Quiz 12 (Ch 10 and 11)
Authored by Laisha Jimenez
Biology
University
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
An entire skeletal muscle is surrounded by __________.
epimysium
sarcolemma
tendon sheath
perimysium
Answer explanation
Perimysium surrounds bundles of fibers (fasciculi), and endomysium surrounds each fiber. The entire muscle is surrounded by epimysium.
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A motor neuron along with all the muscle fibers it supplies is called a(n) __________.
axon terminal
neuromuscular junction
motor end plate
motor unit
Answer explanation
A motor unit is a nerve-muscle functional unit, with a motor neuron supplying all the muscle fibers within the motor unit.
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
he most common lever systems in the body are those that have the applied force between the fulcrum and the resistance. These are called __________ levers.
first-class
second-class
third-class
fourth-class
Answer explanation
Most skeletal muscles of the body act as third-class lever systems.
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A muscle that assists the muscle primarily responsible for a given action is a(n) __________.
synergist
agonist
originator
antagonist
Answer explanation
Synergists are muscles that help the prime mover by contracting at the same time to add more force or stabilize a part so the movement is more effective.
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A muscle that is inserted on the mandible is probably involved in __________.
blowing
wrinkling the forehead
frowning
chewing
Answer explanation
The muscles of mastication insert on the mandible, causing movement of the jaw during chewing.
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
A muscle whose name ends in the suffix -glossus would be found attached to the __________.
jaw
tongue
lips
chin
Answer explanation
The suffix -glossus means "tongue."
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Damage to which of the following muscles would hinder inspiration?
sacrospinalis
quadratus lumborum
platysma
external intercostals
Answer explanation
The eleven pairs of the external intercostals lie between adjacent ribs on each side to elevate ribs and increase the volume of the thoracic cavity during inspiration.
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