Question 1

Which of these statements applies to the length-tension relationship

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 to develop 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 to develop 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 2

The shorter a muscle fibre is before the onset of a contraction, the greater the force that can be developed upon the subsequent contraction because the thin filaments are already partially slid inward.

Accepted Answer

A) True 
 B)False

Question 3

The three types of muscle tissue are ____________________, ____________________, and ____________________.

Accepted Answer

cardiac; s

Question 4

Which of these factors is NOT a determinant of whole muscle tension

Accepted Answer

A) the number of muscle fibres contracting 
B) the tension produced by each contracting fibre 
C) the extent of motor unit recruitment 
D) the proportion of each motor unit contracting at any given time 
A) the number of muscle fibres contracting 
B) the tension produced by each contracting fibre 
C) the extent of motor unit recruitment 
D) the proportion of each motor unit contracting at any given time

Question 5

Which of these factors is characteristic of cardiac muscle tissue

Accepted Answer

A) well-developed sarcoplasmic reticulum 
B) fast myosin ATPase activity 
C) neurogenically initiated contraction 
D) presence of gap junctions 
A) well-developed sarcoplasmic reticulum 
B) fast myosin ATPase activity 
C) neurogenically initiated contraction 
D) presence of gap junctions

Question 6

If a muscle cell is excited, ____________________ is released from the sarcoplasmic reticulum.

Accepted Answer

The answer of If a muscle cell is excited, ____________________...

Question 7

Which of these statements applies when trying to pick up a book

Accepted Answer

A) Muscle tension must be less than load. 
B) The muscle must lengthen during contraction. 
C) Muscle tension remains constant as the muscle changes length. 
D) Muscle length remains constant as the muscle tension changes. 
A) Muscle tension must be less than load. 
B) The muscle must lengthen during contraction. 
C) Muscle tension remains constant as the muscle changes length. 
D) Muscle length remains constant as the muscle tension changes.

Question 8

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.)
-can exist over a variety of lengths with little change in tension

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 9

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.)
-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 10

____________________ and ____________________ are referred to as contractile proteins, whereas ____________________ and ____________________ are referred to as regulatory proteins.

Accepted Answer

Myosin; actin; tropomyosin; tr

Question 11

According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere.

Accepted Answer

A) True 
 B)False

Question 12

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

Accepted Answer

The answer of The immediate source for supplying additional ATP...

Question 13

The heart initiates its own action potentials without any external influence.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following areas is the origin of a muscle

Accepted Answer

A) the main, thick part of the structure 
B) the middle, thin part of the structure 
C) the movable end of attachment 
D) the stationary end of attachment 
A) the main, thick part of the structure 
B) the middle, thin part of the structure 
C) the movable end of attachment 
D) the stationary end of attachment

Question 15

Which of these structures does NOT directly influence motor neurons

Accepted Answer

A) primary motor cortex 
B) cerebellum 
C) brain stem 
D) afferent neurons (through intervening interneurons) 
A) primary motor cortex 
B) cerebellum 
C) brain stem 
D) afferent neurons (through intervening interneurons)

Question 16

Which of these statements applies multiunit smooth muscle

Accepted Answer

A) It is chemically activated. 
B) It is under the control of the autonomic nervous system. 
C) It is found in the walls of the digestive system. 
D) It is the most dominant component of smooth muscle. 
A) It is chemically activated. 
B) It is under the control of the autonomic nervous system. 
C) It is found in the walls of the digestive system. 
D) It is the most dominant component of smooth muscle.

Question 17

The gradation of whole-muscle tension depends on the number of ____________________ that contract.

Accepted Answer

muscle fib

Question 18

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.)
-behave(s) 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 19

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

Accepted Answer

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

Question 20

What is the term for the region between two Z lines

Accepted Answer

A) muscle fibre 
B) myofibril 
C) myofilament 
D) sarcomere 
A) muscle fibre 
B) myofibril 
C) myofilament 
D) sarcomere

Which of these statements applies to the length-tension relationship

The shorter a muscle fibre is before the onset of a contraction, the greater the force that can be developed upon the subsequent contraction because the thin filaments are already partially slid inward.

The three types of muscle tissue are , , and .

Which of these factors is NOT a determinant of whole muscle tension

Which of these factors is characteristic of cardiac muscle tissue

If a muscle cell is excited, ____________________ is released from the sarcoplasmic reticulum.

Which of these statements applies when trying to pick up a book

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) -can exist over a variety of lengths with little change in tension

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -dark band

and are referred to as contractile proteins, whereas and are referred to as regulatory proteins.

According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere.

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

The heart initiates its own action potentials without any external influence.

Which of the following areas is the origin of a muscle

Which of these structures does NOT directly influence motor neurons

Which of these statements applies multiunit smooth muscle

The gradation of whole-muscle tension depends on the number of ____________________ that contract.

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) -behave(s) as a functional syncytium

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

What is the term for the region between two Z lines

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 applies to the length-tension relationship

The shorter a muscle fibre is before the onset of a contraction, the greater the force that can be developed upon the subsequent contraction because the thin filaments are already partially slid inward.

The three types of muscle tissue are ____________________, ____________________, and ____________________.

Which of these factors is NOT a determinant of whole muscle tension

Which of these factors is characteristic of cardiac muscle tissue

If a muscle cell is excited, ____________________ is released from the sarcoplasmic reticulum.

Which of these statements applies when trying to pick up a book

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) -can exist over a variety of lengths with little change in tension

Match the sarcomere components, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -dark band

____________________ and ____________________ are referred to as contractile proteins, whereas ____________________ and ____________________ are referred to as regulatory proteins.

According to the sliding filament mechanism of muscle contraction, the thick filaments slide in closer together to shorten the sarcomere.

The immediate source for supplying additional ATP at the onset of exercise is ____________________.

The heart initiates its own action potentials without any external influence.

Which of the following areas is the origin of a muscle

Which of these structures does NOT directly influence motor neurons

Which of these statements applies multiunit smooth muscle

The gradation of whole-muscle tension depends on the number of ____________________ that contract.

Match the types of muscles, labelled a. through g., with the properties in question. (Options may be used more than once or not at all.) -behave(s) as a functional syncytium

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

What is the term for the region between two Z lines

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

The three types of muscle tissue are , , and .

and are referred to as contractile proteins, whereas and are referred to as regulatory proteins.