Question 1

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Accepted Answer

A) True 
 B)False

Question 2

Match sarcomere component with correct characteristic.
-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 3

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below:
-Maintains a constant resting membrane potential unless stimulated.

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 4

A motor unit has a small number of muscle fibers. Which of the following would likely be true of this motor unit. It:

Accepted Answer

A)  is can produce a great amount of forces 
B)  is associated with muscles of the lower back 
C)  is involved in delicate contractions 
D)  has companion motor units that likely have many muscle fibers 
E)  is a sheet of smooth muscle cells connected by gap junctions. 
A)  is can produce a great amount of forces 
B)  is associated with muscles of the lower back 
C)  is involved in delicate contractions 
D)  has companion motor units that likely have many muscle fibers 
E)  is a sheet of smooth muscle cells connected by gap junctions.

Question 5

Match muscle type with correct characteristics.
-cardiac muscle

Accepted Answer

A) voluntary, neurogenic, and striated 
B) voluntary, neurogenic, and nonstriated 
C) involuntary, myogenic, and striated 
D) involuntary, neurogenic and nonstriated 
E) involuntary, myogenic, and nonstriated 
A) voluntary, neurogenic, and striated 
B) voluntary, neurogenic, and nonstriated 
C) involuntary, myogenic, and striated 
D) involuntary, neurogenic and nonstriated 
E) involuntary, myogenic, and nonstriated

Question 6

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below:
-Behaves as a functional syncytium.

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

The ____________________ is a modified endoplasmic reticulum within muscle.

Accepted Answer

sarcoplasm

Question 8

What is responsible for initiating contraction of smooth muscle?

Accepted Answer

A)  stimulation by motor neurons 
B)  inhibition of acetylcholinesterase 
C)  membrane potential drifting to threshold as a result of automatic changes in ion movement across the membrane 
D)  excitation of the gap junctions by transmitter substance 
E)  stimulation by the autonomic nervous system 
A)  stimulation by motor neurons 
B)  inhibition of acetylcholinesterase 
C)  membrane potential drifting to threshold as a result of automatic changes in ion movement across the membrane 
D)  excitation of the gap junctions by transmitter substance 
E)  stimulation by the autonomic nervous system

Question 9

The contractile tissues of muscle are referred to as the "series-elastic component."

Accepted Answer

A) True 
 B)False

Question 10

Which of the following properties characterize fast-oxidative muscle fibers?

Accepted Answer

A)  high myosin-ATPase activity 
B)  low myosin-ATPase activity 
C)  low oxidative capacity 
D)  both high myosin-ATPase activity and low oxidative capacity are correct. 
E)  both low myosin-ATPase activity and low oxidative capacity. 
A)  high myosin-ATPase activity 
B)  low myosin-ATPase activity 
C)  low oxidative capacity 
D)  both high myosin-ATPase activity and low oxidative capacity are correct. 
E)  both low myosin-ATPase activity and low oxidative capacity.

Question 11

The muscle cells of a marathon runner's legs would exhibit all these characteristics except

Accepted Answer

A)  high resistance to fatigue. 
B)  low myoglobin content. 
C)  low glycogen content. 
D)  many mitochondria. 
E)  slow speed of contraction. 
A)  high resistance to fatigue. 
B)  low myoglobin content. 
C)  low glycogen content. 
D)  many mitochondria. 
E)  slow speed of contraction.

Question 12

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below:
-Thick and thin filaments are highly organized into a banding pattern.

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 13

A patient shows flaccid paralysis of both legs. You can conclude damage occurred in which are of the nervous system?

Accepted Answer

A)  frontal lobe 
B)  parietal lobe 
C)  cerebellum 
D)  basal nuclei 
E)  spinal cord 
A)  frontal lobe 
B)  parietal lobe 
C)  cerebellum 
D)  basal nuclei 
E)  spinal cord

Question 14

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below:
-Myosin must be phosphorylated before it can bind with actin.

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 15

Which of the following is involved in the gradation of muscle contraction?

Accepted Answer

A)  variation in the number of motor units activated 
B)  variation in the frequency of action potentials initiated in each muscle fiber 
C)  variation in the size of the action potentials initiated in each muscle fiber 
D)  both (a) and (b) above. 
E)  all of these answers. 
A)  variation in the number of motor units activated 
B)  variation in the frequency of action potentials initiated in each muscle fiber 
C)  variation in the size of the action potentials initiated in each muscle fiber 
D)  both (a) and (b) above. 
E)  all of these answers.

Question 16

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

Accepted Answer

A)  creatine phosphate. 
B)  fermentation. 
C)  oxidative phosphorylation. 
D)  glycolysis. 
E)  myoglobin. 
A)  creatine phosphate. 
B)  fermentation. 
C)  oxidative phosphorylation. 
D)  glycolysis. 
E)  myoglobin.

Question 17

Indicate which characteristic applies to which type of muscle.
-Load exceeds muscle tension.

Accepted Answer

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

Question 18

_______ motor neurons innervate skeletal muscle to produce the main contraction whereas _________ motor neurons innervate muscle spindles to maintain their length.

Accepted Answer

The answer of _______ motor neurons innervate skeletal muscle to...

Question 19

Match sarcomere component with correct characteristic.
-Dark 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 20

In twitch summation,

Accepted Answer

A)  the muscle fiber is stimulated again before the action potential has returned to resting potential. 
B)  the muscle fiber is stimulated again before the filaments have completely returned to their resting position. 
C)  stronger muscle contractions occur but stronger action potentials do not occur. 
D)  both (b) and (c) above. 
E)  all of these answers. 
A)  the muscle fiber is stimulated again before the action potential has returned to resting potential. 
B)  the muscle fiber is stimulated again before the filaments have completely returned to their resting position. 
C)  stronger muscle contractions occur but stronger action potentials do not occur. 
D)  both (b) and (c) above. 
E)  all of these answers.

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Match sarcomere component with correct characteristic. -Runs down the middle of the A band.

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Maintains a constant resting membrane potential unless stimulated.

A motor unit has a small number of muscle fibers. Which of the following would likely be true of this motor unit. It:

Match muscle type with correct characteristics. -cardiac muscle

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Behaves as a functional syncytium.

The ____________________ is a modified endoplasmic reticulum within muscle.

What is responsible for initiating contraction of smooth muscle?

The contractile tissues of muscle are referred to as the "series-elastic component."

Which of the following properties characterize fast-oxidative muscle fibers?

The muscle cells of a marathon runner's legs would exhibit all these characteristics except

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Thick and thin filaments are highly organized into a banding pattern.

A patient shows flaccid paralysis of both legs. You can conclude damage occurred in which are of the nervous system?

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Myosin must be phosphorylated before it can bind with actin.

Which of the following is involved in the gradation of muscle contraction?

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

Indicate which characteristic applies to which type of muscle. -Load exceeds muscle tension.

_ motor neurons innervate skeletal muscle to produce the main contraction whereas ___ motor neurons innervate muscle spindles to maintain their length.

Match sarcomere component with correct characteristic. -Dark band.

In twitch summation,

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: Afferent Division and Special Senses

The Peripheral Nervous System: Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood and Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine System

The Reproductive System

Filters

Exam 8: Muscle Physiology

The M line is formed by a flattened disc-like cytoskeletal protein that connects the thin filaments of two adjoining sarcomeres.

Match sarcomere component with correct characteristic. -Runs down the middle of the A band.

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Maintains a constant resting membrane potential unless stimulated.

A motor unit has a small number of muscle fibers. Which of the following would likely be true of this motor unit. It:

Match muscle type with correct characteristics. -cardiac muscle

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Behaves as a functional syncytium.

The ____________________ is a modified endoplasmic reticulum within muscle.

What is responsible for initiating contraction of smooth muscle?

The contractile tissues of muscle are referred to as the "series-elastic component."

Which of the following properties characterize fast-oxidative muscle fibers?

The muscle cells of a marathon runner's legs would exhibit all these characteristics except

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Thick and thin filaments are highly organized into a banding pattern.

A patient shows flaccid paralysis of both legs. You can conclude damage occurred in which are of the nervous system?

Indicate which type of muscle is associated with the property in question by writing the appropriate letter in the blank using the answer code below: -Myosin must be phosphorylated before it can bind with actin.

Which of the following is involved in the gradation of muscle contraction?

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

Indicate which characteristic applies to which type of muscle. -Load exceeds muscle tension.

_______ motor neurons innervate skeletal muscle to produce the main contraction whereas _________ motor neurons innervate muscle spindles to maintain their length.

Match sarcomere component with correct characteristic. -Dark band.

In twitch summation,

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: Afferent Division and Special Senses

The Peripheral Nervous System: Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood and Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid-Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine System

The Reproductive System

Filters

_ motor neurons innervate skeletal muscle to produce the main contraction whereas ___ motor neurons innervate muscle spindles to maintain their length.