in muscle action?

Accepted Answer

$$	ext{Force} 	imes 	ext{Lever Arm} = 	ext{Resistance} 	imes 	ext{Resistance Arm}$$

Question 15

Which muscle is responsible for compressing the abdomen and flexing the vertebral column?

Accepted Answer

Rectus abdominis

Question 16

A muscle named 'triceps' is so called because:

Accepted Answer

It has three origins (heads)

Question 17

Which muscle is a prime mover for extension of the forearm?

Accepted Answer

Triceps brachii

Question 18

Which muscle is located in the anterior compartment of the leg and is responsible for dorsiflexion?

Accepted Answer

Tibialis anterior

Question 19

Which muscle is responsible for adduction of the thigh?

Accepted Answer

Adductor longus

Question 20

Which muscle is a synergist that helps the prime mover by reducing unnecessary movement?

Accepted Answer

Synergist

Chapter 10:The Muscular System: Structure, Function, and Major Muscles

Study Guide - Practice Questions