Quiz
1 Answer Key
1. The Na ion channel is an example of how
molecules are transferred across the phospholipid bilayer by the process of
a. simple
diffusion
b. facilitated
transport
c. secondary
active transport
d. primary
active transport
ANSWER: b.
2. If you placed one of your cheek cells (given:
The ICF = 150 mM NaCl ) in a solution of 300 mM
glucose, and you assume neither compound could permeate the PL bilayer, through
the process of osmosis your cell would
a. crenate
b.
lyse
c. be
happy as a clam (normal cell volume)
d.
cannot determine by the
provided information
ANSWER: c.
3. The Na/K ATPase pump uses a method called
__________________ __________________
or
successive phosphorylation/dephosphorylation cycles to change its configuration
and pump ions against their concentration gradients.
a. phosphatase
enzymes
b. secondary
active transport
c. molecular
peristalis
d. brownian movement
e. chemiosmotic
hypothesis
ANSWER: c.
4. T or F
All cells
have a negative resting membrane potential and thus have the capacity to
generate an action potential.
a. TRUE
b. FALSE
ANSWER: b.
5. Which of the following physiological
processes requires no ATP expenditure?
a. endocytosis
b. exocytosis
c. osmosis
d. facilitated
diffusion
e. two
of the above
ANSWER: e.
6. Which of the following organic molecules
would be classified as a protein?
a. glycogen
b. molecules
that contain free fatty acids
c. molecules
that are produced from peptide bond formations
d. steroids
e. DNA
ANSWER: c.
7. If a cell had the following ionic
concentrations and permeabilities, about at what voltage would you predict an
action potential would change polarity (peak of the action potential spike)?
HINT: You
can decide whether to use Nernst or Goldman.
PK = 10
PNa =
10,000
Assume you
are computing for my pug Jack (mammalian temperatures)
[K+]o = 40 mM
[K+]i = 365 mM
[Na+]o = 310 mM
[Na+]i = 55 mM
a. 45
mV
b. 52
mV
c. 58
mV
d. 41
mV
e. -58
mV
ANSWER: a.
8. If the resting potential of the cell in #7
was -85 mV, at what voltage would this action potential fire fully, given the
all-or-none principle? HINT: Threshold.
a. around
-64 mV
b. around
-60 mV
c. around
-66 mV
d. around
-84 mV
e. cannot
be determined with the data provided
ANSWER: c.
9. Which phase of the action potential is driven
by the underlying activity (gated open) of K channels without any contribution
of Na channel conformational changes?
a. depolarization
b. repolarization
c. hyperpolarization
d. latency
e. the
resting membrane potential
ANSWER: c.
10. Which of the following properties is
associated with the Action Potential?
a. they
are an all-or-none process
b. they
decrement in amplitude the further down the axon they travel
c. their
threshold activity is mediated by the space constant or lambda
d. they
have increased frequency when potassium channels are gated open
e. they
can fire during the ARP phase
ANSWER: a.
11. If an action potential (AP) reaches
threshold, where in the neuron will the AP “spike” be initiated?
a. the
dendrite
b. the
soma
c. the
axon hillock
d.
the synaptic terminals
e. the
sodium/potassium ATPase pump
ANSWER: c.
Quiz 2
Answer Key
1. Which of the
following types of muscles are striated and voluntary?
a. skeletal
b. cardiac
c. smooth
d. b and c
e. a and b
ANSWER:
a
2.
A single muscle CELL is known as
a. a sarcomere
b. a myofibril
c. one actin and one myosin filament
d. a motor unit
e. a muscle fiber
ANSWER:
e.
3.
Which of the following muscle bands bisects the H band to anchor
the thick myosin filament?
a. A band
b. Z band
c. M band
d. I band
e. A and I bands
ANSWER:
c.
4.
Which of the following "contractile proteins" functions
as a calcium binding protein to permit or inhibit the sliding filament theory
of skeletal muscle contraction?
a. actin
b. troponin
c. tropomysin
d.
tropoactin
e. myosin
ANSWER:
b.
5.
In relation to skeletal muscle mechanics, during which phase of
the twitch would the Ryanodine Receptor have its highest activity?
a. latency period
b. contraction
c. relaxation
d. summation
e. tetany
ANSWER:
b.
6.
During a contraction, the length of the sarcomere shortens due to
a decrease in size of ALL but which band?
a. A band
b. Z band
c. H band
d. I band
e. All of the above will shorten
ANSWER: a.
7.
Which of the following spinal nerves is correctly paired?
a. coccygeal - neck
b. thoracic - stomach
c. cervical - tail
d. lumbar - heart
e. sacral – pelvic
ANSWER:
e.
8.
T (A) or F (B)
When actin and myosin are touching in a cross bridge formation, then the lowest free energy conformation for the hinge region of myosin is at a 90 degree angle.
ANSWER:
b (F)
9.
If you damaged your 7th cranial nerve, you would have
trouble
a. seeing your pizza
b. tasting your pizza
c. smelling your pizza
d. chewing your pizza
e. swallowing your pizza
ANSWER:
b.
10. Based upon your
knowledge of the 3 classifications of muscle, which of the following would
maintain dimensions against applied loads, be under the control of the
autonomic nervous system, and lack true sacromeres?
a. your heart
b. your thigh
c. your liver
d. your blood vessels
e. two of the above
f. none of the above
ANSWER:
e.
11.
What type of neurons are contained in the dorsal horn of the
spinal cord?
a. afferent neurons from your hand when it
is touched
b. neurons leading to your skeletal
muscles, like your thigh
c. motor neurons that supply your heart
and gut
d. interneurons leading to your motor
cortex
e. polysynaptic connections to your exocrine glands
ANSWER: a.
EXAM 1 Answer Key:
1.e
2.c
3.a
4c.
5.e
6.e
7.d
8.e
9.b
10.c
11.d
12.d
13.b
14.c
15.c
16.d
17.c
18.d
19.c
20.a
21.c
22.b
23.c
24.b
25.1
26.a
27.d
28.e
29.d.
30.a
31.d
32.c
33.d
34.b
35.d
36.b
37.b
38.c
39.a
40.d.
41.b
42.a
43.a
44.a
45.a
46.a
47.b
48.b
49.b
50.a