Question 1

In a state of ____________________, a muscle cannot maintain any kind of tension.

Accepted Answer

The answer of In a state of ____________________, a muscle...

Question 2

Which of these components are involved with regulation of cross-bridge attachment activity

Accepted Answer

A) calcium ions and troponin 
B) troponin and titin 
C) tropomyosin and calmodulin 
D) titin only 
A) calcium ions and troponin 
B) troponin and titin 
C) tropomyosin and calmodulin 
D) titin only

Question 3

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
-runs down the middle of the I band

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 4

Muscle fibres are some of the longest cells in the body.How long can they be

Accepted Answer

A) 1-2 ìm 
B) 2-4 ìm 
C) 10-100 ìm 
D) 500-1000 ìm 
A) 1-2 ìm 
B) 2-4 ìm 
C) 10-100 ìm 
D) 500-1000 ìm

Question 5

What are the means by which skeletal muscle fibres utilize energy for contraction

Accepted Answer

Skeletal muscle fibers contract through

Question 6

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 heart

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 7

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.)
-striated

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 8

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
-runs down the middle of the A band

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 9

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

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

Ligaments attach muscles to bones.

Accepted Answer

A) True 
 B)False

Question 11

A single muscle cell is known as a myofibril.

Accepted Answer

A) True 
 B)False

Question 12

Which of these statements describes fast glycolytic (type IIb) fibres

Accepted Answer

A) They contain an abundance of mitochondria. 
B) The muscle fibre diameter is small. 
C) They are most abundant in muscles specialized for maintaining low-intensity contractions for long periods of time without fatigue. 
D) They can be converted into fast oxidative fibres by regular endurance activities. 
A) They contain an abundance of mitochondria. 
B) The muscle fibre diameter is small. 
C) They are most abundant in muscles specialized for maintaining low-intensity contractions for long periods of time without fatigue. 
D) They can be converted into fast oxidative fibres by regular endurance activities.

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

The actin filaments in sarcomere contain cross bridges.

Accepted Answer

A) True 
 B)False

Question 15

Which of these factors causes muscle relaxation

Accepted Answer

A) addition of magnesium to muscle cells 
B) ACh hyperactivity 
C) return of calcium to lateral sacs 
D) lack of ATP 
A) addition of magnesium to muscle cells 
B) ACh hyperactivity 
C) return of calcium to lateral sacs 
D) lack of ATP

Question 16

____________________ is the pigment that can store small amounts of oxygen in the skeletal muscle.

Accepted Answer

The answer of ____________________ is the pigment that can store...

Question 17

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.)
-attached to bones

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 18

Which molecule binds ATP in order for muscle contraction to occur

Accepted Answer

A) tropomyosin 
B) actin 
C) myosin 
D) calcium 
A) tropomyosin 
B) actin 
C) myosin 
D) calcium

Question 19

Gradation of muscle contraction can be accomplished by stimulating variable portions of each motor unit.

Accepted Answer

A) True 
 B)False

Question 20

Which of these events happens during excitation-contraction coupling

Accepted Answer

A) The action potential travels down the thin myofilaments. 
B) Ca²⁺ is released from the sarcoplasmic reticulum. 
C) Ca²⁺ is taken up by the sarcoplasmic reticulum. 
D) Calcium blocks the binding sites on the actin molecules. 
A) The action potential travels down the thin myofilaments. 
B) Ca²⁺ is released from the sarcoplasmic reticulum. 
C) Ca²⁺ is taken up by the sarcoplasmic reticulum. 
D) Calcium blocks the binding sites on the actin molecules.

In a state of ____________________, a muscle cannot maintain any kind of tension.

Which of these components are involved with regulation of cross-bridge attachment activity

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -runs down the middle of the I band

Muscle fibres are some of the longest cells in the body.How long can they be

What are the means by which skeletal muscle fibres utilize energy for contraction

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 heart

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.) -striated

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -runs down the middle of the A band

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

Ligaments attach muscles to bones.

A single muscle cell is known as a myofibril.

Which of these statements describes fast glycolytic (type IIb) fibres

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

The actin filaments in sarcomere contain cross bridges.

Which of these factors causes muscle relaxation

____________________ is the pigment that can store small amounts of oxygen in the skeletal muscle.

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.) -attached to bones

Which molecule binds ATP in order for muscle contraction to occur

Gradation of muscle contraction can be accomplished by stimulating variable portions of each motor unit.

Which of these events happens during excitation-contraction coupling

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

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The Blood

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Fluid and Acidbase Balance

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Exam 7: Muscle Physiology

In a state of ____________________, a muscle cannot maintain any kind of tension.

Which of these components are involved with regulation of cross-bridge attachment activity

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -runs down the middle of the I band

Muscle fibres are some of the longest cells in the body.How long can they be

What are the means by which skeletal muscle fibres utilize energy for contraction

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 heart

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.) -striated

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -runs down the middle of the A band

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

Ligaments attach muscles to bones.

A single muscle cell is known as a myofibril.

Which of these statements describes fast glycolytic (type IIb) fibres

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

The actin filaments in sarcomere contain cross bridges.

Which of these factors causes muscle relaxation

____________________ is the pigment that can store small amounts of oxygen in the skeletal muscle.

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.) -attached to bones

Which molecule binds ATP in order for muscle contraction to occur

Gradation of muscle contraction can be accomplished by stimulating variable portions of each motor unit.

Which of these events happens during excitation-contraction coupling

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