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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


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.


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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

/ 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 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 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

/ 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

/ 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

/ 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

/ 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 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

/ 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?






Question 10

/ 2 pts
A convex lens will cause the light rays to ____________.

be reflective


change colors

converge at a focal point

change intensity

Question 11

/ 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

/ 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

/ 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

/ 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 _________.


first decreases, then increases quickly


stays the same


Question 15

/ 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

/ 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 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

/ 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 pts
Which of the following is a bony labyrinth?

semicircular duct




scala media

IncorrectQuestion 20

/ 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 pts
When the blood leaves the lungs, it enters the ________ next.

left atrium

right ventricle

right atrium

left ventricle


IncorrectQuestion 22

/ 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 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

/ 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 pts
Which of the following represents atrial depolarization (contraction)?

Q wave

R wave

S wave

P wave

T wave

IncorrectQuestion 26

/ 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

/ 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 pts
Which of the following is part of the external ear?






Question 29

/ 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 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






IncorrectQuestion 31

/ 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

/ 2 pts

terminal ganglion

gray ramus

collateral (prevertebral) ganglion

cranial nerve VII, Facial

cranial nerve III, Oculomotor

IncorrectQuestion 33

/ 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

/ 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

/ 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

/ 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

/ 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

/ 2 pts
All the following are parts of or are contained within the vascular layer of the eye EXCEPT:



ciliary body


ciliary muscle

Question 39

/ 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 pts
Aqueous humor is generated by which of the following?

ciliary body





IncorrectQuestion 41

/ 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

/ 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 pts
All the following are part of the middle ear EXCEPT:

tympanic membrane

pharyngotympanic (Eustachian) tube




IncorrectQuestion 44

/ 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 pts
Which of the following is caused by an irregularly-shaped lens or cornea causing erratic refraction?






Question 46

/ 2 pts
The saccule is in the __________.

cochlear duct



semicircular duct


IncorrectQuestion 47

/ 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

/ 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

/ 2 pts
Which of the following contains the greatest amount of rhodopsin?


bipolar cells


ganglion cells


Question 50

/ 2 pts
All the following are true of a photoreceptor in the light phase EXCEPT:

the bleached opsin activates transducin

cGMP is low

the photoreceptor is depolarized

sodium channels are closed

the amount of neurotransmitter released is decreased