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Question 1 of 32
3.0/ 3.0 Points
The humerus fits into what at the shoulder?

A.acetabulum
B.clavicle
C.acromion process
D.glenoid cavity
E.olecranon process

Question 2 of 32
3.0/ 3.0 Points
What two hormones are involved in regulating the blood
calcium level?

A.calcitonin and
renin
B.renin and
aldosterone
C.renin and PTH
D.aldosterone and PTH
E.PTH and calcitonin

Question 3 of 32
3.0/ 3.0 Points
How many vertebrae are there?

A.5
B.10
C.18
D.24
E.33

Question 4 of 32
3.0/ 3.0 Points
Which function of the skeletal system requires the leg bones
to be extremely strong?

A.They support the
entire body.
B.They protect soft
body parts.
C.They produce blood
cells.
D.They store minerals
and fat.
E.They permit
flexible body movement.

Question 5 of 32
3.0/ 3.0 Points
Which bone is part of the pectoral girdle?

A.clavicle
B.radius
C.ulna
D.carpals
E.manubrium

Question 6 of 32
3.0/ 3.0 Points
What is the name of the small gap that separates the axon
terminal of a nerve from the sarcolemma?

A.T tubule
B.sliding filament
C.synaptic cleft
D.synaptic vesicle
E.sarcoplasmic
reticulum

Question 7 of 32
3.0/ 3.0 Points
What ion is responsible for initiating muscle contraction?

A.Mg2+
B.Ca2+
C.H+
D.Cl-
E.Na+

Question 8 of 32
3.0/ 3.0 Points
One sarcomere

A.extends from Z line
to Z line.
B.is composed of many
myofibrils.
C.contains only actin
fibers.
D.is composed of many
muscle fibers.
E.surrounds each
muscle in the body.

Question 9 of 32
3.0/ 3.0 Points
What is found within the intercalated disks of cardiac
muscle?

A.sarcoplasmic
reticulum
B.gap junctions
C.dense connective
tissue
D.bone
E.myoglobin

Question 10 of 32
3.0/ 3.0 Points
What is the name of a sudden and involuntary muscular
contraction, often accompanied by pain?

A.bursitis
B.sprain
C.strain
D.tic
E.spasm

Question 11 of 32
3.0/ 3.0 Points
Of the three types of muscle tissue, which is not striated?

A.smooth muscle
B.cardiac muscle
C.skeletal muscle
D.skeletal and smooth
lack striations
E.cardiac and smooth
lack striations

Question 12 of 32
3.0/ 3.0 Points
The cerebrum is associated with the

A.two lateral
ventricles.
B.third ventricle.
C.fourth ventricle.
D.posterior
ventricle.
E.anterior ventricle.

Question 13 of 32
3.0/ 3.0 Points
What type of memory does language depend upon?

A.short-term
B.semantic
C.episodic
D.skill
E.long term

Question 14 of 32
3.0/ 3.0 Points
Which of the following is not a function of the nervous
system?

A.receive sensory
input
B.cushion and protect
soft tissue
C.perform information
processing
D.perform integration
E.generate motor
output

Question 15 of 32
3.0/ 3.0 Points
The spinal cord belongs to the

A.peripheral nervous
system.
B.central nervous
system.
C.axial nervous
system.
D.appendicular
nervous system.
E.none of these.

Question 16 of 32
3.0/ 3.0 Points
Long term use of heroin results in which set of symptoms?

A.weight gain, poor
cognitive performance, irritability
B.cardiac and/or
respiratory arrest, sudden death
C.apathy, euphoria,
hallucinations
D.addiction,
hepatitis, HIV/AIDS, various bacterial infections
E.anxiety, jitters,
insomnia, headaches

Question 17 of 32
3.0/ 3.0 Points
Which of the following is part of the limbic system?

A.spinal cord
B.primary
somatosensory area
C.amygdala
D.reticular formation
E.cerebellum

Question 18 of 32
3.0/ 3.0 Points
Which disorder of the eye is due to the cornea or lens being
uneven resulting in a fuzzy image?

A.astigmatism
B.glaucoma
C.color blindness
D.nearsightedness
E.farsightedness

Question 19 of 32
3.0/ 3.0 Points
The utricle is especially sensitive to what type of
movements?

A.back and forth
B.up and down
C.standing upside
D.spinning around
E.bending over

Question 20 of 32
3.0/ 3.0 Points
Which structure in the eye refracts and focuses light rays?

A.lens
B.humors
C.cone cells
D.retina
E.pupil

Question 21 of 32
3.0/ 3.0 Points
The summing up of nerve signals by _____________________ is
called __________________.

A.the reticular
activating system, perception
B.the cerebral
cortex, sensation
C.sensory receptors,
sensation
D.the cerebral
cortex, perception
E.sensory receptors,
integration

Question 22 of 32
3.0/ 3.0 Points
What type of exteroceptors are located in the ear?

A.mechanoreceptors
B.chemoreceptors
C.photoreceptors
D.thermoreceptors
E.none of these

Question 23 of 32
3.0/ 3.0 Points
Why does wave summation occur?
A.Muscle fibers have
been allowed to fully relax.
B.A large amount of
time elapses between stimulations.
C.Muscle fibers are
partially contracted when the next stimulus arrives.
D.Muscle twitches are
not yet overlapping.

Question 24 of 32
3.0/ 3.0 Points
In the lab, a researcher finds that the threshold stimulus
to induce an action potential in a muscle
fiber’s sarcolemma was 3.0 volts. Which of the following
would result in muscle tension?
A.1.0 volt
B.2.0 volts
C.3.0 volts
D.4.0 volts
E.3.0 volts and 4.0
volts

Question 25 of 32
3.0/ 3.0 Points
A motor unit is defined as _______.
A.a single neuron and
a single muscle fiber
B.a nerve and a
muscle
C.the axon terminals
of a single motor neuron and all of the muscle fibers that it stimulates
D.a single muscle
fiber and all its axon terminals

Question 26 of 32
3.0/ 3.0 Points
When wave summation occurs, _______.
A.individual muscle
twitches are separated
B.the muscle force
generated decreases
C.the muscle fiber
has received a single stimulus event
D.the muscle force
generated increases

Question 27 of 32
3.0/ 3.0 Points
Which of the following is NOT a phase of a muscle twitch?
A.contraction phase
B.shortening phase
C.relaxation phase
D.latent period
Question 28 of 32
3.0/ 3.0 Points
Contraction of a skeletal muscle that results from a single
stimulus is called a ________.
A.contraction phase
B.twitch
C.motor unit
D.tetanus

Question 29 of 32
3.0/ 3.0 Points
Which of the following describes the relaxation phase?
A.The sarcomeres are
increasing in length, and the force generated increases.
B.The sarcomeres are
increasing in length, and the force generated decreases.
C.The sarcomeres are
decreasing in length, and the force generated increases.
D.The sarcomeres are
decreasing in length, and the force generated decreases.

Part 6 of 7 – 0.0/
8.0 Points Answer the following question in your own words without using any
resources. Your answer should be written in complete sentences using correct grammar,
spelling, and terminology.

Question 30 of 32
0.0/ 4.0 Points
Briefly describe “wave summation.”

Question 31 of 32
0.0/ 4.0 Points
Briefly describe “treppe.”

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