Question 1

The functional unit of skeletal muscle is the myofibril.

Accepted Answer

A) True 
 B)False

Question 2

A(n)____________________ develops following sustained anaerobic activity of muscles.

Accepted Answer

The answer of A(n)____________________ develops following sustained anaerobic activity of...

Question 3

Fast-oxidative muscle fibres have a high concentration of mitochondria.

Accepted Answer

A) True 
 B)False

Question 4

The strength and rate of contraction of the heart can be influenced by the autonomic nervous system.

Accepted Answer

A) True 
 B)False

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).
-has (have)ATPase capacity

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 
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

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).
-requires a constant supply of oxygen

Accepted Answer

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

Question 7

Rank muscle cell components from largest to smallest.
1)troponin
2)myofibril
3)sarcomere
4)thin filament
5)muscle fibre

Accepted Answer

A)  3, 4, 1, 5, 2 
B)  1, 2, 3, 5, 4 
C)  5, 4 ,3 , 1, 2 
D)  5, 2, 3, 4, 1 
A)  3, 4, 1, 5, 2 
B)  1, 2, 3, 5, 4 
C)  5, 4 ,3 , 1, 2 
D)  5, 2, 3, 4, 1

Question 8

____________________ refers to the series of events linking muscle excitation to muscle contraction.

Accepted Answer

Excitation

Question 9

What is the function of tropomyosin?

Accepted Answer

A)  to bind Ca2+ 
B)  to form attachments with myosin cross bridges 
C)  to prevent myosin cross bridges from attaching to the thin filaments 
D)  to serve as an ATPase 
A)  to bind Ca2+ 
B)  to form attachments with myosin cross bridges 
C)  to prevent myosin cross bridges from attaching to the thin filaments 
D)  to serve as an ATPase

Question 10

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 the sarcomere

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 
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 11

Why are you able to repeatedly contract and relax your muscles of respiration,allowing you to breathe in and breathe out?

Accepted Answer

A)  As soon as all of the Ca2+stored in the lateral sacs of the sarcoplasmic reticulum is used up, muscle relaxation occurs. 
B)  After the muscle cell becomes excited, acetylcholinesterase maintains the action of acetylcholine. 
C)  When there is no longer a local action potential in the muscle cell, Ca2+ is actively transported back into the lateral sacs of the sarcoplasmic reticulum, and muscle relaxation occurs. 
D)  because ATP is not available soon after the contraction. 
A)  As soon as all of the Ca2+stored in the lateral sacs of the sarcoplasmic reticulum is used up, muscle relaxation occurs. 
B)  After the muscle cell becomes excited, acetylcholinesterase maintains the action of acetylcholine. 
C)  When there is no longer a local action potential in the muscle cell, Ca2+ is actively transported back into the lateral sacs of the sarcoplasmic reticulum, and muscle relaxation occurs. 
D)  because ATP is not available soon after the contraction.

Question 12

What initiates contraction of smooth muscle?

Accepted Answer

A)  stimulation by motor neurons 
B)  inhibition of acetylcholinesterase 
C)  membrane potential drifting to threshold as a result of automatic changes in ion movement across the membrane 
D)  excitation of the gap junctions by transmitter substance 
A)  stimulation by motor neurons 
B)  inhibition of acetylcholinesterase 
C)  membrane potential drifting to threshold as a result of automatic changes in ion movement across the membrane 
D)  excitation of the gap junctions by transmitter substance

Question 13

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 14

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).
-under voluntary control

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 
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 15

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

Accepted Answer

A)  transfer of energy and phosphate from creatine phosphate to ADP 
B)  oxidative phosphorylation 
C)  glycolysis 
D)  degradation of myoglobin 
A)  transfer of energy and phosphate from creatine phosphate to ADP 
B)  oxidative phosphorylation 
C)  glycolysis 
D)  degradation of myoglobin

Question 16

Which statement concerning a functional syncytium is correct?

Accepted Answer

A)  It is a pair of agonist muscles that function together to move a joint. 
B)  It can be excited to contract as a unit because action potentials can be conducted from one cell to adjacent cells through gap junctions. 
C)  It is a functional junction between a smooth muscle fibre and an autonomic nerve ending. 
D)  It refers to the muscle at the base of hair follicles. 
A)  It is a pair of agonist muscles that function together to move a joint. 
B)  It can be excited to contract as a unit because action potentials can be conducted from one cell to adjacent cells through gap junctions. 
C)  It is a functional junction between a smooth muscle fibre and an autonomic nerve ending. 
D)  It refers to the muscle at the base of hair follicles.

Question 17

The skeletal muscle shortens during concentric,isotonic contraction.

Accepted Answer

A) True 
 B)False

Question 18

Indicate the characteristics of the muscle-tension receptors by using the answer code (options may be used more than once or not at all).
-provides information to motor regions of the brain

Accepted Answer

A) muscle spindle 
B) Golgi tendon organ 
C) both of these receptors 
A) muscle spindle 
B) Golgi tendon organ 
C) both of these receptors

Question 19

Which characteristics would NOT be exhibited in the muscle cells of a marathon runner's legs?

Accepted Answer

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

Question 20

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).
-form(s)a helical chain

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 
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

The functional unit of skeletal muscle is the myofibril.

A(n)____________________ develops following sustained anaerobic activity of muscles.

Fast-oxidative muscle fibres have a high concentration of mitochondria.

The strength and rate of contraction of the heart can be influenced by the autonomic nervous system.

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). -has (have)ATPase capacity

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). -requires a constant supply of oxygen

Rank muscle cell components from largest to smallest. 1)troponin 2)myofibril 3)sarcomere 4)thin filament 5)muscle fibre

____________________ refers to the series of events linking muscle excitation to muscle contraction.

What is the function of tropomyosin?

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 the sarcomere

Why are you able to repeatedly contract and relax your muscles of respiration,allowing you to breathe in and breathe out?

What initiates contraction of smooth muscle?

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

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). -under voluntary control

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

Which statement concerning a functional syncytium is correct?

The skeletal muscle shortens during concentric,isotonic contraction.

Indicate the characteristics of the muscle-tension receptors by using the answer code (options may be used more than once or not at all). -provides information to motor regions of the brain

Which characteristics would NOT be exhibited in the muscle cells of a marathon runner's legs?

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). -form(s)a helical chain

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine Glands

The Reproductive System

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Exam 6: Muscle Physiology

The functional unit of skeletal muscle is the myofibril.

A(n)____________________ develops following sustained anaerobic activity of muscles.

Fast-oxidative muscle fibres have a high concentration of mitochondria.

The strength and rate of contraction of the heart can be influenced by the autonomic nervous system.

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). -has (have)ATPase capacity

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). -requires a constant supply of oxygen

Rank muscle cell components from largest to smallest. 1)troponin 2)myofibril 3)sarcomere 4)thin filament 5)muscle fibre

____________________ refers to the series of events linking muscle excitation to muscle contraction.

What is the function of tropomyosin?

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 the sarcomere

Why are you able to repeatedly contract and relax your muscles of respiration,allowing you to breathe in and breathe out?

What initiates contraction of smooth muscle?

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

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). -under voluntary control

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

Which statement concerning a functional syncytium is correct?

The skeletal muscle shortens during concentric,isotonic contraction.

Indicate the characteristics of the muscle-tension receptors by using the answer code (options may be used more than once or not at all). -provides information to motor regions of the brain

Which characteristics would NOT be exhibited in the muscle cells of a marathon runner's legs?

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). -form(s)a helical chain

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine Glands

The Reproductive System

Filters