Question 1

What is the function of the masseter muscle?

Accepted Answer

A)  Adducts the thigh 
B)  Chews food 
C)  Lifts the eyelid 
D)  Flexes the forearm at the elbow 
A)  Adducts the thigh 
B)  Chews food 
C)  Lifts the eyelid 
D)  Flexes the forearm at the elbow

Question 2

The smiling muscle is the

Accepted Answer

A)  buccinator. 
B)  zygomaticus. 
C)  frontalis. 
D)  orbicularis oris. 
A)  buccinator. 
B)  zygomaticus. 
C)  frontalis. 
D)  orbicularis oris.

Question 3

The gastrocnemius and the soleus are commonly called the

Accepted Answer

A)  swimmer's muscles. 
B)  toe dancer's muscles. 
C)  rotator cuff muscles. 
D)  trumpeter's muscles. 
A)  swimmer's muscles. 
B)  toe dancer's muscles. 
C)  rotator cuff muscles. 
D)  trumpeter's muscles.

Question 4

Which of the following does not refer to the thin filament?

Accepted Answer

A)  Myosin binding site 
B)  Troponin 
C)  Tropomyosin 
D)  Myosin 
A)  Myosin binding site 
B)  Troponin 
C)  Tropomyosin 
D)  Myosin

Question 5

The biceps brachii,brachioradialis,and brachialis muscles

Accepted Answer

A)  have their origin on the scapula. 
B)  act synergistically with the triceps brachii. 
C)  extend the forearm. 
D)  flex the forearm at the elbow. 
A)  have their origin on the scapula. 
B)  act synergistically with the triceps brachii. 
C)  extend the forearm. 
D)  flex the forearm at the elbow.

Question 6

Which muscle separates the thoracic and abdominal cavities and is also the chief breathing muscle?

Accepted Answer

A)  Serratus anterior 
B)  Intercostal muscle 
C)  Sternocleidomastoid 
D)  Diaphragm 
A)  Serratus anterior 
B)  Intercostal muscle 
C)  Sternocleidomastoid 
D)  Diaphragm

Question 7

What is the stimulus for the release of ACh from the prejunctional membrane?

Accepted Answer

A)  Acetylcholinesterase 
B)  Nerve action potential 
C)  Release of calcium by the SR 
D)  Muscle membrane electrical signal 
A)  Acetylcholinesterase 
B)  Nerve action potential 
C)  Release of calcium by the SR 
D)  Muscle membrane electrical signal

Question 8

Which of the following "muscle words" refers to the chest?

Accepted Answer

A)  Rectus 
B)  Latissimus 
C)  Vastus 
D)  Pectoralis 
A)  Rectus 
B)  Latissimus 
C)  Vastus 
D)  Pectoralis

Question 9

Which of the following is composed of a series of sarcomeres?

Accepted Answer

A)  Myofibrils 
B)  Aponeuroses 
C)  Tendons 
D)  Ligaments 
A)  Myofibrils 
B)  Aponeuroses 
C)  Tendons 
D)  Ligaments

Question 10

The somatic motor nerve that supplies the muscles of the thigh has been severed; therefore,the person

Accepted Answer

A)  will be able to walk only if he or she receives IV calcium. 
B)  cannot walk. 
C)  can walk but has no feeling in the lower extremities. 
D)  can stand but cannot walk. 
A)  will be able to walk only if he or she receives IV calcium. 
B)  cannot walk. 
C)  can walk but has no feeling in the lower extremities. 
D)  can stand but cannot walk.

Question 11

This muscle group has four muscles: two oblique,one rectus,and one transverse.

Accepted Answer

A)  Quadriceps femoris 
B)  Hamstrings 
C)  Adductors 
D)  Abdominal 
A)  Quadriceps femoris 
B)  Hamstrings 
C)  Adductors 
D)  Abdominal

Question 12

Which of the following describes a muscle that remains in a contracted state?

Accepted Answer

A)  Twitch 
B)  Tetany 
C)  Atrophy 
D)  Hypertrophy 
A)  Twitch 
B)  Tetany 
C)  Atrophy 
D)  Hypertrophy

Question 13

Which group is incorrect?

Accepted Answer

A)  Types of striated muscle: skeletal, cardiac, smooth 
B)  Movements: extension, pronation, adduction 
C)  Movements: flexion, supination, abduction 
D)  Muscles of the face: frontalis, buccinator, masseter 
A)  Types of striated muscle: skeletal, cardiac, smooth 
B)  Movements: extension, pronation, adduction 
C)  Movements: flexion, supination, abduction 
D)  Muscles of the face: frontalis, buccinator, masseter

Question 14

Which of the following increases the force of contraction of a whole muscle?

Accepted Answer

A)  Twitch 
B)  Contracture 
C)  Ossification 
D)  Recruitment 
A)  Twitch 
B)  Contracture 
C)  Ossification 
D)  Recruitment

Question 15

Acetylcholinesterase

Accepted Answer

A)  inactivates the NM receptors. 
B)  is the stimulus for the release of calcium from the SR. 
C)  degrades ACh. 
D)  binds calcium, making it unavailable to the sarcomere. 
A)  inactivates the NM receptors. 
B)  is the stimulus for the release of calcium from the SR. 
C)  degrades ACh. 
D)  binds calcium, making it unavailable to the sarcomere.

Question 16

With regard to skeletal muscle contraction,which event comes last?

Accepted Answer

A)  Shortening of the sarcomere 
B)  Release of calcium from the sarcoplasmic reticulum 
C)  Activation of the NM receptors by ACh 
D)  Release of neurotransmitter (ACh) from the somatic motor neuron 
A)  Shortening of the sarcomere 
B)  Release of calcium from the sarcoplasmic reticulum 
C)  Activation of the NM receptors by ACh 
D)  Release of neurotransmitter (ACh) from the somatic motor neuron

Question 17

Contraction of the right sternocleidomastoid muscle

Accepted Answer

A)  acts antagonistically to the pectoralis major. 
B)  acts synergistically with the trapezius. 
C)  hyperextends the head. 
D)  rotates the head down and to the left. 
A)  acts antagonistically to the pectoralis major. 
B)  acts synergistically with the trapezius. 
C)  hyperextends the head. 
D)  rotates the head down and to the left.

Question 18

The muscles of mastication must insert on the

Accepted Answer

A)  maxilla. 
B)  palatine bone. 
C)  mandible. 
D)  zygomatic bone. 
A)  maxilla. 
B)  palatine bone. 
C)  mandible. 
D)  zygomatic bone.

Question 19

How does curare paralyze a muscle?

Accepted Answer

A)  Depletes the sarcomere of calcium 
B)  Blocks the prejunctional release of ACh 
C)  Blocks the postjunctional NM receptors 
D)  Degrades the cholinesterase within the NMJ 
A)  Depletes the sarcomere of calcium 
B)  Blocks the prejunctional release of ACh 
C)  Blocks the postjunctional NM receptors 
D)  Degrades the cholinesterase within the NMJ

Question 20

This muscle flattens the cheek and positions the food between the teeth.

Accepted Answer

A)  Masseter 
B)  Temporalis 
C)  Buccinator 
D)  Zygomaticus 
A)  Masseter 
B)  Temporalis 
C)  Buccinator 
D)  Zygomaticus

Exam 9: Muscular System

What is the function of the masseter muscle?

The smiling muscle is the

The gastrocnemius and the soleus are commonly called the

Which of the following does not refer to the thin filament?

The biceps brachii,brachioradialis,and brachialis muscles

Which muscle separates the thoracic and abdominal cavities and is also the chief breathing muscle?

What is the stimulus for the release of ACh from the prejunctional membrane?

Which of the following "muscle words" refers to the chest?

Which of the following is composed of a series of sarcomeres?

The somatic motor nerve that supplies the muscles of the thigh has been severed; therefore,the person

This muscle group has four muscles: two oblique,one rectus,and one transverse.

Which of the following describes a muscle that remains in a contracted state?

Which group is incorrect?

Which of the following increases the force of contraction of a whole muscle?

Acetylcholinesterase

With regard to skeletal muscle contraction,which event comes last?

Contraction of the right sternocleidomastoid muscle

The muscles of mastication must insert on the

How does curare paralyze a muscle?

This muscle flattens the cheek and positions the food between the teeth.

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Anatomy of the Heart

Function of the Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

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