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Course MSCI 522_Fall 21 - Principles of Physiology II
Lesson Skeletal Muscle Structure and Function
Student email
Skeletal muscle organization
Which of the following terms is the exception?
Muscle cell
Muscle ber
Myocyte
Myo bril
Which of the following are functions of skeletal muscle and which are not?
Function
Locomotion Maintenance of posture M
Maintenance of posture Locomotion
Movement of substances Support and stabilization of
through the gut joints
Production of heat to maintain Production of heat to maintain
internal body temperature internal body temperature
Support and stabilization of
joints
, Which statements regarding motor units are true, and which are false?
True
A motor unit consists of a motor A motor unit consists of a motor As
neuron and all the muscle bers neuron and all the muscle bers in
it innervates. it innervates.
A single muscle ber may be Many muscles contain motor
innervated by two or more units of di erent sizes.
motor neurons.
Many muscles contain motor
units of di erent sizes.
What size are the motor units that control Steve's postural muscles as he sits at the piano?
Large
Small
Consider the muscles that control the movement of Steve's ngers as he plays piano. Whic
motor units that innervate these muscles are true, and which are false?
True
These motor units allow for ne Thes
These motor neurons innervate a
control of muscle movement.
relatively small number of
muscle bers. These muscles are innervated by The
These motor units allow for ne small motor units.
control of muscle movement. These motor neurons innervate a
These motor units can produce relatively small number of
plenty of force. muscle bers.
These muscles are innervated by
large motor units.
Course MSCI 522_Fall 21 - Principles of Physiology II
Lesson Skeletal Muscle Structure and Function
Student email
Skeletal muscle organization
Which of the following terms is the exception?
Muscle cell
Muscle ber
Myocyte
Myo bril
Which of the following are functions of skeletal muscle and which are not?
Function
Locomotion Maintenance of posture M
Maintenance of posture Locomotion
Movement of substances Support and stabilization of
through the gut joints
Production of heat to maintain Production of heat to maintain
internal body temperature internal body temperature
Support and stabilization of
joints
, Which statements regarding motor units are true, and which are false?
True
A motor unit consists of a motor A motor unit consists of a motor As
neuron and all the muscle bers neuron and all the muscle bers in
it innervates. it innervates.
A single muscle ber may be Many muscles contain motor
innervated by two or more units of di erent sizes.
motor neurons.
Many muscles contain motor
units of di erent sizes.
What size are the motor units that control Steve's postural muscles as he sits at the piano?
Large
Small
Consider the muscles that control the movement of Steve's ngers as he plays piano. Whic
motor units that innervate these muscles are true, and which are false?
True
These motor units allow for ne Thes
These motor neurons innervate a
control of muscle movement.
relatively small number of
muscle bers. These muscles are innervated by The
These motor units allow for ne small motor units.
control of muscle movement. These motor neurons innervate a
These motor units can produce relatively small number of
plenty of force. muscle bers.
These muscles are innervated by
large motor units.
