Question 1

Which of these statements describes the corticospinal system

Accepted Answer

A) It consists of fibres that originate within the primary motor cortex and terminate on motor neurons. 
B) It involves the motor regions of the cortex, the cerebellum, the basal nuclei, and the thalamus. 
C) It is concerned primarily with regulation of overall body posture. 
D) It consists of fibres that originate within the parietal lobe and terminate on the posterior grey horn of the spinal cord. 
A) It consists of fibres that originate within the primary motor cortex and terminate on motor neurons. 
B) It involves the motor regions of the cortex, the cerebellum, the basal nuclei, and the thalamus. 
C) It is concerned primarily with regulation of overall body posture. 
D) It consists of fibres that originate within the parietal lobe and terminate on the posterior grey horn of the spinal cord.

Question 2

Muscles that have a fine degree of control have small motor units.

Accepted Answer

A) True 
 B)False

Question 3

For which of these purposes are stretch reflexes important

Accepted Answer

A) to maintain balance and posture 
B) to provide afferent information coordinating complex muscle activity 
C) to determine the level of tone 
D) to prevent of muscle injury 
A) to maintain balance and posture 
B) to provide afferent information coordinating complex muscle activity 
C) to determine the level of tone 
D) to prevent of muscle injury

Question 4

Which of these activities is involved in the process of muscle relaxation

Accepted Answer

A) Acetylcholinesterase promotes the concentration of acetylcholine to allow the muscle membrane to return to resting potential. 
B) Ca²⁺ is actively taken up by the lateral sacs of the sarcoplasmic reticulum when there is no longer a local action potential. 
C) The cross bridges from the thick filaments bind to the thin filaments and bend in such a way as to return the filaments to their original resting position. 
D) ATP becomes unavailable. 
A) Acetylcholinesterase promotes the concentration of acetylcholine to allow the muscle membrane to return to resting potential. 
B) Ca²⁺ is actively taken up by the lateral sacs of the sarcoplasmic reticulum when there is no longer a local action potential. 
C) The cross bridges from the thick filaments bind to the thin filaments and bend in such a way as to return the filaments to their original resting position. 
D) ATP becomes unavailable.

Question 5

In the body's lever systems, what are the fulcrums represented by

Accepted Answer

A) joints 
B) long bones 
C) tendons 
D) short bones 
A) joints 
B) long bones 
C) tendons 
D) short bones

Question 6

The ____________________ component is the noncontractile tissue part of a muscle.

Accepted Answer

The answer of The ____________________ component is the noncontractile tissue...

Question 7

How does an action potential spread rapidly to the central portions of a muscle cell

Accepted Answer

A) by means of the Z lines 
B) by means of the sarcoplasmic reticulum 
C) by means of the H zone 
D) by means of the T tubules 
A) by means of the Z lines 
B) by means of the sarcoplasmic reticulum 
C) by means of the H zone 
D) by means of the T tubules

Question 8

During the ____________________ stroke, cross bridges of myosin pull the actin filaments in the sarcomere.

Accepted Answer

The answer of During the ____________________ stroke, cross bridges of...

Question 9

Which of these statements describes a functional syncytium

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. 
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. 
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 10

Match the bands, labelled a. through c., with the descriptions. (Options may be used more than once or not at all.)
-remains the same size during muscle contraction

Accepted Answer

A) A band 
B) I band 
C) H zone 
A) A band 
B) I band 
C) H zone

Question 11

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
-found predominantly in muscles designed for endurance

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 12

For a(n) ____________________ isotonic contraction, the contraction resists the stretching of the muscle.

Accepted Answer

The answer of For a(n) ____________________ isotonic contraction, the contraction...

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

Joints serve as fulcrums for muscle action.

Accepted Answer

A) True 
 B)False

Question 15

Match the types of muscles, labelled a. and b., with the characteristics.
-important in maintaining posture

Accepted Answer

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

Question 16

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
-found predominantly in muscles adapted for short-duration, high-intensity activities

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 17

Which of these statements does NOT apply to different types of muscle fibres

Accepted Answer

A) The higher the ATPase activity, the faster the speed of contraction. 
B) Muscles that have high glycolytic capacity and large glycogen stores are more resistant to fatigue. 
C) Muscles with high ATP-synthesizing ability are more resistant to fatigue. 
D) Oxidative types of muscle fibres contain myoglobin. 
A) The higher the ATPase activity, the faster the speed of contraction. 
B) Muscles that have high glycolytic capacity and large glycogen stores are more resistant to fatigue. 
C) Muscles with high ATP-synthesizing ability are more resistant to fatigue. 
D) Oxidative types of muscle fibres contain myoglobin.

Question 18

Which of these events happens when an action potential reaches the presynaptic terminal of the motor neuron

Accepted Answer

A) Calcium is released inside the muscle fibre. 
B) Acetylcholine is released into the synaptic cleft. 
C) Acetylcholinesterase is released into the synaptic cleft. 
D) Physical contact between the motor neuron and the muscle fibre occurs. 
A) Calcium is released inside the muscle fibre. 
B) Acetylcholine is released into the synaptic cleft. 
C) Acetylcholinesterase is released into the synaptic cleft. 
D) Physical contact between the motor neuron and the muscle fibre occurs.

Question 19

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

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 20

Skeletal muscle fibres are formed during embryonic development by the fusion of many smaller cells.

Accepted Answer

A) True 
 B)False

Which of these statements describes the corticospinal system

Muscles that have a fine degree of control have small motor units.

For which of these purposes are stretch reflexes important

Which of these activities is involved in the process of muscle relaxation

In the body's lever systems, what are the fulcrums represented by

The ____________________ component is the noncontractile tissue part of a muscle.

How does an action potential spread rapidly to the central portions of a muscle cell

During the ____________________ stroke, cross bridges of myosin pull the actin filaments in the sarcomere.

Which of these statements describes a functional syncytium

Match the bands, labelled a. through c., with the descriptions. (Options may be used more than once or not at all.) -remains the same size during muscle contraction

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -found predominantly in muscles designed for endurance

For a(n) ____________________ isotonic contraction, the contraction resists the stretching of the muscle.

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

Joints serve as fulcrums for muscle action.

Match the types of muscles, labelled a. and b., with the characteristics. -important in maintaining posture

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -found predominantly in muscles adapted for short-duration, high-intensity activities

Which of these statements does NOT apply to different types of muscle fibres

Which of these events happens when an action potential reaches the presynaptic terminal of the motor neuron

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

Skeletal muscle fibres are formed during embryonic development by the fusion of many smaller cells.

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 describes the corticospinal system

Muscles that have a fine degree of control have small motor units.

For which of these purposes are stretch reflexes important

Which of these activities is involved in the process of muscle relaxation

In the body's lever systems, what are the fulcrums represented by

The ____________________ component is the noncontractile tissue part of a muscle.

How does an action potential spread rapidly to the central portions of a muscle cell

During the ____________________ stroke, cross bridges of myosin pull the actin filaments in the sarcomere.

Which of these statements describes a functional syncytium

Match the bands, labelled a. through c., with the descriptions. (Options may be used more than once or not at all.) -remains the same size during muscle contraction

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -found predominantly in muscles designed for endurance

For a(n) ____________________ isotonic contraction, the contraction resists the stretching of the muscle.

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

Joints serve as fulcrums for muscle action.

Match the types of muscles, labelled a. and b., with the characteristics. -important in maintaining posture

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) -found predominantly in muscles adapted for short-duration, high-intensity activities

Which of these statements does NOT apply to different types of muscle fibres

Which of these events happens when an action potential reaches the presynaptic terminal of the motor neuron

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

Skeletal muscle fibres are formed during embryonic development by the fusion of many smaller cells.

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