Question 1

Which of these factors is involved in the gradation of muscle contraction?

Accepted Answer

A) greater number of muscle fibres 
B) variation in the frequency of action potentials initiated in each muscle fibre 
C)  variation in the size of the action potentials initiated in each muscle fibre 
D)  variation in the distance action potentials can travel 
A) greater number of muscle fibres 
B) variation in the frequency of action potentials initiated in each muscle fibre 
C)  variation in the size of the action potentials initiated in each muscle fibre 
D)  variation in the distance action potentials can travel

Question 2

Which of these statements correctly describes muscle tension?

Accepted Answer

A) It is created during muscle contraction as the tension generated by the contractile elements is transmitted via the connective tissue and tendons to the bones. 
B) It is the force exerted on a muscle by the weight of an object. 
C)  It is greater than the load tension during an isometric contraction. 
D)  It is less than the load tension during isometric contraction. 
A) It is created during muscle contraction as the tension generated by the contractile elements is transmitted via the connective tissue and tendons to the bones. 
B) It is the force exerted on a muscle by the weight of an object. 
C)  It is greater than the load tension during an isometric contraction. 
D)  It is less than the load tension during isometric contraction.

Question 3

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
a.Z line
b.A band
c.I band
d.H zone
-joins adjacent sarcomeres together

Accepted Answer

The answer of Match the sarcomere components, labelled a. through...

Question 4

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.)
a.slow-oxidative fibre
b.fast-oxidative fibre
c.fast-glycolytic fibre
-contains considerable myoglobin

Accepted Answer

The answer of Match the muscle fibre types, labelled a....

Question 5

Which of the following statements is NOT characteristic of cross bridges?

Accepted Answer

A) They are a component of thin filaments. 
B) They are composed of myosin. 
C)  They have an actin binding site. 
D)  They have an ATPase binding site. 
A) They are a component of thin filaments. 
B) They are composed of myosin. 
C)  They have an actin binding site. 
D)  They have an ATPase binding site.

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.)
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
-found in the sarcomere

Accepted Answer

The answer of Match the skeletal muscle proteins, labelled a....

Question 7

Match the types of muscles, labelled a. and b., with the characteristics.
a.isometric contraction
b.isotonic contraction
-length remains constant

Accepted Answer

The answer of Match the types of muscles, labelled a....

Question 8

The ____________________ is the descending motor pathway that mediates performance of fine, discrete voluntary movements of the hands.

Accepted Answer

corticospi

Question 9

Foot proteins link the actin molecules together within a thin filament.

Accepted Answer

A) True 
 B)False

Question 10

Which of these statements correctly 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 11

Thin and thick filaments overlap in the A band.

Accepted Answer

A) True 
 B)False

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.)
a.slow-oxidative fibre
b.fast-oxidative fibre
c.fast-glycolytic fibre
-hypertrophies in response to weight training

Accepted Answer

The answer of Match the muscle fibre types, labelled a....

Question 13

____________________ proteins are calcium-release channels in the muscle cell.

Accepted Answer

The answer of ____________________ proteins are calcium-release channels in the...

Question 14

Which of the following characteristics are shared by all three types of muscle tissues?

Accepted Answer

A) contains myosin and actin 
B) neurogenic 
C)  striated 
D)  considered to be under voluntary control 
A) contains myosin and actin 
B) neurogenic 
C)  striated 
D)  considered to be under voluntary control

Question 15

What can activate the stretch receptors in the central portion of the muscle spindle?

Accepted Answer

A) passive stretch of the skin overlying the muscle 
B) contraction of the central portions of the muscle fibre 
C)  gamma motor neuron stimulation 
D)  an alpha motor neuron 
A) passive stretch of the skin overlying the muscle 
B) contraction of the central portions of the muscle fibre 
C)  gamma motor neuron stimulation 
D)  an alpha motor neuron

Question 16

Compare and contrast isotonic versus isometric contractions.

Accepted Answer

The answer of Compare and contrast isotonic versus isometric contractions....

Question 17

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 18

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
a.Z line
b.A band
c.I band
d.H zone
-contains only thick filaments

Accepted Answer

The answer of Match the sarcomere components, labelled a. through...

Question 19

Which of these types of muscle cells are NOT capable of spontaneous depolarization?

Accepted Answer

A) single-unit smooth muscle cells 
B) multiunit smooth muscle and skeletal muscle cells 
C)  cardiac muscle and skeletal muscle cells 
D)  single-unit smooth muscle and multiunit smooth muscle cells 
A) single-unit smooth muscle cells 
B) multiunit smooth muscle and skeletal muscle cells 
C)  cardiac muscle and skeletal muscle cells 
D)  single-unit smooth muscle and multiunit smooth muscle cells

Question 20

Which of these statements correctly describes a motor unit?

Accepted Answer

A) a single motor neuron plus all the muscle fibres it innervates 
B) a single muscle fibre plus all the motor neurons that innervate it 
C)  all the motor neurons supplying a single muscle 
D)  one pair of antagonistic muscles 
A) a single motor neuron plus all the muscle fibres it innervates 
B) a single muscle fibre plus all the motor neurons that innervate it 
C)  all the motor neurons supplying a single muscle 
D)  one pair of antagonistic muscles

Which of these factors is involved in the gradation of muscle contraction?

Which of these statements correctly describes muscle tension?

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) a.Z line b.A band c.I band d.H zone -joins adjacent sarcomeres together

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) a.slow-oxidative fibre b.fast-oxidative fibre c.fast-glycolytic fibre -contains considerable myoglobin

Which of the following statements is NOT characteristic of cross bridges?

Match the types of muscles, labelled a. and b., with the characteristics. a.isometric contraction b.isotonic contraction -length remains constant

The ____________________ is the descending motor pathway that mediates performance of fine, discrete voluntary movements of the hands.

Foot proteins link the actin molecules together within a thin filament.

Which of these statements correctly describes the corticospinal system?

Thin and thick filaments overlap in the A band.

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

____________________ proteins are calcium-release channels in the muscle cell.

Which of the following characteristics are shared by all three types of muscle tissues?

What can activate the stretch receptors in the central portion of the muscle spindle?

Compare and contrast isotonic versus isometric contractions.

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

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) a.Z line b.A band c.I band d.H zone -contains only thick filaments

Which of these types of muscle cells are NOT capable of spontaneous depolarization?

Which of these statements correctly describes a motor unit?

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

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Exam 6: The Peripheral Nervous System: Afferent Division; Special Senses

Which of these factors is involved in the gradation of muscle contraction?

Which of these statements correctly describes muscle tension?

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) a.Z line b.A band c.I band d.H zone -joins adjacent sarcomeres together

Match the muscle fibre types, labelled a. through c., with the characteristics. (Options may be used more than once or not at all.) a.slow-oxidative fibre b.fast-oxidative fibre c.fast-glycolytic fibre -contains considerable myoglobin

Which of the following statements is NOT characteristic of cross bridges?

Match the types of muscles, labelled a. and b., with the characteristics. a.isometric contraction b.isotonic contraction -length remains constant

The ____________________ is the descending motor pathway that mediates performance of fine, discrete voluntary movements of the hands.

Foot proteins link the actin molecules together within a thin filament.

Which of these statements correctly describes the corticospinal system?

Thin and thick filaments overlap in the A band.

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

____________________ proteins are calcium-release channels in the muscle cell.

Which of the following characteristics are shared by all three types of muscle tissues?

What can activate the stretch receptors in the central portion of the muscle spindle?

Compare and contrast isotonic versus isometric contractions.

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

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) a.Z line b.A band c.I band d.H zone -contains only thick filaments

Which of these types of muscle cells are NOT capable of spontaneous depolarization?

Which of these statements correctly describes a motor unit?

Introduction to Physiology and Homeostasis

Cell Physiology

The Plasma Membrane and Membrane Potential

Principles of Neural and Hormonal Communication

The Central Nervous System

The Peripheral Nervous System: Efferent Division

Muscle Physiology

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acidbase Balance

The Digestive System

Energy Balance and Temperature Regulation

Filters