Question 1

Which type of muscle fiber has no myofibrils?

Accepted Answer

A)  skeletal 
B)  smooth 
C)  cardiac 
D)  red 
A)  skeletal 
B)  smooth 
C)  cardiac 
D)  red

Question 2

Describe the differences in the mixture of fiber types that are present in the calf muscles of a sprinter compared to those of a long-distance runner. Explain the anatomical basis for the differences between these fiber types.

Accepted Answer

A sprinter might have a higher proportio

Question 3

Eccentric contraction

Accepted Answer

A)  generates force as the muscle lengthens. 
B)  generates force without changing the length of the muscle. 
C)  pulls the insertion toward the origin. 
D)  shortens the muscle. 
A)  generates force as the muscle lengthens. 
B)  generates force without changing the length of the muscle. 
C)  pulls the insertion toward the origin. 
D)  shortens the muscle.

Question 4

Terminal boutons

Accepted Answer

A)  are the small areas at the end of motor dendrite processes. 
B)  store hormones that influence muscular contraction. 
C)  make a direct connection with the muscle fiber, with no space in between. 
D)  sit within depressions in the sarcolemma. 
A)  are the small areas at the end of motor dendrite processes. 
B)  store hormones that influence muscular contraction. 
C)  make a direct connection with the muscle fiber, with no space in between. 
D)  sit within depressions in the sarcolemma.

Question 5

Without the strengthening protein dystrophin, which is missing from diseased fibers in muscular dystrophy, extracellular calcium ions leak through the torn wall of the fiber and compromise the muscle fiber's function.

Accepted Answer

A) True 
 B)False

Question 6

Muscle tissue can be characterized as being excitable and elastic, but not extensible.

Accepted Answer

A) True 
 B)False

Question 7

A common characteristic of the three types of muscle tissue is that

Accepted Answer

A)  they all have striations. 
B)  contraction is triggered by the release of calcium. 
C)  they all contain sarcomeres. 
D)  they can all use aerobic and anaerobic methods to utilize energy. 
A)  they all have striations. 
B)  contraction is triggered by the release of calcium. 
C)  they all contain sarcomeres. 
D)  they can all use aerobic and anaerobic methods to utilize energy.

Question 8

Muscle tissue is endowed with all of the following properties except

Accepted Answer

A)  excitability. 
B)  contractibility. 
C)  extensibility. 
D)  transmissibility. 
A)  excitability. 
B)  contractibility. 
C)  extensibility. 
D)  transmissibility.

Question 9

________ is a specialized smooth endoplasmic reticulum found in muscle fibers.

Accepted Answer

Sarcoplasm

Question 10

A motor unit includes

Accepted Answer

A)  a motor neuron and all of the muscle fibers it innervates. 
B)  a muscle fiber and the single neuron that innervates it. 
C)  all of the motor neurons and fibers within a single fascicle. 
D)  all of the muscle fibers within a single muscle. 
A)  a motor neuron and all of the muscle fibers it innervates. 
B)  a muscle fiber and the single neuron that innervates it. 
C)  all of the motor neurons and fibers within a single fascicle. 
D)  all of the muscle fibers within a single muscle.

Question 11

Both cardiac muscle and this type of muscle are called involuntary.

Accepted Answer

A)  skeletal muscle 
B)  smooth muscle 
C)  cardiac muscle 
A)  skeletal muscle 
B)  smooth muscle 
C)  cardiac muscle

Question 12

Fusion of embryonic ________ cells from the mesoderm creates multinucleated skeletal muscle fibers.

Accepted Answer

The answer of Fusion of embryonic ________ cells from the...

Question 13

Use the diagram above to answer the following questions.
-Identify the letter that indicates the titin filament.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 14

Describe the relationship between the connective tissue coverings over muscles and the way in which muscles attach to bones.

Accepted Answer

The three connective tissue layers withi

Question 15

Of the various types of skeletal muscle fibers, the ones supplied by the most capillaries are

Accepted Answer

A)  slow oxidative fibers. 
B)  fast glycolytic fibers. 
C)  fast oxidative fibers. 
D)  slow glycolytic fibers. 
A)  slow oxidative fibers. 
B)  fast glycolytic fibers. 
C)  fast oxidative fibers. 
D)  slow glycolytic fibers.

Question 16

In limbs, the insertions of muscles almost always lie ________ to their origins.

Accepted Answer

A)  proximal 
B)  distal 
C)  lateral 
D)  posterior 
A)  proximal 
B)  distal 
C)  lateral 
D)  posterior

Question 17

How do muscles enlarge when undergoing athletic training?

Accepted Answer

by increasing the nu

Question 18

A cell of this type of muscle is striated and can be uninucleated or binucleated.

Accepted Answer

A)  skeletal muscle 
B)  smooth muscle 
C)  cardiac muscle 
A)  skeletal muscle 
B)  smooth muscle 
C)  cardiac muscle

Question 19

Skeletal muscle fibers are multinucleate, because they arose from a number of embryonic cells.

Accepted Answer

A) True 
 B)False

Question 20

Use the diagram above to answer the following questions.
-This structure is composed entirely of dense regular connective tissue and connects bone to muscle.

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Exam 10: Skeletal Muscle Tissue

Which type of muscle fiber has no myofibrils?

Describe the differences in the mixture of fiber types that are present in the calf muscles of a sprinter compared to those of a long-distance runner. Explain the anatomical basis for the differences between these fiber types.

Eccentric contraction

Terminal boutons

Without the strengthening protein dystrophin, which is missing from diseased fibers in muscular dystrophy, extracellular calcium ions leak through the torn wall of the fiber and compromise the muscle fiber's function.

Muscle tissue can be characterized as being excitable and elastic, but not extensible.

A common characteristic of the three types of muscle tissue is that

Muscle tissue is endowed with all of the following properties except

________ is a specialized smooth endoplasmic reticulum found in muscle fibers.

A motor unit includes

Both cardiac muscle and this type of muscle are called involuntary.

Fusion of embryonic ________ cells from the mesoderm creates multinucleated skeletal muscle fibers.

Use the diagram above to answer the following questions. -Identify the letter that indicates the titin filament.

Describe the relationship between the connective tissue coverings over muscles and the way in which muscles attach to bones.

Of the various types of skeletal muscle fibers, the ones supplied by the most capillaries are

In limbs, the insertions of muscles almost always lie ________ to their origins.

How do muscles enlarge when undergoing athletic training?

A cell of this type of muscle is striated and can be uninucleated or binucleated.

Skeletal muscle fibers are multinucleate, because they arose from a number of embryonic cells.

Use the diagram above to answer the following questions. -This structure is composed entirely of dense regular connective tissue and connects bone to muscle.

The Human Body: an Orientation

Cells: the Living Units

Basic Embryology

Tissues

The Integumentary System

Bones and Skeletal Tissues

Bones, Part 1: the Axial Skeleton

Bones, Part 2: the Appendicular Skeleton

Joints

Muscles of the Body

Fundamentals of the Nervous System and Nervous Tissue

The Central Nervous System

The Peripheral Nervous System

The Autonomic Nervous System and Visceral Sensory Neurons

The Special Senses

The Endocrine System

Blood

The Heart

Blood Vessels

The Lymphatic and Immune Systems

The Respiratory System

The Digestive System

The Urinary System

The Reproductive System

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