- Due May 22 at 11:59pm
- Points 100
- Questions 50
- Available May 22 at 12am – May 22 at 11:59pm 1 day
- 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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This quiz was locked May 22 at 11:59pm.
Attempt History
| Attempt | Time | Score | |
|---|---|---|---|
| LATEST | Attempt 1 | 60 minutes | 42 out of 100 |
Correct answers are no longer available.
Score for this quiz: 42 out of 100
Submitted May 22 at 9:57pm
This attempt took 60 minutes.
IncorrectQuestion 1
0 / 2 pts
When a typical neuron’s membrane potential reaches +30mv, all the following will be true EXCEPT:
the voltage-gated potassium channels will open
the neuron will be in an absolute refractory period
the neuron will have generated an action potential equivalent to 100mv
the voltage-gated chloride channels will open
the voltage-gated sodium channels will close
Question 2
2 / 2 pts
Which of the following opens or closes in response to neurotransmitters binding to their receptors?
sodium voltage-gated channels
sodium/potassium pump
ligand (chemical)-gated channels
calcium voltage-gated channels
leak (passive) channels
IncorrectQuestion 3
0 / 2 pts
All the following are true regarding repolarization EXCEPT:
the membrane potential falls/decreases
the inside of the cell becomes less positive and perhaps even negative
the voltage-gated sodium channels are open
the voltage-gated potassium channels are open
it follows depolarization
Question 4
2 / 2 pts
The propagation of an action potential in a myelinated neuron is referred to as __________.
feedforward activation
temporal summation
spatial summation
covalent modification
saltatory conduction
Question 5
2 / 2 pts
When the graded potentials occurring at several synapses simultaneously are added together, it is referred to as _____________.
saltatory conduction
temporal summation
covalent activation
hyperpolarization
spatial summation
Question 6
2 / 2 pts
‘Hydrolysis’ refers to the breaking apart of a molecule due to the addition of ________.
hydrogen
oxygen
water
a phosphate group
glucose
IncorrectQuestion 7
0 / 2 pts
All the following are true of the neurotransmitters in the class of catecholamines EXCEPT:
they can increase heart rate
they create EPSPs
they may be degraded by catechol-O-methyltransferase (COMT)
they may bind to dopanergic receptors
they decrease the perception of pain
IncorrectQuestion 8
0 / 2 pts
Which of the following can generate IPSPs?
GABA (Gamma-aminobutyric acid)
epinephrine
norepinephrine
dopamine
TRH (thyroid releasing hormone)
IncorrectQuestion 9
0 / 2 pts
All the following are true regarding graded potentials EXCEPT:
they are generated by opening ligand-gated channels
one of them can generate an action potential
they can be spatially summed
they can cause the cell to hyperpolarize
they can be temporally summed
IncorrectQuestion 10
0 / 2 pts
Which of the following will cause an IPSP?
dopamine
enkephalin
epinephrine
norepinephrine
histamine
IncorrectQuestion 11
0 / 2 pts
If a chloride ligand-gated channel is opened, the resting membrane potential will __________.
rise
stay the same
first rise quickly and then drop slowly
decrease
first rise slowly and then drop quickly
IncorrectQuestion 12
0 / 2 pts
The relative refractory phase spans ____________.
only the after-hyperpolarization phase
all the repolarization phase and all the after-hyperpolarization phase
half of the depolarization phase
all the depolarization phase and most of the repolarization phase
the last portion of repolarization and all the after-hyperpolarization phase
IncorrectQuestion 13
0 / 2 pts
Which of the following is TRUE regarding an IPSP?
it will occur if a ligand-gated sodium channel is opened
it can be generated by epinephrine
if it’s large enough, one of them it can lead to an action potential being generated
the neuron’s membrane potential will become more negative
if it’s large enough potassium voltage-gated channels will open
IncorrectQuestion 14
0 / 2 pts
For a neuron to generate an action potential, _________.
the resting membrane potential needs to stay at -70 mv
the membrane potential must become more negative
sodium must be pumped out faster than it comes in
the membrane potential must reach -55 mv
potassium must leave the cell faster than it’s pumped in
IncorrectQuestion 15
0 / 2 pts
In a typical neuron, which of the following must open for the membrane potential to go from -55 mv to +30 mv?
sodium ligand-gated channels
calcium voltage-gated channels
chloride ligand-gated channels
potassium ligand-gated channels
sodium voltage-gated channels
IncorrectQuestion 16
0 / 2 pts
All the following are true regarding neurotransmitters EXCEPT:
they can generate a postsynaptic potential
they may be taken up through the membrane of the postsynaptic cell
they may diffuse away from the synapse
they may be degraded by an enzyme in the postsynaptic cell’s membrane
they may open a chloride ligand-gated channel
Question 17
2 / 2 pts
____________ will bind to nicotinic cholinergic receptors.
Dopamine
Epinephrine
Serotonin
Acetylcholine
Enkephalin
IncorrectQuestion 18
0 / 2 pts
All the following are true regarding the binding of a muscarinic cholinergic receptor EXCEPT:
it will bind either epinephrine or norepinephrine
if bound, it may result in an EPSP
if it is bound, it may open a channel or activate enzymes
it will bind acetylcholine
if bound, it may result in an IPSP
IncorrectQuestion 19
0 / 2 pts
Which of the following is involved in helping to regulate emotions?
substance P
endorphins
histamine
vasopressin (ADH)
acetylcholine
UnansweredQuestion 20
0 / 2 pts
Which of the following is TRUE regarding temporal summation?
consists of postsynaptic potentials generated at the same synapse
cannot be used to open a sodium voltage-gated channel
results only in an IPSP
will never result in an action potential
can only be generated by acetylcholine
IncorrectQuestion 21
0 / 2 pts
The total number of reduced coenzymes available to donate electrons to the electron transport chain is ______________.
a. NADH, 1 FADH2
b. 10 NADH, 2 FADH2
c. 8 NADH, 6 FADH2
d. 6 NADH, 4 FADH2
e. 4 NADH, 2 FADH2
a
b
c
d
e
Question 22
2 / 2 pts
Which of the following is true regarding this equation:
this is the reaction for linking glucose oxidation to the Krebs cycle
this reaction is referred to as glycolysis
this reaction is part of chemiosmotic coupling
this is part of oxidative phosphorylation
a coenzyme is not used in this reaction
IncorrectQuestion 23
0 / 2 pts
Testosterone, estradiol (estrogen) and cortisol are all made from __________.
eicosanoids
thromboxane
chains of amino acids
triglycerides
cholesterol
Question 24
2 / 2 pts
These organelles are responsible for producing energy in the form of ATP from the electron transport chain.
mitochondria
lysosomes
nuclei
ribosomes
peroxisomes
IncorrectQuestion 25
0 / 2 pts
Which of the following organelles is responsible for packaging proteins for export out of the cell?
rough endoplasmic reticulum
mitochondria
ribosomes
Golgi complex
smooth endoplasmic reticulum
IncorrectQuestion 26
0 / 2 pts
All the following are true regarding the Krebs cycle EXCEPT:
it generates reduced coenzymes for the electron-transport chain
it generates one ATP per acetyl-CoA
it occurs in the matrix of the mitochondrion
it is responsible for directly breaking down glucose
it generates carbon dioxide, a waste gas
Question 27
2 / 2 pts
In the cell, ingested materials are digested by the _________.
Golgi apparatus
smooth endoplasmic reticulum
lysosome
mitochondria
centriole
Question 28
2 / 2 pts
Which of the following terms refers to the body’s attempt to maintain a constant internal environment despite an ever-changing external environment?
anatomy
micturition
ecology
pathology
homeostasis
IncorrectQuestion 29
0 / 2 pts
What happened to the ADP?
it was oxidized
it was hydrolyzed
it was reduced
it was phosphorylated
it was catabolized
IncorrectQuestion 30
0 / 2 pts
Which of the following is characterized as having cells that contract involuntarily?
bone
cartilage
skeletal muscle
blood
cardiac muscle
Question 31
2 / 2 pts
Which of the following molecules is characterized by the following formula; CH2O? The molecule is thus said to be in a 1:2:1 ratio.
nucleotide
fatty acid
nucleic acid
steriod
carbohydrate
Question 32
2 / 2 pts
The site of RNA production is the __________.
Golgi complex
nucleolus
smooth endoplasmic reticulum
vault
rough endoplasmic reticulum
IncorrectQuestion 33
0 / 2 pts
All the following are true regarding enzymes EXCEPT:
they are not permanently changed in the reaction
they may bind to more than one substrate
they have substrate specificity
they are consumed in the reaction
they have an active site
IncorrectQuestion 34
0 / 2 pts
From 2 cycles of the Krebs cycle, how many FADH2 molecules are formed?
2
6
10
8
4
Question 35
2 / 2 pts
A group of similar looking cells performing similar functions is referred to as a(n) ___________.
tissue
organism
system
organ
molecule
IncorrectQuestion 36
0 / 2 pts
All the following are examples of the ‘external environment’ EXCEPT:
surroundings external to the skin
food in the gastrointestinal (GI; digestive) tract
the plasma of the blood stream
air in the lungs
urine in the urinary bladder
IncorrectQuestion 37
0 / 2 pts
Which of the following is responsible for detoxifying foreign chemicals?
nucleolus
smooth endoplasmic reticulum
rough endoplasmic reticulum
mitochondria
Golgi complex
Question 38
2 / 2 pts
The reaction in which hydrogen peroxide is converted to carbon dioxide and water occurs in which of the following organelles?
Golgi complex
lysosome
ribosome
vault
peroxisome
Question 39
2 / 2 pts
The __________ is a non-membranous organelle. It is composed of RNA and proteins.
mitochondrion
ribosome
peroxisome
vault
chromatin
Question 40
2 / 2 pts
The ATP synthase molecule works due to the flow of ________ through it.
a. NADH
b. FADH2
c. hydrogen ions
d. electrons
e. carbon dioxide
a
b
c
d
e
IncorrectQuestion 41
0 / 2 pts
Which of the following could be described as a 20-carbon fatty acid with a 5-carbon ring in the middle?
prostaglandin
phospholipid
steroid
triglyceride
transmembrane protein
IncorrectQuestion 42
0 / 2 pts
Of the following molecules, which pair did I tell you were amphipathic?
triglyceride; phospholipid
eicosanoid; transmembrane protein
steroid; triglyceride
phospholipid; transmembrane protein
peripheral protein; eicosanoid
Question 43
2 / 2 pts
Glycolysis and the Linking Step together generate a total of __________ ATPs
0
1
2
4
3
Question 44
2 / 2 pts
The cell membrane contains phospholipids. The “heads” of these molecules are ________ while the “tails” are ___________.
hydrophobic; hydrophilic
hydrophilic; hydrophobic
nonpolar; polar
amphipathic; hydrophilic
made of fatty acids; composed of phosphate groups
IncorrectQuestion 45
0 / 2 pts
All the following are true regarding the cell (plasma) membrane EXCEPT:
it has amphipathic transmembrane proteins
it contains glycolipids and glycoproteins
it has large pores to accommodate RNA movement in and out of the cell
the proteins can “float” in the membrane
cholesterol is in the membrane to increase the membrane’s fluidity
Question 46
2 / 2 pts
Whenever a person starts exercising, carbon dioxide gas increases in the blood stream. Typically, the person’s breathing rate increases in order to “blow off” (decrease) the carbon dioxide to prevent the carbon dioxide level from becoming too high. This is an example of __________.
positive feedback
an anabolic reaction
a condensation reaction
negative feedback
a catabolic reaction
Question 47
2 / 2 pts
Of the following, which is the disaccharide composed of glucose and fructose?
maltose
lactose
galactose
deoxyribose
sucrose
Question 48
2 / 2 pts
If a protein is in an alpha helical form, it is considered to be in a __________ level of protein structure.
primary
secondary
tertiary
quatemary
none of the above
Question 49
2 / 2 pts
Which of the following is responsible for the movement of cilia?
actin
an intermediate filament
a microfilament
microtubules
transmembrane proteins