Question 1

Which of these statements does NOT apply to cardiac muscle

Accepted Answer

A) contains gap junctions 
B) found only in the heart 
C) self-excitable 
D) lacks tropomyosin 
A) contains gap junctions 
B) found only in the heart 
C) self-excitable 
D) lacks tropomyosin

Question 2

Summation events result from increasing amounts of cytoplasmic calcium levels.

Accepted Answer

A) True 
 B)False

Question 3

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

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 4

Which of these statements applies to gap junctions

Accepted Answer

A) They allow action potentials to spread from cell to cell. 
B) They are the junctions between the muscle fibres within a motor unit. 
C) They are found only in smooth muscle. 
D) They are the junctions between the autonomic nervous system and smooth muscle cells. 
A) They allow action potentials to spread from cell to cell. 
B) They are the junctions between the muscle fibres within a motor unit. 
C) They are found only in smooth muscle. 
D) They are the junctions between the autonomic nervous system and smooth muscle cells.

Question 5

Which of these statements describes 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) A high level of calcium ion is not required. 
D) It results from increasing the frequency at which motor units are firing within a muscle. 
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) A high level of calcium ion is not required. 
D) It results from increasing the frequency at which motor units are firing within a muscle.

Question 6

Which of these statements describes foot proteins

Accepted Answer

A) They span the gap between a lateral sac of the sarcoplasmic reticulum and the cell membrane. 
B) They are believed to serve as Ca²⁺ channels. 
C) They project from the thick filaments, bind to the thin filaments, and subsequently bend to pull the thin filaments inward toward the A band's centre during muscle contraction. 
D) Each contains two subunits arranged in a specific pattern. 
A) They span the gap between a lateral sac of the sarcoplasmic reticulum and the cell membrane. 
B) They are believed to serve as Ca²⁺ channels. 
C) They project from the thick filaments, bind to the thin filaments, and subsequently bend to pull the thin filaments inward toward the A band's centre during muscle contraction. 
D) Each contains two subunits arranged in a specific pattern.

Question 7

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

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 8

Which of the following is the first step in excitation-contraction coupling

Accepted Answer

A) Exposed actin sites bind with myosin cross bridges. 
B) Troponin binds calcium. 
C) Calcium is released from the sarcoplasmic reticulum. 
D) Sodium channels open in the fibre's membrane. 
A) Exposed actin sites bind with myosin cross bridges. 
B) Troponin binds calcium. 
C) Calcium is released from the sarcoplasmic reticulum. 
D) Sodium channels open in the fibre's membrane.

Question 9

Match the muscle-tension receptors, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
-detects change in muscle tension

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 10

Describe how summations occur in muscle cells.

Accepted Answer

Summations in muscle cells occur when mu

Question 11

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.)
-contain(s) T tubules

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 12

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

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 13

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
-has abundant glycolytic enzymes

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 14

The T tubule ranges transversely to the surface of the muscle cell membrane.

Accepted Answer

A) True 
 B)False

Question 15

Which of these statements applies to T tubules

Accepted Answer

A) They form the Z lines. 
B) They store Ca²⁺. 
C) They provide a means of rapidly transmitting the action potential to the central portions of the muscle fibre. 
D) They allow for nutrients to be carried into the cell. 
A) They form the Z lines. 
B) They store Ca²⁺. 
C) They provide a means of rapidly transmitting the action potential to the central portions of the muscle fibre. 
D) They allow for nutrients to be carried into the cell.

Question 16

Which of the following is a characteristic feature of isometric muscle contractions

Accepted Answer

A) They occur at constant tension. 
B) The muscle shortens. 
C) They are used for body movements. 
D) They occur at constant length. 
A) They occur at constant tension. 
B) The muscle shortens. 
C) They are used for body movements. 
D) They occur at constant length.

Question 17

Oxygen debt is the oxygen a skeletal muscle produces or pays off when it carries out glycolysis.

Accepted Answer

A) True 
 B)False

Question 18

Which of these compounds binds with the calcium that enters the cell during smooth muscle excitation

Accepted Answer

A) calmodulin 
B) inactive myosin kinase 
C) troponin 
D) myosin 
A) calmodulin 
B) inactive myosin kinase 
C) troponin 
D) myosin

Question 19

Tetanus occurs when a muscle fibre is stimulated so rapidly that it is not allowed to relax between stimulations, resulting in a smooth, sustained contraction.

Accepted Answer

A) True 
 B)False

Question 20

For every muscle, there is an optimal length at which maximum ____________________ is achieved.

Accepted Answer

The answer of For every muscle, there is an optimal...

Which of these statements does NOT apply to cardiac muscle

Summation events result from increasing amounts of cytoplasmic calcium levels.

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

Which of these statements applies to gap junctions

Which of these statements describes twitch summation

Which of these statements describes foot proteins

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

Which of the following is the first step in excitation-contraction coupling

Match the muscle-tension receptors, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -detects change in muscle tension

Describe how summations occur in muscle cells.

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.) -contain(s) T tubules

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

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -has abundant glycolytic enzymes

The T tubule ranges transversely to the surface of the muscle cell membrane.

Which of these statements applies to T tubules

Which of the following is a characteristic feature of isometric muscle contractions

Oxygen debt is the oxygen a skeletal muscle produces or pays off when it carries out glycolysis.

Which of these compounds binds with the calcium that enters the cell during smooth muscle excitation

Tetanus occurs when a muscle fibre is stimulated so rapidly that it is not allowed to relax between stimulations, resulting in a smooth, sustained contraction.

For every muscle, there is an optimal length at which maximum ____________________ is achieved.

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

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Exam 7: Muscle Physiology

Which of these statements does NOT apply to cardiac muscle

Summation events result from increasing amounts of cytoplasmic calcium levels.

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

Which of these statements applies to gap junctions

Which of these statements describes twitch summation

Which of these statements describes foot proteins

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

Which of the following is the first step in excitation-contraction coupling

Match the muscle-tension receptors, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -detects change in muscle tension

Describe how summations occur in muscle cells.

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.) -contain(s) T tubules

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

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -has abundant glycolytic enzymes

The T tubule ranges transversely to the surface of the muscle cell membrane.

Which of these statements applies to T tubules

Which of the following is a characteristic feature of isometric muscle contractions

Oxygen debt is the oxygen a skeletal muscle produces or pays off when it carries out glycolysis.

Which of these compounds binds with the calcium that enters the cell during smooth muscle excitation

Tetanus occurs when a muscle fibre is stimulated so rapidly that it is not allowed to relax between stimulations, resulting in a smooth, sustained contraction.

For every muscle, there is an optimal length at which maximum ____________________ is achieved.

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