Question 1

Match each term with its corresponding definition or description.
-Protein that looks like "bundled golf clubs"; makes up the thick myofilament

Accepted Answer

A)  Actin
B)  Sarcolemma
C)  Contractility
D)  Tropomyosin
E)  ExtensibilityF) MyosinG) T-tubuleH) IrritabilityI) SarcomereJ) TroponinK) Motor unit F

Question 2

When sarcomeres shorten, myofibrils also shorten.

Accepted Answer

A) True 
 B)False  False

Question 3

T-tubules are perpendicular to muscle fibers.

Accepted Answer

A) True 
 B)False  True

Question 4

Endurance training usually results in muscle hypertrophy.

Accepted Answer

A) True 
 B)False

Question 5

A contraction in which the tension within the muscle remains the same but the length changes is called a(n) _____ contraction.

Accepted Answer

A)  tonic
B)  isotonic
C)  isometric
D)  tetanic

Question 6

Muscles with less than normal muscle tone are called spastic.

Accepted Answer

A) True 
 B)False

Question 7

Muscle pain may also be referred to as muscular dystrophy.

Accepted Answer

A) True 
 B)False

Question 8

Match each term with its corresponding description regarding the sliding-filament theory.
-Chemical released by the motor neuron that initiates the stimulus for a muscle contraction

Accepted Answer

A)  Troponin
B)  Myosin
C)  Actin
D)  T-tubules
E)  ATPF) CalciumG) Cross-bridgesH) TropomyosinI) Acetylcholine

Question 9

Match each term with its corresponding definition or description.
-Inward extensions of the sarcolemma that allow impulses to go deeper into the cell

Accepted Answer

A)  Actin
B)  Sarcolemma
C)  Contractility
D)  Tropomyosin
E)  ExtensibilityF) MyosinG) T-tubuleH) IrritabilityI) SarcomereJ) TroponinK) Motor unit

Question 10

Acetylcholine is the neurotransmitter that stimulates muscle contraction.

Accepted Answer

A) True 
 B)False

Question 11

An accumulation of lactate in the muscle is the result of an oxygen debt.

Accepted Answer

A) True 
 B)False

Question 12

The difference between red and white fibers is the amount of glycogen.

Accepted Answer

A) True 
 B)False

Question 13

Match each term with its corresponding description regarding the sliding-filament theory.
-Protein that has receptor sites for an ion that causes it to change shape and pull another protein away from the receptor sites on the actin

Accepted Answer

A)  Troponin
B)  Myosin
C)  Actin
D)  T-tubules
E)  ATPF) CalciumG) Cross-bridgesH) TropomyosinI) Acetylcholine

Question 14

Which of the following is an incorrect statement regarding heat production?

Accepted Answer

A)  The body temperature set point is established by the hypothalamus.
B)  Shivering will increase body temperature.
C)  Body temperature functions on a negative-feedback mechanism.
D)  All of the above are correct.

Question 15

For continued, efficient nutrient catabolism by muscle fibers, both glucose and oxygen are required.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is not a name for a muscle cell?

Accepted Answer

A)  Muscle fiber
B)  Sarcocyte
C)  Myocyte
D)  All of the above are names for muscle cells.

Question 17

Convulsions are abnormal, uncoordinated tetanic contractions of varying groups of muscles.

Accepted Answer

A) True 
 B)False

Question 18

Muscle fibers use creatine phosphate to restore their ATP population.

Accepted Answer

A) True 
 B)False

Question 19

Cardiac fibers form a continuous electrically coupled mass called a syncytium.

Accepted Answer

A) True 
 B)False

Question 20

From smallest to largest, which of the following is the correct order of arrangement?

Accepted Answer

A)  Fiber, myofibril, myofilament
B)  Myofibril, myofilament, fiber
C)  Myofilament, myofibril, fiber
D)  Fiber, myofilament, myofibril

Exam 17: Muscle Contraction

Match each term with its corresponding definition or description. -Protein that looks like "bundled golf clubs"; makes up the thick myofilament

When sarcomeres shorten, myofibrils also shorten.

T-tubules are perpendicular to muscle fibers.

Endurance training usually results in muscle hypertrophy.

A contraction in which the tension within the muscle remains the same but the length changes is called a(n) _____ contraction.

Muscles with less than normal muscle tone are called spastic.

Muscle pain may also be referred to as muscular dystrophy.

Match each term with its corresponding description regarding the sliding-filament theory. -Chemical released by the motor neuron that initiates the stimulus for a muscle contraction

Match each term with its corresponding definition or description. -Inward extensions of the sarcolemma that allow impulses to go deeper into the cell

Acetylcholine is the neurotransmitter that stimulates muscle contraction.

An accumulation of lactate in the muscle is the result of an oxygen debt.

The difference between red and white fibers is the amount of glycogen.

Match each term with its corresponding description regarding the sliding-filament theory. -Protein that has receptor sites for an ion that causes it to change shape and pull another protein away from the receptor sites on the actin

Which of the following is an incorrect statement regarding heat production?

For continued, efficient nutrient catabolism by muscle fibers, both glucose and oxygen are required.

Which of the following is not a name for a muscle cell?

Convulsions are abnormal, uncoordinated tetanic contractions of varying groups of muscles.

Muscle fibers use creatine phosphate to restore their ATP population.

Cardiac fibers form a continuous electrically coupled mass called a syncytium.

From smallest to largest, which of the following is the correct order of arrangement?