Question 1

The muscle contracts but does not shorten,even though an increase in muscle tension does occur.This sentence describes

Accepted Answer

A)  twitch contractions 
B)  tetanic contractions 
C)  isotonic contractions 
D)  isometric contractions 
A)  twitch contractions 
B)  tetanic contractions 
C)  isotonic contractions 
D)  isometric contractions D

Question 2

Name and give the location of the three types of muscle tissue.

Accepted Answer

The three types of muscle tissue are skeletal muscle, cardiac muscle, and smooth muscle. Each type has a distinct location and function within the human body:

1. Skeletal Muscle:
Location: Skeletal muscles are attached to bones by tendons and are distributed throughout the body. They are responsible for voluntary movements and are found in limbs, the torso, and the face, among other regions.
Function: These muscles are under voluntary control and are used to produce movement by contracting and pulling on bones. They also help maintain posture and generate heat.

2. Cardiac Muscle:
Location: Cardiac muscle tissue is found exclusively in the walls of the heart.
Function: This type of muscle is responsible for pumping blood throughout the body. It has unique features such as intercalated discs that allow the cells to contract in a coordinated and rhythmic manner. Cardiac muscle is involuntary, meaning it functions without conscious control.

3. Smooth Muscle:
Location: Smooth muscle tissue is located in the walls of hollow organs such as the stomach, intestines, blood vessels, and the bladder.
Function: Smooth muscle contractions are involuntary and help move substances through the body, such as food through the digestive system or blood through the circulatory system. They also play a role in adjusting the diameter of blood vessels to regulate blood pressure and flow.

Question 3

When a muscle fiber is exposed to a greater-than-threshold stimulus,it contracts completely.This is called an all-or-none response.

Accepted Answer

A) True 
 B)False  True

Question 4

Match the muscles of the head and neck with their function.
-Raises eyebrows

Accepted Answer

A) Orbicularis oris 
B) Orbicularis oculi 
C) Sternocleidomastoid 
D) Masseter 
E) Frontal
F)Zygomaticus
G)Trapezius 
A) Orbicularis oris 
B) Orbicularis oculi 
C) Sternocleidomastoid 
D) Masseter 
E) Frontal
F)Zygomaticus
G)Trapezius

Question 5

Strength training results in an increase in the number of myofilaments in each muscle fiber.

Accepted Answer

A) True 
 B)False

Question 6

If you weigh 120 pounds,you have about 50 pounds of skeletal muscles.

Accepted Answer

A) True 
 B)False

Question 7

The main function of calcium when it is released into the sarcomere is to assist ATP in energy release.

Accepted Answer

A) True 
 B)False

Question 8

Involuntary muscles are also called visceral muscles.

Accepted Answer

A) True 
 B)False

Question 9

Match the body movement term with its definition.
-Makes the angle between the two bones at the joint smaller

Accepted Answer

A) Flexion 
B) Extension 
C) Abduction 
D) Adduction 
E) Supination
F)Pronation
G)Dorsiflexion
H)Plantar flexion
I)Inversion
J)Eversion 
A) Flexion 
B) Extension 
C) Abduction 
D) Adduction 
E) Supination
F)Pronation
G)Dorsiflexion
H)Plantar flexion
I)Inversion
J)Eversion

Question 10

What part of the body does the rectus abdominis move?

Accepted Answer

A)  Head and neck 
B)  Upper extremities 
C)  Trunk of the body 
D)  Lower extremities 
A)  Head and neck 
B)  Upper extremities 
C)  Trunk of the body 
D)  Lower extremities

Question 11

In the flexion of the elbow,which muscle group functions as the prime mover,a synergist,and an antagonist?

Accepted Answer

In the flexion of the elbow, the muscles

Question 12

What part of the body does the biceps femoris move?

Accepted Answer

A)  Head and neck 
B)  Upper extremities 
C)  Trunk of the body 
D)  Lower extremities 
A)  Head and neck 
B)  Upper extremities 
C)  Trunk of the body 
D)  Lower extremities

Question 13

When muscles must use energy release that does not require oxygen,the waste product ascorbic acid is produced,which can cause soreness in the muscle.

Accepted Answer

A) True 
 B)False

Question 14

The contraction of the biceps brachii muscle causes flexion of the elbow joint.

Accepted Answer

A) True 
 B)False

Question 15

Smooth muscle is also called voluntary muscle.

Accepted Answer

A) True 
 B)False

Question 16

What is the all-or-none response? If the all-or-none response occurs in muscle cells,explain what occurs differently in a muscle when you lift a 5-lb weight and a 50-lb weight.

Accepted Answer

The all-or-none response is a principle

Question 17

If a prime mover flexes a joint

Accepted Answer

A)  the synergist will extend the joint 
B)  the synergist and antagonist will extend the joint 
C)  the antagonist will extend the joint 
D)  the antagonist will assist in flexing the joint 
A)  the synergist will extend the joint 
B)  the synergist and antagonist will extend the joint 
C)  the antagonist will extend the joint 
D)  the antagonist will assist in flexing the joint

Question 18

Match each of the terms with its definition or explanation.
-Single motor neuron with all the muscle cells it innervates

Accepted Answer

A) Skeletal muscle 
B) Smooth muscle 
C) Origin 
D) Insertion 
E) Actin
F)Myosin
G)Motor unit
H)Neuromuscular junction
I)Isotonic
J)Isometric 
A) Skeletal muscle 
B) Smooth muscle 
C) Origin 
D) Insertion 
E) Actin
F)Myosin
G)Motor unit
H)Neuromuscular junction
I)Isotonic
J)Isometric

Question 19

Bursae are small,fluid-filled sacs that lie between some tendons and bones.

Accepted Answer

A) True 
 B)False

Question 20

The respiratory and nervous systems,in addition to the muscular system,play important roles in body movement.

Accepted Answer

A) True 
 B)False

Exam 8: Muscular System

The muscle contracts but does not shorten,even though an increase in muscle tension does occur.This sentence describes

Name and give the location of the three types of muscle tissue.

When a muscle fiber is exposed to a greater-than-threshold stimulus,it contracts completely.This is called an all-or-none response.

Match the muscles of the head and neck with their function. -Raises eyebrows

Strength training results in an increase in the number of myofilaments in each muscle fiber.

If you weigh 120 pounds,you have about 50 pounds of skeletal muscles.

The main function of calcium when it is released into the sarcomere is to assist ATP in energy release.

Involuntary muscles are also called visceral muscles.

Match the body movement term with its definition. -Makes the angle between the two bones at the joint smaller

What part of the body does the rectus abdominis move?

In the flexion of the elbow,which muscle group functions as the prime mover,a synergist,and an antagonist?

What part of the body does the biceps femoris move?

When muscles must use energy release that does not require oxygen,the waste product ascorbic acid is produced,which can cause soreness in the muscle.

The contraction of the biceps brachii muscle causes flexion of the elbow joint.

Smooth muscle is also called voluntary muscle.

What is the all-or-none response? If the all-or-none response occurs in muscle cells,explain what occurs differently in a muscle when you lift a 5-lb weight and a 50-lb weight.

If a prime mover flexes a joint

Match each of the terms with its definition or explanation. -Single motor neuron with all the muscle cells it innervates

Bursae are small,fluid-filled sacs that lie between some tendons and bones.

The respiratory and nervous systems,in addition to the muscular system,play important roles in body movement.

Introduction to the Body

Chemistry of Life

Cells

Tissues

Organ Systems

Skin and Membranes

Skeletal System

Nervous System

Senses

Endocrine System

Blood

Cardiovascular System

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Reproductive Systems

Growth and Development

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