Question 1

In a(n)____________________ contraction,the muscle is prevented from shortening,so tension develops at constant muscle length.

Accepted Answer

​isometric

Question 2

Ca₂+binding to tropomyosin causes myosin to change shape,physically moving it away from its blocking position.​

Accepted Answer

A) True 
 B)False  False

Question 3

How developed is the sarcoplasmic reticulum in cardiac muscle?​

Accepted Answer

A) ​non-existent 
B) poorly developed 
C) moderately developed 
D) well developed 
E) ​heavily developed 
A) ​non-existent 
B) poorly developed 
C) moderately developed 
D) well developed 
E) ​heavily developed C

Question 4

Both the thin and thick filaments change length during muscle fiber shortening.​

Accepted Answer

A) True 
 B)False

Question 5

What are the two major types of spontaneous depolarizations displayed by self-excitable cells?

Accepted Answer

A) ​fast-wave and slow-wave potentials 
B) membrane potentials and slow-wave potentials 
C) pacemaker potentials and slow-wave potentials 
D) smooth potentials and fast-wave potentials 
E) cardiac potentials and fast-wave potentials​ 
A) ​fast-wave and slow-wave potentials 
B) membrane potentials and slow-wave potentials 
C) pacemaker potentials and slow-wave potentials 
D) smooth potentials and fast-wave potentials 
E) cardiac potentials and fast-wave potentials​

Question 6

Figure 8-12
Answer the following questions using the accompanying figure.
  
-Which number in the accompanying figure represents the energized state of the cross-bridge cycle?​

Accepted Answer

A) ​1 
B) 2 
C) 3 
D) 4​ 
E) ​5  
F)7 
A) ​1 
B) 2 
C) 3 
D) 4​ 
E) ​5  
F)7

Question 7

____________________ is a protein complex made of three polypeptide units: one binds to ____________________,one binds to actin,and a third can bind with Ca₂+.

Accepted Answer

Ttroponin;

Question 8

If the muscle fiber is stimulated so rapidly that it does not have a chance to relax at all between stimuli,a smooth,sustained contraction of maximal strength known as ____________________ occurs.

Accepted Answer

The answer of If the muscle fiber is stimulated so...

Question 9

On binding to actin,the myosin head tilts 45 degrees inward.

Accepted Answer

A) True 
 B)False

Question 10

What shape are actin molecules?​

Accepted Answer

A) ​elongated 
B) spherical 
C) bicuspid 
D) rectangular 
E) ​triangular 
A) ​elongated 
B) spherical 
C) bicuspid 
D) rectangular 
E) ​triangular

Question 11

How long does a single action potential in a skeletal muscle fiber last?​

Accepted Answer

A) ​1 to 2 seconds 
B) 0.5 seconds 
C) 5 milliseconds 
D) 1 to 2 milliseconds 
E) ​0.5 milliseconds 
A) ​1 to 2 seconds 
B) 0.5 seconds 
C) 5 milliseconds 
D) 1 to 2 milliseconds 
E) ​0.5 milliseconds

Question 12

Oxidative fibers have high ____________________ content,which is why they are also called ____________________ fibers.

Accepted Answer

The answer of Oxidative fibers have high ____________________ content,which is...

Question 13

What happens when two or more overlapping action potentials are "added" together within a muscle?​

Accepted Answer

A) ​twitch fatigue 
B) twitch summation 
C) contraction addition 
D) contraction paralysis 
E) ​sarcoplasmic reduction 
A) ​twitch fatigue 
B) twitch summation 
C) contraction addition 
D) contraction paralysis 
E) ​sarcoplasmic reduction

Question 14

Loss of descending inhibitory inputs on motor neurons may result in ____.​

Accepted Answer

A) ​spastic paralysis 
B) flaccid paralysis 
C) tetanus 
D) clumsy movement 
E) ​cerebral palsy 
A) ​spastic paralysis 
B) flaccid paralysis 
C) tetanus 
D) clumsy movement 
E) ​cerebral palsy

Question 15

Smooth muscle cells are interconnected by gap junctions found in intercalated discs that join cells together.​

Accepted Answer

A) True 
 B)False

Question 16

For effective control of motor output,what two types of muscle proprioceptors are needed by the CNS?​

Accepted Answer

A) ​muscle spindles and Golgi tendon organs 
B) muscle spindles and stretch receptors 
C) sarcoplasmic reticulum and Golgi tendon organs 
D) sarcomeres and Golgi tendon organs 
E) ​sarcomeres and stretch receptors 
A) ​muscle spindles and Golgi tendon organs 
B) muscle spindles and stretch receptors 
C) sarcoplasmic reticulum and Golgi tendon organs 
D) sarcomeres and Golgi tendon organs 
E) ​sarcomeres and stretch receptors

Question 17

Approximately what percentage of body weight does muscle comprise?​

Accepted Answer

A) ​20% 
B) 35% 
C) 50% 
D) 70% 
E) ​85% 
A) ​20% 
B) 35% 
C) 50% 
D) 70% 
E) ​85%

Question 18

What happens to a muscle during an isometric contraction?

Accepted Answer

A) ​It produces more calcium. 
B) It lengthens. 
C) It shortens. 
D) It is prevented from shortening. 
E) ​Sarcomeres are destroyed. 
A) ​It produces more calcium. 
B) It lengthens. 
C) It shortens. 
D) It is prevented from shortening. 
E) ​Sarcomeres are destroyed.

Question 19

Figure 8-12
Answer the following questions using the accompanying figure.
  
-Which number in the accompanying figure represents the state of rigor complex in the cross-bridge cycle?

Accepted Answer

A) 1​ 
B) 2 
C) 3 
D) 4 
E) ​5  
F)10 
A) 1​ 
B) 2 
C) 3 
D) 4 
E) ​5  
F)10

Question 20

Damage to the cerebellum or basal nuclei results in ____.​

Accepted Answer

A) ​spastic paralysis 
B) flaccid paralysis 
C) tetanus 
D) clumsy movement 
E) ​cerebral palsy 
A) ​spastic paralysis 
B) flaccid paralysis 
C) tetanus 
D) clumsy movement 
E) ​cerebral palsy

In a(n)____________________ contraction,the muscle is prevented from shortening,so tension develops at constant muscle length.

Ca₂+binding to tropomyosin causes myosin to change shape,physically moving it away from its blocking position.

How developed is the sarcoplasmic reticulum in cardiac muscle?

Both the thin and thick filaments change length during muscle fiber shortening.

What are the two major types of spontaneous depolarizations displayed by self-excitable cells?

Figure 8-12 Answer the following questions using the accompanying figure. -Which number in the accompanying figure represents the energized state of the cross-bridge cycle?

is a protein complex made of three polypeptide units: one binds to ,one binds to actin,and a third can bind with Ca₂+.

If the muscle fiber is stimulated so rapidly that it does not have a chance to relax at all between stimuli,a smooth,sustained contraction of maximal strength known as ____________________ occurs.

On binding to actin,the myosin head tilts 45 degrees inward.

What shape are actin molecules?

How long does a single action potential in a skeletal muscle fiber last?

Oxidative fibers have high content,which is why they are also called fibers.

What happens when two or more overlapping action potentials are "added" together within a muscle?

Loss of descending inhibitory inputs on motor neurons may result in ____.

Smooth muscle cells are interconnected by gap junctions found in intercalated discs that join cells together.

For effective control of motor output,what two types of muscle proprioceptors are needed by the CNS?

Approximately what percentage of body weight does muscle comprise?

What happens to a muscle during an isometric contraction?

Figure 8-12 Answer the following questions using the accompanying figure. -Which number in the accompanying figure represents the state of rigor complex in the cross-bridge cycle?

Damage to the cerebellum or basal nuclei results in ____.

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 - Special Senses

The Peripheral Nervous System - Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology - the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive Systembrad

Filters

Exam 8: Muscle Physiology

In a(n)____________________ contraction,the muscle is prevented from shortening,so tension develops at constant muscle length.

Ca₂+binding to tropomyosin causes myosin to change shape,physically moving it away from its blocking position.​

How developed is the sarcoplasmic reticulum in cardiac muscle?​

Both the thin and thick filaments change length during muscle fiber shortening.​

What are the two major types of spontaneous depolarizations displayed by self-excitable cells?

Figure 8-12 Answer the following questions using the accompanying figure. -Which number in the accompanying figure represents the energized state of the cross-bridge cycle?​

____________________ is a protein complex made of three polypeptide units: one binds to ____________________,one binds to actin,and a third can bind with Ca₂+.

If the muscle fiber is stimulated so rapidly that it does not have a chance to relax at all between stimuli,a smooth,sustained contraction of maximal strength known as ____________________ occurs.

On binding to actin,the myosin head tilts 45 degrees inward.

What shape are actin molecules?​

How long does a single action potential in a skeletal muscle fiber last?​

Oxidative fibers have high ____________________ content,which is why they are also called ____________________ fibers.

What happens when two or more overlapping action potentials are "added" together within a muscle?​

Loss of descending inhibitory inputs on motor neurons may result in ____.​

Smooth muscle cells are interconnected by gap junctions found in intercalated discs that join cells together.​

For effective control of motor output,what two types of muscle proprioceptors are needed by the CNS?​

Approximately what percentage of body weight does muscle comprise?​

What happens to a muscle during an isometric contraction?

Figure 8-12 Answer the following questions using the accompanying figure. -Which number in the accompanying figure represents the state of rigor complex in the cross-bridge cycle?

Damage to the cerebellum or basal nuclei results in ____.​

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 - Special Senses

The Peripheral Nervous System - Efferent Division

Cardiac Physiology

The Blood Vessels and Blood Pressure

The Blood

Body Defenses

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

Principles of Endocrinology - the Central Endocrine Glands

The Peripheral Endocrine Glands

The Reproductive Systembrad

Filters

Ca₂+binding to tropomyosin causes myosin to change shape,physically moving it away from its blocking position.

How developed is the sarcoplasmic reticulum in cardiac muscle?

Both the thin and thick filaments change length during muscle fiber shortening.

Figure 8-12 Answer the following questions using the accompanying figure. -Which number in the accompanying figure represents the energized state of the cross-bridge cycle?

is a protein complex made of three polypeptide units: one binds to ,one binds to actin,and a third can bind with Ca₂+.

What shape are actin molecules?

How long does a single action potential in a skeletal muscle fiber last?

Oxidative fibers have high content,which is why they are also called fibers.

What happens when two or more overlapping action potentials are "added" together within a muscle?

Loss of descending inhibitory inputs on motor neurons may result in ____.

Smooth muscle cells are interconnected by gap junctions found in intercalated discs that join cells together.

For effective control of motor output,what two types of muscle proprioceptors are needed by the CNS?

Approximately what percentage of body weight does muscle comprise?

Damage to the cerebellum or basal nuclei results in ____.