Question 1

Indicate which type of muscle is associated with the property in question by using the answer code (options may be used more than once or not at all).
-innervated by the autonomic nervous system

Accepted Answer

A) skeletal muscle only 
B) single-unit smooth muscle only 
C) cardiac muscle only 
D) skeletal muscle and cardiac muscle 
E) skeletal muscle and single-unit smooth muscle
F)single-unit smooth muscle and cardiac muscle
G)skeletal, single-unit smooth, and cardiac muscles

Question 2

Twitch summation is similar to the ____________________ summation of EPSPs.

Accepted Answer

The answer of Twitch summation is similar to the ____________________...

Question 3

Fatigue is the failure of a muscle fibre to maintain what as a result of previous contractile activity?

Accepted Answer

A)  excitability 
B)  muscle mass 
C)  tension 
D)  sarcomere number

Question 4

____________________ proteins are calcium release channels in the muscle cell.

Accepted Answer

The answer of ____________________ proteins are calcium release channels in...

Question 5

MATCHING
Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by using the following code (options may be used more than once or not at all).
-can bind with myosin during muscle contraction

Accepted Answer

A) actin only 
B) myosin only 
C) actin and myosin 
D) troponin-tropomyosin complex 
E) actin, troponin, and tropomyosin
F)actin, myosin, troponin, and tropomyosin

Question 6

Increasing the number of recruited motor units in a muscle increases its force or strength of contraction.

Accepted Answer

A) True 
 B)False

Question 7

Match the sarcomere component with the correct characteristic by using the answer code (options may be used more than once or not at all).
-joins adjacent sarcomeres together

Accepted Answer

A) Z line 
B) A band 
C) I band 
D) H zone

Question 8

Match the muscle type with the correct characteristics by using the answer code.
____ cardiac muscle
____ multiunit smooth muscle
____ single unit smooth muscle
____ skeletal muscle
a. voluntary, neurogenic, and striated
b. voluntary, neurogenic, and nonstriated
c. involuntary, myogenic, and striated
d. involuntary, neurogenic and nonstriated
e. involuntary, myogenic, and nonstriated

Accepted Answer

The answer of Match the muscle type with the correct...

Question 9

How are Sarcomeres arranged end to end?

Accepted Answer

A)  as fascicles 
B)  as myofibrils 
C)  as bands 
D)  as perimysia

Question 10

Which statement concerning cross bridges is INCORRECT?

Accepted Answer

A)  They are formed by the globular heads of the myosin molecules as they protrude from the thick filaments. 
B)  They bind to actin during muscle contraction. 
C)  They are not found in the I band. 
D)  They bind with troponin and tropomyosin during muscle contraction to pull them away from the actin helical chain.

Question 11

What is involved in developing muscle fibres tension?

Accepted Answer

A)  contraction of sarcomeres 
B)  lengthening of sarcomeres 
C)  the pushing of myosin by actin 
D)  elongation of myosin fibres

Question 12

Foot proteins link the actin molecules together within a thin filament.

Accepted Answer

A) True 
 B)False

Question 13

Which statement is correct for twitch summation?

Accepted Answer

A)  It is a means by which weak muscle contraction may be accomplished. 
B)  It results from increasing the number of motor units that are firing within a muscle. 
C)  It results from increasing the frequency at which motor units are firing within a muscle. 
D)  A high level of calcium ion is not required in twitch summation.

Question 14

With eccentric muscle contractions which statement is true?

Accepted Answer

A)  the development of tension occurs at constant muscle length. 
B)  the muscle lengthens while contracting. 
C)  the muscle shortens while contracting. 
D)  muscle length and tension vary throughout a range of motion.

Question 15

MATCHING
Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by using the following code (options may be used more than once or not at all).
-found in thick filament

Accepted Answer

A) actin only 
B) myosin only 
C) actin and myosin 
D) troponin-tropomyosin complex 
E) actin, troponin, and tropomyosin
F)actin, myosin, troponin, and tropomyosin

Question 16

Binding of which substance to myosin permits cross bridge of which action between actin and myosin?

Accepted Answer

A)  Binding ATP will bind actin and myosin. 
B)  Binding ATP will detach actin and myosin 
C)  Binding calcium will bind actin and myosin. 
D)  Binding calcium will detach actin and myosin.

Question 17

Thin and thick filaments overlap in the A band.

Accepted Answer

A) True 
 B)False

Question 18

The source of calcium in smooth muscle is the ____________________.

Accepted Answer

The answer of The source of calcium in smooth muscle...

Question 19

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all).
-the most powerful fibre

Accepted Answer

A) slow-oxidative fibre 
B) fast-oxidative fibre 
C) fast-glycolytic fibre

Question 20

All smooth muscle is myogenic.

Accepted Answer

A) True 
 B)False

Exam 6: Muscle Physiology

Indicate which type of muscle is associated with the property in question by using the answer code (options may be used more than once or not at all) . -innervated by the autonomic nervous system

Twitch summation is similar to the ____________________ summation of EPSPs.

Fatigue is the failure of a muscle fibre to maintain what as a result of previous contractile activity?

____________________ proteins are calcium release channels in the muscle cell.

MATCHING Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by using the following code (options may be used more than once or not at all) . -can bind with myosin during muscle contraction

Increasing the number of recruited motor units in a muscle increases its force or strength of contraction.

Match the sarcomere component with the correct characteristic by using the answer code (options may be used more than once or not at all) . -joins adjacent sarcomeres together

How are Sarcomeres arranged end to end?

Which statement concerning cross bridges is INCORRECT?

What is involved in developing muscle fibres tension?

Foot proteins link the actin molecules together within a thin filament.

Which statement is correct for twitch summation?

With eccentric muscle contractions which statement is true?

MATCHING Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by using the following code (options may be used more than once or not at all) . -found in thick filament

Binding of which substance to myosin permits cross bridge of which action between actin and myosin?

Thin and thick filaments overlap in the A band.

The source of calcium in smooth muscle is the ____________________.

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all) . -the most powerful fibre

All smooth muscle is myogenic.