Question 1

Which of these methods is NOT a method of gradation of skeletal muscle contraction

Accepted Answer

A) twitch summation 
B) motor unit recruitment 
C) varying the number of motor units stimulated 
D) stimulating variable portions of each motor unit 
A) twitch summation 
B) motor unit recruitment 
C) varying the number of motor units stimulated 
D) stimulating variable portions of each motor unit

Question 2

Which of the following is NOT a normal, age-related change that occurs in muscles of older individuals

Accepted Answer

A) reduction in the number of fibres 
B) reduction in the size of the fibres 
C) large reduction in the blood supply 
D) reduction in adaptation to exercise 
A) reduction in the number of fibres 
B) reduction in the size of the fibres 
C) large reduction in the blood supply 
D) reduction in adaptation to exercise

Question 3

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.)
-found in the walls of hollow organs such as the stomach

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 4

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Accepted Answer

A) True 
 B)False

Question 5

Muscle tension does not develop in isometric contractions.

Accepted Answer

A) True 
 B)False

Question 6

Match the skeletal muscle proteins, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.)
-possess cross bridges

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 7

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
-hypertrophies in response to weight training

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 8

Which of these statements applies to eccentric muscle contractions

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 will vary throughout a range of motion. 
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 will vary throughout a range of motion.

Question 9

Rigor mortis occurs when Ca²⁺ links actin and the myosin globular head together in a rigor complex.

Accepted Answer

A) True 
 B)False

Question 10

The metabolic capability of a muscle fibre can affect the degree of tension it can develop.

Accepted Answer

A) True 
 B)False

Question 11

Rank the following 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 12

The contractile response of a muscle fibre to a single action potential is called a(n) ____________________.

Accepted Answer

The answer of The contractile response of a muscle fibre...

Question 13

In order for relaxation to occur, ACh must be removed from the muscle cell's receptors.

Accepted Answer

A) True 
 B)False

Question 14

____________________ are the intracellular signal for contraction.

Accepted Answer

The answer of ____________________ are the intracellular signal for contraction....

Question 15

In an isotonic contraction, only 25 percent of the energy consumed is realized as external work, and the remaining 75 percent is converted to heat.

Accepted Answer

A) True 
 B)False

Question 16

Which of these muscles have motor units with the highest innervation ratio

Accepted Answer

A) leg muscles 
B) arm muscles 
C) muscles of the trunk 
D) muscles that move the fingers 
A) leg muscles 
B) arm muscles 
C) muscles of the trunk 
D) muscles that move the fingers

Question 17

If you wanted to pick up something heavier than your pencil, you would need to have a stronger muscle contraction.Which of these actions might accomplish this

Accepted Answer

A) Stimulate more motor units. 
B) Decrease the frequency of stimulation to allow a more prolonged contraction to occur. 
C) Decrease the refractory period. 
D) Block acetylcholinesterase at the neuromuscular junction to allow acetylcholine to function longer. 
A) Stimulate more motor units. 
B) Decrease the frequency of stimulation to allow a more prolonged contraction to occur. 
C) Decrease the refractory period. 
D) Block acetylcholinesterase at the neuromuscular junction to allow acetylcholine to function longer.

Question 18

If the load on a muscle is increased, eventually a load will be reached, at which the velocity of shortening becomes zero.What is the term for the muscle contraction at this point

Accepted Answer

A) concentric 
B) eccentric 
C) isotonic 
D) isometric 
A) concentric 
B) eccentric 
C) isotonic 
D) isometric

Question 19

Which statement is characteristic of most of the body's lever systems

Accepted Answer

A) They work at mechanical advantage. 
B) They work at a mechanical disadvantage. 
C) Muscles must exert lesser forces than the load. 
D) Muscles must exert greater forces than the load. 
A) They work at mechanical advantage. 
B) They work at a mechanical disadvantage. 
C) Muscles must exert lesser forces than the load. 
D) Muscles must exert greater forces than the load.

Question 20

Which of these 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

Which of these methods is NOT a method of gradation of skeletal muscle contraction

Which of the following is NOT a normal, age-related change that occurs in muscles of older individuals

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) -found in the walls of hollow organs such as the stomach

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Muscle tension does not develop in isometric contractions.

Match the skeletal muscle proteins, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -possess cross bridges

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -hypertrophies in response to weight training

Which of these statements applies to eccentric muscle contractions

Rigor mortis occurs when Ca²⁺ links actin and the myosin globular head together in a rigor complex.

The metabolic capability of a muscle fibre can affect the degree of tension it can develop.

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

The contractile response of a muscle fibre to a single action potential is called a(n) ____________________.

In order for relaxation to occur, ACh must be removed from the muscle cell's receptors.

____________________ are the intracellular signal for contraction.

In an isotonic contraction, only 25 percent of the energy consumed is realized as external work, and the remaining 75 percent is converted to heat.

Which of these muscles have motor units with the highest innervation ratio

If you wanted to pick up something heavier than your pencil, you would need to have a stronger muscle contraction.Which of these actions might accomplish this

If the load on a muscle is increased, eventually a load will be reached, at which the velocity of shortening becomes zero.What is the term for the muscle contraction at this point

Which statement is characteristic of most of the body's lever systems

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

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System: Sensory, Autonomic, Somatic

Principles of Endocrinology: The Central Endocrine Glands

The Endocrine Glands

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

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Exam 7: Muscle Physiology

Which of these methods is NOT a method of gradation of skeletal muscle contraction

Which of the following is NOT a normal, age-related change that occurs in muscles of older individuals

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) -found in the walls of hollow organs such as the stomach

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Muscle tension does not develop in isometric contractions.

Match the skeletal muscle proteins, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -possess cross bridges

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -hypertrophies in response to weight training

Which of these statements applies to eccentric muscle contractions

Rigor mortis occurs when Ca²⁺ links actin and the myosin globular head together in a rigor complex.

The metabolic capability of a muscle fibre can affect the degree of tension it can develop.

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

The contractile response of a muscle fibre to a single action potential is called a(n) ____________________.

In order for relaxation to occur, ACh must be removed from the muscle cell's receptors.

____________________ are the intracellular signal for contraction.

In an isotonic contraction, only 25 percent of the energy consumed is realized as external work, and the remaining 75 percent is converted to heat.

Which of these muscles have motor units with the highest innervation ratio

If you wanted to pick up something heavier than your pencil, you would need to have a stronger muscle contraction.Which of these actions might accomplish this

If the load on a muscle is increased, eventually a load will be reached, at which the velocity of shortening becomes zero.What is the term for the muscle contraction at this point

Which statement is characteristic of most of the body's lever systems

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

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System: Sensory, Autonomic, Somatic

Principles of Endocrinology: The Central Endocrine Glands

The Endocrine Glands

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

The Reproductive System

Filters