Question 1

Indicate which characteristic applies to the specific type of muscle contraction:
a.isometric
b.isotonic
c.eccentric
d.concentric
e.isometric and eccentric
f.isotonic and concentric
g.isotonic, eccentric, and concentric
-Length changes

Accepted Answer

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Question 2

Indicate which of the characteristics in question apply to each of the muscle fiber types by using the following answer code:
a.Slow-oxidative fiber
b.Fast-oxidative fiber
c.Fast-glycolytic fiber
d.Slow-oxidative fiber and fast-oxidative fiber
e.Fast-oxidative fiber and fast-glycolytic fiber
f.Slow-oxidative fiber, fast-oxidative fiber and fast-glycolytic fiber
-Most readily fatigues

Accepted Answer

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Question 3

During excitation-contraction coupling,

Accepted Answer

A) the action potential travels down the T tubules 
B) Ca₂₊ is released from the sarcoplasmic reticulum 
C) Ca₂₊ is taken up by the sarcoplasmic reticulum 
D) both a and b occur 
E) both a and c occur

Question 4

Considering muscles, bones, and joints as lever systems, a calculated "moment" for the load would be

Accepted Answer

A) force times load arm 
B) force times power arm 
C) load arm divided by force 
D) either a and b 
E) either b and c

Question 5

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

Accepted Answer

The answer of The immediate source for supplying additional ATP...

Question 6

Indicate which characteristic applies to the specific type of muscle contraction:
a.isometric
b.isotonic
c.eccentric
d.concentric
e.isometric and eccentric
f.isotonic and concentric
g.isotonic, eccentric, and concentric
-Tension remains constant

Accepted Answer

The answer of Indicate which characteristic applies to the specific...

Question 7

The metabolic process called ____________________ (a two-word answer) provides the most ATP molecules for use by muscle fibers contracting over a long period of time.

Accepted Answer

The answer of The metabolic process called ____________________ (a two-word...

Question 8

Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below:
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
-Regulatory protein(s)

Accepted Answer

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Question 9

Which of the following are involved in the regulation of cross bridge attachment activity?

Accepted Answer

A) calcium ions 
B) troponin 
C) tropomyosin 
D) all of the above 
E) only b and c

Question 10

Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below:
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
-Found in thick filament

Accepted Answer

The answer of Indicate which of the muscle proteins in...

Question 11

According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere.

Accepted Answer

A) True 
 B)False

Question 12

The muscle cells of a marathon runner's legs would exhibit all these characteristics except

Accepted Answer

A) high resistance to fatigue 
B) low myoglobin content 
C) low glycogen content 
D) many mitochondria 
E) slow speed of contraction

Question 13

The thick filaments within a myofibril have ATPase activity.

Accepted Answer

A) True 
 B)False

Question 14

In smooth muscle, Ca²⁺ binds with the protein ____________________, which is structurally similar to troponin.

Accepted Answer

The answer of In smooth muscle, Ca²⁺ binds with the...

Question 15

The first means by which ATP is produced at the onset of contractile activity is

Accepted Answer

A) transfer of energy and phosphate from creatine phosphate to ADP 
B) oxidative phosphorylation 
C) glycolysis 
D) degradation of myoglobin 
E) none of these

Question 16

Indicate which of the muscle proteins in skeletal muscle is associated with the item in question by writing the appropriate letters in the blanks using the answer code below:
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
-Form(s) a helical chain

Accepted Answer

The answer of Indicate which of the muscle proteins in...

Question 17

Slow-oxidative muscle fibers would be found in high density in the leg muscles of Olympic sprinters.

Accepted Answer

A) True 
 B)False

Question 18

Compare and contrast the different types of muscle contractions.Include the following in your answer: isotonic, concentric, eccentric, isometric, load, force, and tension.You may want to create a table as part of your answer.

Accepted Answer

The answer of Compare and contrast the different types of...

Question 19

During an isometric contraction, the muscle

Accepted Answer

A) maintains a constant tension 
B) shortens 
C) moves a body part 
D) maintains a constant length 
E) tension is greater than the load

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 8: Muscle Physiology

Indicate which characteristic applies to the specific type of muscle contraction: a.isometric b.isotonic c.eccentric d.concentric e.isometric and eccentric f.isotonic and concentric g.isotonic, eccentric, and concentric -Length changes

During excitation-contraction coupling,

Considering muscles, bones, and joints as lever systems, a calculated "moment" for the load would be

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

Indicate which characteristic applies to the specific type of muscle contraction: a.isometric b.isotonic c.eccentric d.concentric e.isometric and eccentric f.isotonic and concentric g.isotonic, eccentric, and concentric -Tension remains constant

The metabolic process called ____________________ (a two-word answer) provides the most ATP molecules for use by muscle fibers contracting over a long period of time.

Which of the following are involved in the regulation of cross bridge attachment activity?

According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere.

The muscle cells of a marathon runner's legs would exhibit all these characteristics except

The thick filaments within a myofibril have ATPase activity.

In smooth muscle, Ca²⁺ binds with the protein ____________________, which is structurally similar to troponin.

The first means by which ATP is produced at the onset of contractile activity is

Slow-oxidative muscle fibers would be found in high density in the leg muscles of Olympic sprinters.

Compare and contrast the different types of muscle contractions.Include the following in your answer: isotonic, concentric, eccentric, isometric, load, force, and tension.You may want to create a table as part of your answer.

During an isometric contraction, the muscle

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