Question 1

Match each term with its corresponding definition or description.
-Protein that blocks the receptor sites on the actin molecule

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 2

Sarcolemma is a:

Accepted Answer

A) system of transverse tubules that extend at a right angle to the long axis of the cell. 
B) segment of the myofibril between two successive Z-lines. 
C) unique name for the plasma membrane of a muscle fiber. 
D) None of the above are correct. 
A) system of transverse tubules that extend at a right angle to the long axis of the cell. 
B) segment of the myofibril between two successive Z-lines. 
C) unique name for the plasma membrane of a muscle fiber. 
D) None of the above are correct.

Question 3

The type of contraction exhibited by normal skeletal muscles most of the time is called tetanus.

Accepted Answer

A) True 
 B)False

Question 4

Cardiac muscles require a stimulus from a motor neuron to contract, just as striated muscles do.

Accepted Answer

A) True 
 B)False

Question 5

There are two types of isometric contractions: concentric contractions and eccentric contractions.

Accepted Answer

A) True 
 B)False

Question 6

Myosin filaments interact with actin filaments during muscle contraction.

Accepted Answer

A) True 
 B)False

Question 7

Treppe is a steep increase in the strength of contractions that can be seen in a series of twitch contractions.

Accepted Answer

A) True 
 B)False

Question 8

Muscle cells have one nucleus and one mitochondrion.

Accepted Answer

A) True 
 B)False

Question 9

Cramps are painful, involuntary muscle spasms.

Accepted Answer

A) True 
 B)False

Question 10

Muscles with less-than-normal tone are described as in tetanus.

Accepted Answer

A) True 
 B)False

Question 11

A tetanic contraction is stimulated by a single stimulus.

Accepted Answer

A) True 
 B)False

Question 12

The graded strength principle states that skeletal muscles contract with varying degrees of strength at different times.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following statements about cardiac muscle is incorrect?

Accepted Answer

A) Cardiac muscle forms an electrically coupled mass called a syncytium. 
B) Much of the calcium necessary for contraction comes from outside the cell. 
C) In cardiac muscles, the T-tubules form dyads rather than the triads formed in skeletal muscles. 
D) All of the above statements are correct. 
A) Cardiac muscle forms an electrically coupled mass called a syncytium. 
B) Much of the calcium necessary for contraction comes from outside the cell. 
C) In cardiac muscles, the T-tubules form dyads rather than the triads formed in skeletal muscles. 
D) All of the above statements are correct.

Question 14

The result of endurance training is more blood vessels, not more muscle cells.

Accepted Answer

A) True 
 B)False

Question 15

Explain how glycogen and myoglobin aid in muscle contraction.

Accepted Answer

Glycogen and myoglobin both play importa

Question 16

Name and describe the myofilament fibers in the sarcomere.

Accepted Answer

The sarcomere is the basic contractile u

Question 17

Which structure functions to temporarily store calcium ions?

Accepted Answer

A) T-tubules 
B) Sarcolemma 
C) Sarcoplasmic reticulum 
D) Myofilaments 
A) T-tubules 
B) Sarcolemma 
C) Sarcoplasmic reticulum 
D) Myofilaments

Question 18

Match each term with its corresponding definition or description.
-The ability of a muscle to stretch

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 19

Match each term with its corresponding definition or description.
-Name given to the plasma membrane of a muscle cell

Accepted Answer

A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit 
A) Actin 
B) Sarcolemma 
C) Contractility 
D) Tropomyosin 
E) Extensibility
F)Myosin
G)T-tubule
H)Irritability
I)Sarcomere
J)Troponin
K)Motor unit

Question 20

Describe and/or diagram the sarcomere.

Accepted Answer

The sarcomere is the basic unit of muscl

Exam 17: Muscle Contraction

Match each term with its corresponding definition or description. -Protein that blocks the receptor sites on the actin molecule

Sarcolemma is a:

The type of contraction exhibited by normal skeletal muscles most of the time is called tetanus.

Cardiac muscles require a stimulus from a motor neuron to contract, just as striated muscles do.

There are two types of isometric contractions: concentric contractions and eccentric contractions.

Myosin filaments interact with actin filaments during muscle contraction.

Treppe is a steep increase in the strength of contractions that can be seen in a series of twitch contractions.

Muscle cells have one nucleus and one mitochondrion.

Cramps are painful, involuntary muscle spasms.

Muscles with less-than-normal tone are described as in tetanus.

A tetanic contraction is stimulated by a single stimulus.

The graded strength principle states that skeletal muscles contract with varying degrees of strength at different times.

Which of the following statements about cardiac muscle is incorrect?

The result of endurance training is more blood vessels, not more muscle cells.

Explain how glycogen and myoglobin aid in muscle contraction.

Name and describe the myofilament fibers in the sarcomere.

Which structure functions to temporarily store calcium ions?

Match each term with its corresponding definition or description. -The ability of a muscle to stretch

Match each term with its corresponding definition or description. -Name given to the plasma membrane of a muscle cell

Describe and/or diagram the sarcomere.

Organization of the Body

Homeostasis

Chemistry of Life

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Nervous System Cells

Nerve Signaling

Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Heart

Blood Vessels

Circulation of the Blood

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

Respiratory Tract

Ventilation

Gas Exchange Transport

Upper Digestive Tract

Lower Digestive Tract

Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

Female Reproductive System

Growth, Development, and Aging

Genetics and Heredity

Filters