Question 1

Match the types of muscles, labelled a. and b., with the characteristics.
-does not accomplish any work

Accepted Answer

A) isometric contraction 
B) isotonic contraction 
A) isometric contraction 
B) isotonic contraction

Question 2

Which of these statements describes the length-tension relationship of skeletal muscle

Accepted Answer

A) When a muscle is maximally stretched, it can develop the most tension upon contraction because the thin filaments can slide a maximal distance. 
B) Maximum tension can be developed if the muscle is at its shortest length at the onset of contraction. 
C) In the body, the relaxed length of a muscle occurs at its optimal length. 
D) When the initial length of a muscle prior to contraction becomes very short, tension is decreased during contraction. 
A) When a muscle is maximally stretched, it can develop the most tension upon contraction because the thin filaments can slide a maximal distance. 
B) Maximum tension can be developed if the muscle is at its shortest length at the onset of contraction. 
C) In the body, the relaxed length of a muscle occurs at its optimal length. 
D) When the initial length of a muscle prior to contraction becomes very short, tension is decreased during contraction.

Question 3

Which of these statements describes contraction in skeletal and smooth muscle

Accepted Answer

A) In skeletal muscle, calcium ion mediates changes in thin filaments that lead to cross-bridge activity; in smooth muscle, calcium ion mediates changes in thick filaments that lead to cross-bridge activity. 
B) In skeletal muscle, troponin and tropomyosin are regulatory proteins; in smooth muscle, troponin is the only regulatory protein on thick filaments. 
C) In skeletal muscle, calcium ion binds to troponin; in smooth muscle, calcium ion binds to calmodulin. 
D) In skeletal muscle, calcium ion binds to calmodulin; in smooth muscle, calcium ion binds to troponin. 
A) In skeletal muscle, calcium ion mediates changes in thin filaments that lead to cross-bridge activity; in smooth muscle, calcium ion mediates changes in thick filaments that lead to cross-bridge activity. 
B) In skeletal muscle, troponin and tropomyosin are regulatory proteins; in smooth muscle, troponin is the only regulatory protein on thick filaments. 
C) In skeletal muscle, calcium ion binds to troponin; in smooth muscle, calcium ion binds to calmodulin. 
D) In skeletal muscle, calcium ion binds to calmodulin; in smooth muscle, calcium ion binds to troponin.

Question 4

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
-contains only thin filaments

Accepted Answer

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

Question 5

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

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

Which of these statements describes intrafusal muscle fibres

Accepted Answer

A) They are supplied by alpha motor neurons. 
B) They are found within muscle cell membrane. 
C) They contain contractile elements. 
D) They contain sensory nerve endings that are activated by stretch. 
A) They are supplied by alpha motor neurons. 
B) They are found within muscle cell membrane. 
C) They contain contractile elements. 
D) They contain sensory nerve endings that are activated by stretch.

Question 7

Oxidative phosphorylation occurs within the mitochondria of muscle cells.

Accepted Answer

A) True 
 B)False

Question 8

All muscle-lever systems work at a mechanical disadvantage.

Accepted Answer

A) True 
 B)False

Question 9

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.)
-innervated by motor neurons

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 10

During aerobic exercise, what is the primary means by which ATP is produced for contractile activity

Accepted Answer

A) accumulation of creatine phosphate 
B) fermentation 
C) oxidative phosphorylation 
D) glycolysis 
A) accumulation of creatine phosphate 
B) fermentation 
C) oxidative phosphorylation 
D) glycolysis

Question 11

____________________ provides the most ATP molecules for use by muscle fibres contracting over a long period of time.

Accepted Answer

Oxidative

Question 12

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
-most readily fatigues

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 13

Which of these statements describes myosin

Accepted Answer

A) It is spherical in shape. 
B) It is the main structural component of the thin filaments. 
C) It is referred to as a contractile protein. 
D) It consists of four identical protein subunits. 
A) It is spherical in shape. 
B) It is the main structural component of the thin filaments. 
C) It is referred to as a contractile protein. 
D) It consists of four identical protein subunits.

Question 14

Slow-oxidative muscle fibres have high resistance to fatigue.

Accepted Answer

A) True 
 B)False

Question 15

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.)
-basis of contraction is cross-bridge interaction between actin and myosin

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 16

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.)
-considered to be involuntary

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 17

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
-contains only thick filaments

Accepted Answer

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

Question 18

Muscle cells are the only cell types that contain intracellular contractile proteins.

Accepted Answer

A) True 
 B)False

Question 19

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.)
-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 20

Which events involved in muscle cell contraction are sequenced in the correct order
1)Sodium channels open, allowing sodium to flow in.
2)Impulse reaches axon's synaptic knob.
3)ACh binds to receptors on sarcolemma.
4)Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis.
5)If enough sodium moves into the muscle cell, an impulse (action potential) develops.

Accepted Answer

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

Match the types of muscles, labelled a. and b., with the characteristics. -does not accomplish any work

Which of these statements describes the length-tension relationship of skeletal muscle

Which of these statements describes contraction in skeletal and smooth muscle

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -contains only thin filaments

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

Which of these statements describes intrafusal muscle fibres

Oxidative phosphorylation occurs within the mitochondria of muscle cells.

All muscle-lever systems work at a mechanical disadvantage.

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.) -innervated by motor neurons

During aerobic exercise, what is the primary means by which ATP is produced for contractile activity

____________________ provides the most ATP molecules for use by muscle fibres contracting over a long period of time.

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -most readily fatigues

Which of these statements describes myosin

Slow-oxidative muscle fibres have high resistance to fatigue.

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.) -basis of contraction is cross-bridge interaction between actin and myosin

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.) -considered to be involuntary

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -contains only thick filaments

Muscle cells are the only cell types that contain intracellular contractile proteins.

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.) -under voluntary control

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

Match the types of muscles, labelled a. and b., with the characteristics. -does not accomplish any work

Which of these statements describes the length-tension relationship of skeletal muscle

Which of these statements describes contraction in skeletal and smooth muscle

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -contains only thin filaments

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

Which of these statements describes intrafusal muscle fibres

Oxidative phosphorylation occurs within the mitochondria of muscle cells.

All muscle-lever systems work at a mechanical disadvantage.

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.) -innervated by motor neurons

During aerobic exercise, what is the primary means by which ATP is produced for contractile activity

____________________ provides the most ATP molecules for use by muscle fibres contracting over a long period of time.

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -most readily fatigues

Which of these statements describes myosin

Slow-oxidative muscle fibres have high resistance to fatigue.

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.) -basis of contraction is cross-bridge interaction between actin and myosin

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.) -considered to be involuntary

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -contains only thick filaments

Muscle cells are the only cell types that contain intracellular contractile proteins.

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.) -under voluntary control

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