Physiology 001 - Introduction to Human Physiology » Spring 2023 » Lecture 2 Quiz
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Question #1
At rest, the greater concentration of ____ is greater outside the cell than inside the cell.
A.
Na+
B.
K+
Question #2
_______ solutions have a lower concentration of nonpenetrating solutes as normal extracellular fluid
A.
Isotonic
B.
Hypertonic
C.
Hypotonic
Question #3
pumps transport substances against their concentration gradient
A.
True
B.
False
Question #4
There can be osmosis only if the membrane is selectively permeable to water _______ permeable to the solute.
A.
but not
B.
and also
Question #5
Water is considered a polar substance
A.
True
B.
False
Question #6
Stimulus 1 is applied to cell X and an action potential is observed. A second stimulus is applied to the same cell but the cell does not produce a second action potential not matter how strong that stimulus is. The cell is said to be in its ________________.
A.
absolute refractory period.
B.
relative refractory period.
Question #7
An example of a hydro-soluble substance:
A.
NaCl
B.
O2
Question #8
Cotransporters (symporters) move molecules in the same direction
A.
True
B.
False
Question #9
Ions diffuse until the membrane reaches their Equilibrium Potential.
A.
True
B.
False
Question #10
Na+ Equilibrium Potential is ___
A.
negative
B.
positive
Question #11
After giving a certain drug to a patient, the receptors for a neurotransmitter have decreased. This is an example of
A.
up regulation
B.
down regulation
Question #12
Watery spaces that allow free movement of water, selected ions and molecules are designed as:
A.
Carrier Proteins
B.
Transporters
C.
Channel Proteins
Question #13
Facilitated diffusion uses carriers to transport substances against their concentration gradient
A.
True
B.
False
Question #14
During the depolarization, the channels of ___ open very fast.
A.
Na+
B.
K+
Question #15
Lipid-soluble substances can penetrate this lipid bilayer.
A.
True
B.
False
Question #16
The membrane act as barrier against movement of water molecules and water-soluble substances
A.
True
B.
False
Question #17
Polar or ionic substances are water soluble.
A.
False
B.
True
Question #18
The Na+/K+-ATPase is an example of a:
A.
channel protein
B.
pump
C.
membrane receptor
Question #19
K+ Equilibrium Potential is ___
A.
negative
B.
positive
Question #20
Hydrophilic solutes (e.g., Na+) cross the membrane readily without the help of any of protein.
A.
False
B.
True
Question #21
Channels are selective: they let some substances pass easily but exclude other substances.
A.
False
B.
True
Question #22
______ _____ uses energy (ATP) to move molecules against the concentration gradient
A.
Active transport
B.
Simple diffusion
C.
Facilitated diffusion
Question #23
The Nerst potential is the potential ___ the cell.
A.
outside
B.
inside
Question #24
Na/K+ ATPase has _ binding sites for potassium on _
A.
two; inside
B.
three; inside
C.
two; outside
D.
three; outside
Question #25
Channel Proteins ___ to the substances that help move.
A.
bind
B.
do not bind
Question #26
Insulin decreases the expression of GLUT 4 in skeletal muscle cells
A.
True
B.
False
Question #27
Channels are specific, allowing all substances to pass equally well.
A.
True
B.
False
Question #28
Water-soluble substance tend to bind to receptors located
A.
inside the cell.
B.
at the plasma membrane.
C.
Question #29
phagocytosis may be seen as “cellular ______”; likewise, pinocytosis is similar to cellular _____”
A.
eating; drinking
B.
drinking; eating.
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