Lecture Exam 2
- Due Jun 3 at 11:59pm
- Points 100
- Questions 50
- Available Jun 3 at 12am – Jun 3 at 11:59pm about 24 hours
- Time Limit 60 Minutes
Instructions
The lecture exam has 50 multiple-choice questions. You will have 60 minutes to complete it. The exam is worth 100 points. When the time expires, it will automatically shut off and your exam will be submitted immediately.
Please note: the exam will open at 12:00 a.m. (ET) on the date of the exam and it will remain accessible until 11:59 p.m. (ET). If you start the exam with less than 60 minutes before the 11:59 p.m. (ET) cutoff, the exam will stop at 11:59 p.m. (ET) regardless of where you’re at or how much time you think you have left. Thus, make sure you allot yourself enough time to complete the exam, because any questions left unanswered when the time expires will be counted wrong.
Academic Integrity
- By clicking the link to access this exam, you agree to Marian University’s Code Student Rights and Responsibilities (Links to an external site.). Under Article V Section A. Academic Integrity, cheating is expressly prohibited and includes the use of any other materials during your exam.
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- All members of the Marian University community are expected to maintain the highest level of honesty in every phase of their academic lives and to help create and promote an ethical atmosphere in which the goals of the university can be fully realized.
Attempt History
| Attempt | Time | Score | |
|---|---|---|---|
| LATEST | Attempt 1 | 53 minutes | 40 out of 100 |
Correct answers will be available Jun 5 at 12am – Jun 6 at 12am.
Score for this quiz: 40 out of 100
Submitted Jun 3 at 2:42pm
This attempt took 53 minutes.
IncorrectQuestion 1
0 / 2 pts
For a hair cell of the organ of Corti to depolarize, which of the following must open?
sodium ligand-gated channel
potassium ligand-gated channel
potassium mechanically-gated channel
sodium voltage-gated channel
potassium voltage-gated channel
Question 2
2 / 2 pts
Cardiac output is the ___________.
amount of blood pumped out of the atria during atrial contraction
amount of blood pumped out of a ventricle per beat
amount of blood pumped out of the heart in one minute
amount of blood flowing into the right atrium
difference between the heart rate and the stroke volume
Question 3
2 / 2 pts
All the following are true regarding the interaction of the sympathetic nervous system with the heart EXCEPT:
norepinephrine is released
funny channels close
epinephrine is released
calcium channels open
action potentials increase
IncorrectQuestion 4
0 / 2 pts
All the following are components of the parasympathetic nervous system EXCEPT:
lateral gray matter in the sacral cord
cranial nerve III, oculomotor
terminal ganglia
collateral (prevertebral) ganglia
cranial nerve VII, facial
IncorrectQuestion 5
0 / 2 pts
The first heart sound is heard during which phase?
phase 1
phase 2
phase 3
phase 4
none of the above, there is only one heart sound
IncorrectQuestion 6
0 / 2 pts
During which phase does the aortic pressure reach its maximum level?
phase 1
phase 2
phase 3
phase 4
none of the above, its maximum is never achieved
IncorrectQuestion 7
0 / 2 pts
Which of the following is NOT true concerning the ANS (autonomic nervous system)?
the sympathetic division originates from the brainstem
it utilizes ganglia
parasympathetic axons are found in cranial nerve X (vagus)
it always involves preganglionic and postganglionic neurons
it is an involuntary motor system
Question 8
2 / 2 pts
The cell bodies of postganglionic sympathetic neurons contain which of the following receptors?
muscarinic cholinergic receptors
nicotinic cholinergic receptors
alpha adrenergic receptors
beta adrenergic receptors
none of the above is correct
IncorrectQuestion 9
0 / 2 pts
If a patient had an ESV of 60 ml and an EDV of 150 ml, what would be his/her approximate ejection fraction?
50%
40%
90%
60%
70%
Question 10
2 / 2 pts
A convex lens will cause the light rays to ____________.
be reflective
diverge
change colors
converge at a focal point
change intensity
Question 11
2 / 2 pts
All the following cranial nerves carry preganglionic parasympathetic (involuntary) motor neurons EXCEPT:
X Vagus
IX Glossopharyngeal
VII Facial
V Trigeminal
III Oculomotor
IncorrectQuestion 12
0 / 2 pts
Which of the following does NOT release acetylcholine?
preganglionic sympathetic neurons
preganglionic parasympathetic neurons
postganglionic parasympathetic neurons
postganglionic sympathetic neurons to the salivary glands
postganglionic sympathetic neurons
IncorrectQuestion 13
0 / 2 pts
When looking at an EKG strip, which of the following represents atrial relaxation?
P wave
T wave
Q wave
R wave
none of the above
IncorrectQuestion 14
0 / 2 pts
When the stereocilia of the hair cells in the organ of Corti are bent toward the tallest ones, the rate of action potentials _________.
decreases
first decreases, then increases quickly
ceases
stays the same
increases
Question 15
2 / 2 pts
If a P-wave was missing from an EKG tracing, which of the following would be true?
the SA node did not fire
the ventricles did not contract
the atria did not contract
the ventricles did not relax
two of the above are correct
IncorrectQuestion 16
0 / 2 pts
Which of the following delivers electrical impulses directly to the heart muscle cells of the ventricles?
AV node
SA node
bundle branches
Purkinje fibers
atrioventricular bundle (bundle of His)
Question 17
2 / 2 pts
If the heart rate is 90 beats/min and the cardiac output is 5400 ml/min, what is the stroke volume?
2000 ml/beat
5310 ml/beat
486,000 ml/beat
250 ml/beat
60 ml/beat
IncorrectQuestion 18
0 / 2 pts
Which pair of cranial nerves carries parasympathetic preganglionic neurons to the salivary glands?
III Oculomotor; X Vagus
VII Facial; X Vagus
VII Facial; IX Glossopharyngeal
IX Glossopharyngeal; X Vagus
III Oculomotor; VII Facial
Question 19
2 / 2 pts
Which of the following is a bony labyrinth?
semicircular duct
cochlea
utricle
saccule
scala media
IncorrectQuestion 20
0 / 2 pts
The reason that the electrical current flows from one heart muscle cell to the next is because _________.
each cell is stimulated by a neuron
they are heavily myelinated
of the unusual sodium channels
of the oxygenated blood in the left atrium
of the gap junctions
Question 21
2 / 2 pts
When the blood leaves the lungs, it enters the ________ next.
left atrium
right ventricle
right atrium
left ventricle
aorta
IncorrectQuestion 22
0 / 2 pts
When the blood leaves the left ventricle, it passes through the _________ next.
right AV valve
pulmonary semilunar valve
left AV valve
right atrium
aortic semilunar valve
Question 23
2 / 2 pts
When electrical impulses leave the bundle of His, they move next into the ___________ next.
AV node
bundle branches
SA node
Purkinje fibers
none of the above is correct
IncorrectQuestion 24
0 / 2 pts
All the following are true of the pacemaker cells EXCEPT:
the funny channels allow more sodium to enter than potassium to leave
at -60 mv the funny channels open
they are muscle cells with very little contractile ability
at -55 mv the calcium channels close
they have autorhythmicity
Question 25
2 / 2 pts
Which of the following represents atrial depolarization (contraction)?
Q wave
R wave
S wave
P wave
T wave
IncorrectQuestion 26
0 / 2 pts
When a pacemaker cell reaches +30 millivolts, which of the following occur?
sodium ligand-gated channels open
funny channels open
L-type calcium channels close
T-type calcium channels open
potassium voltage-gated channels close
IncorrectQuestion 27
0 / 2 pts
What is the correct order of channel opening for a pacemaker cell to depolarize and then repolarize?
funny channels, voltage-gated potassium channels, T-type calcium channels, L- type calcium channels
L-type calcium channels, funny channels, voltage-gated potassium channels, T- type calcium channels
voltage-gated potassium channels, funny channels, L-type calcium channels, T- type calcium channels
funny channels, T-type calcium channels, L-type calcium channels, voltage- gated potassium channels
funny channels, L-type calcium channels, T-type calcium channels, voltage-gated potassium channels
Question 28
2 / 2 pts
Which of the following is part of the external ear?
vestibule
stapes
cochlea
malleus
pinna
Question 29
2 / 2 pts
If you were told that the end-systolic volume was 65 ml and the end-diastolic volume was 155 ml, what would be the stroke volume?
220 ml
34.5 ml
2.38 ml
90 ml
it can’t be determined from these two values
Question 30
2 / 2 pts
If a patient’s blood pressure is 124/67, what is his/her mean arterial pressure (MAP)?
a. 114 mmHg
b. 26 mmHg
c. 86 mmHg
d. 64 mmHg
e. 79 mmHg
a
b
c
d
e
IncorrectQuestion 31
0 / 2 pts
The ventricular volume first reaches its minimum (that is, the end systolic volume, ESV) at the end of _________.
phase 1
phase 2
phase 3
phase 4
none of the above, there isn’t a minimum ESV
IncorrectQuestion 32
0 / 2 pts
terminal ganglion
gray ramus
collateral (prevertebral) ganglion
cranial nerve VII, Facial
cranial nerve III, Oculomotor
IncorrectQuestion 33
0 / 2 pts
All the following are true regarding the parasympathetic nervous system’s effect on heart rate EXCEPT:
the neurotransmitter binds to beta 2 adrenergic receptors
the neurotransmitter released is acetylcholine
the neurotransmitter closes T-type calcium channels and opens potassium channels
the pacemaker cells hyperpolarize
the number of action potentials generated by the pacemaker cells decrease
IncorrectQuestion 34
0 / 2 pts
Which of the following is TRUE regarding the fovea centralis?
it is surrounded by aqueous humor
it contains the ciliary muscle
it is made up of two muscles
it is the blind spot (no photoreceptors)
it contains only cones
IncorrectQuestion 35
0 / 2 pts
Which of the following is not found in the retina?
the constrictor pupillae muscle
a layer of ganglion cells
amacrine, horizontal, and bipolar cells (neurons)
an outer layer of rods and cones
a pigmented epithelial layer
IncorrectQuestion 36
0 / 2 pts
Loudness of sound is based on _______________.
how many hair cells are struck by a fluid wave
where the fluid wave strikes the organ of Corti
how far the stereocilia on the hair cells bend
the frequency of the fluid waves
none of the above is correct
IncorrectQuestion 37
0 / 2 pts
The ciliary muscle __________.
changes the shape of the lens
changes the shape of the cornea
decreases the amount of light entering the eye
increases the amount of light entering the eye
can move the fovea centralis
IncorrectQuestion 38
0 / 2 pts
All the following are parts of or are contained within the vascular layer of the eye EXCEPT:
choroid
iris
ciliary body
cornea
ciliary muscle
Question 39
2 / 2 pts
What is the function of the iris?
to reflect light
to regulate the amount of light entering the eye
to refract light so that it strikes the fovea centralis
to change the shape of the lens when looking at close objects
to produce aqueous humor
Question 40
2 / 2 pts
Aqueous humor is generated by which of the following?
ciliary body
cornea
sclera
choroid
iris
IncorrectQuestion 41
0 / 2 pts
The crista ampullaris is in the ___________ and it responds to ___________.
utricle; head tilt
scala media; angular (rotational) acceleration
semicircular duct; linear acceleration
saccule; linear acceleration
semicircular duct; angular (rotational) acceleration
IncorrectQuestion 42
0 / 2 pts
All the following are true about rhodopsin EXCEPT:
it is composed of retinal and opsin
the rhodopsin found in cones will react to dim, non-colored light
if struck by light, the retinal will detach from the opsin (bleached)
there is more rhodopsin in rods than in cones
the bleached opsin will activate transducin
Question 43
2 / 2 pts
All the following are part of the middle ear EXCEPT:
tympanic membrane
pharyngotympanic (Eustachian) tube
incus
stapes
malleus
IncorrectQuestion 44
0 / 2 pts
The pitch of a sound is determined by __________.
how much the stereocilia are bent toward the tallest ones
the tension on the round window
how much the fluid moves in the scala tympani
where the fluid wave strikes the organ of Corti
how much the stereocilia are bent toward the shortest ones
Question 45
2 / 2 pts
Which of the following is caused by an irregularly-shaped lens or cornea causing erratic refraction?
presbyopia
hyperopia
cataract
astigmatism
glaucoma
Question 46
2 / 2 pts
The saccule is in the __________.
cochlear duct
ampulla
vestibule
semicircular duct
macula
IncorrectQuestion 47
0 / 2 pts
All the following are true regarding myopia EXCEPT:
the lens may be too flat (not bulged enough)
your near-sight is not affected
you correct it with a concave lens
the cornea may be too bulged
when viewing a distant object, the light rays are bent too much
IncorrectQuestion 48
0 / 2 pts
Which is FALSE of a photoreceptor in the dark phase?
cGMP is high
neurotransmitter release is increased
the photoreceptor is in a depolarized state
sodium channels are closed
calcium is entering the cell
IncorrectQuestion 49
0 / 2 pts
Which of the following contains the greatest amount of rhodopsin?
cones
bipolar cells
rods
ganglion cells
maculae