Question 1

Joints serve as fulcrums for muscle action.

Accepted Answer

A) True 
 B)False

Question 2

Tropomyosin covers the cross-bridge binding sites on the thick filaments when a sarcomere is not contracting.

Accepted Answer

A) True 
 B)False

Question 3

Muscles developing tension while lengthening,are performing on what type of contractions?

Accepted Answer

A)  concentric 
B)  eccentric 
C)  isometric 
D)  fatiguing 
A)  concentric 
B)  eccentric 
C)  isometric 
D)  fatiguing

Question 4

Which statement concerning the characteristics of different types of muscle fibres is INCORRECT?

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 5

Which statement is correct for Gap junctions?

Accepted Answer

A)  They allow action potentials to spread from cell to cell through these points of electric contact. 
B)  They are the junctions between the muscle fibres within a motor unit. 
C)  They are found only in smooth muscle. 
D)  They are the junctions between the autonomic nervous system and smooth muscle cells. 
A)  They allow action potentials to spread from cell to cell through these points of electric contact. 
B)  They are the junctions between the muscle fibres within a motor unit. 
C)  They are found only in smooth muscle. 
D)  They are the junctions between the autonomic nervous system and smooth muscle cells.

Question 6

Which statement concerning the length-tension relationship is INCORRECT?

Accepted Answer

A)  It refers to the relationship between the length of the muscle before the onset of contraction and the tetanic tension that each contracting fibre can subsequently develop at that length. 
B)  It is based on the amount of overlap of thick and thin filaments. 
C)  It allows no tension development if the whole muscle is stretched to 30 percent longer than its optimal length. 
D)  Within the body, it is limited to a functional range because of limitations on muscle length imposed by attachment to the skeleton. 
A)  It refers to the relationship between the length of the muscle before the onset of contraction and the tetanic tension that each contracting fibre can subsequently develop at that length. 
B)  It is based on the amount of overlap of thick and thin filaments. 
C)  It allows no tension development if the whole muscle is stretched to 30 percent longer than its optimal length. 
D)  Within the body, it is limited to a functional range because of limitations on muscle length imposed by attachment to the skeleton.

Question 7

Which of these muscle types is striated and contains gap junctions?

Accepted Answer

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

Question 8

How does an action potential rapidly spread 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 9

The sarcoplasmic reticulum stores which substance when a muscle is relaxed and releases it for binding to which substance during contraction?

Accepted Answer

A)  It stores calcium for binding to troponin. 
B)  It stores calcium when binding to tropomyosin 
C)  It stores sodium when binding to tropomyosin 
D)  It stores potassium when binding to tropomyosin 
A)  It stores calcium for binding to troponin. 
B)  It stores calcium when binding to tropomyosin 
C)  It stores sodium when binding to tropomyosin 
D)  It stores potassium when binding to tropomyosin

Question 10

Which statement concerning the T tubules is correct?

Accepted Answer

A)  They store Ca2+. 
B)  They provide a means of rapidly transmitting the action potential from the surface into the central portions of the muscle fibre. 
C)  They store ATP. 
D)  They run longitudinally between the myofibrils. 
A)  They store Ca2+. 
B)  They provide a means of rapidly transmitting the action potential from the surface into the central portions of the muscle fibre. 
C)  They store ATP. 
D)  They run longitudinally between the myofibrils.

Question 11

Which statement concerning smooth muscle is INCORRECT?

Accepted Answer

A)  Smooth muscle can develop less tension per unit of cross-sectional area compared to skeletal muscle. 
B)  Smooth muscle can maintain tension with comparatively less ATP consumption than skeletal muscle. 
C)  Smooth muscle lacks troponin and tropomyosin. 
D)  The range of lengths over which smooth muscle is able to develop near maximal tension is much greater than for skeletal muscle. 
A)  Smooth muscle can develop less tension per unit of cross-sectional area compared to skeletal muscle. 
B)  Smooth muscle can maintain tension with comparatively less ATP consumption than skeletal muscle. 
C)  Smooth muscle lacks troponin and tropomyosin. 
D)  The range of lengths over which smooth muscle is able to develop near maximal tension is much greater than for skeletal muscle.

Question 12

Which statement concerning cardiac muscle is INCORRECT?

Accepted Answer

A)  It contains gap junctions. 
B)  It is found only in the heart. 
C)  It is self-excitable. 
D)  It lacks tropomyosin. 
A)  It contains gap junctions. 
B)  It is found only in the heart. 
C)  It is self-excitable. 
D)  It lacks tropomyosin.

Question 13

What 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 is no longer available. 
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 is no longer available.

Question 14

During contraction,asynchronous cycling of crossbridges _______________

Accepted Answer

A)  prevents tetany 
B)  prevents thick filaments from slipping backwards 
C)  prevents thin filaments from slipping backwards 
D)  utilizes less ATP 
A)  prevents tetany 
B)  prevents thick filaments from slipping backwards 
C)  prevents thin filaments from slipping backwards 
D)  utilizes less ATP

Question 15

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all).
-has myosin ATPase activity

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 16

A skeletal muscle undergoes hypertrophy mainly by producing many more muscle fibres.

Accepted Answer

A) True 
 B)False

Question 17

The T tubule ranges transversely to the surface of the muscle cell membrane.

Accepted Answer

A) True 
 B)False

Question 18

The immediate source of additional ATP in muscle fibres is ____________________.

Accepted Answer

The answer of The immediate source of additional ATP in...

Question 19

Indicate which characteristic applies to which type of muscle by using the answer code (options may be used more than once or not at all).
-used to accomplish movement

Accepted Answer

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

Question 20

Single-unit smooth muscle has no innervation.

Accepted Answer

A) True 
 B)False

Joints serve as fulcrums for muscle action.

Tropomyosin covers the cross-bridge binding sites on the thick filaments when a sarcomere is not contracting.

Muscles developing tension while lengthening,are performing on what type of contractions?

Which statement concerning the characteristics of different types of muscle fibres is INCORRECT?

Which statement is correct for Gap junctions?

Which statement concerning the length-tension relationship is INCORRECT?

Which of these muscle types is striated and contains gap junctions?

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

The sarcoplasmic reticulum stores which substance when a muscle is relaxed and releases it for binding to which substance during contraction?

Which statement concerning the T tubules is correct?

Which statement concerning smooth muscle is INCORRECT?

Which statement concerning cardiac muscle is INCORRECT?

What is involved in the process of muscle relaxation?

During contraction,asynchronous cycling of crossbridges _______________

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all). -has myosin ATPase activity

A skeletal muscle undergoes hypertrophy mainly by producing many more muscle fibres.

The T tubule ranges transversely to the surface of the muscle cell membrane.

The immediate source of additional ATP in muscle fibres is ____________________.

Indicate which characteristic applies to which type of muscle by using the answer code (options may be used more than once or not at all). -used to accomplish movement

Single-unit smooth muscle has no innervation.

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

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Exam 6: Muscle Physiology

Joints serve as fulcrums for muscle action.

Tropomyosin covers the cross-bridge binding sites on the thick filaments when a sarcomere is not contracting.

Muscles developing tension while lengthening,are performing on what type of contractions?

Which statement concerning the characteristics of different types of muscle fibres is INCORRECT?

Which statement is correct for Gap junctions?

Which statement concerning the length-tension relationship is INCORRECT?

Which of these muscle types is striated and contains gap junctions?

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

The sarcoplasmic reticulum stores which substance when a muscle is relaxed and releases it for binding to which substance during contraction?

Which statement concerning the T tubules is correct?

Which statement concerning smooth muscle is INCORRECT?

Which statement concerning cardiac muscle is INCORRECT?

What is involved in the process of muscle relaxation?

During contraction,asynchronous cycling of crossbridges _______________

Indicate which of the characteristics in question applies to each of the muscle fibre types by using the answer code (options may be used more than once or not at all). -has myosin ATPase activity

A skeletal muscle undergoes hypertrophy mainly by producing many more muscle fibres.

The T tubule ranges transversely to the surface of the muscle cell membrane.

The immediate source of additional ATP in muscle fibres is ____________________.

Indicate which characteristic applies to which type of muscle by using the answer code (options may be used more than once or not at all). -used to accomplish movement

Single-unit smooth muscle has no innervation.

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Cardiac Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine Glands

The Reproductive System

Filters