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NSG 3280 EXAM 1 & 2 PRACTICE
TEST (2027 UPDATE) GRADED A+ |
100% PASS GUARANTEED | JUST
RELEASED
PART 1: CELLULAR BIOLOGY & TRANSPORT
Question 1
What is the primary function of the Na+/K+ ATPase pump in a cell?
A) To move sodium and potassium out of the cell
B) To maintain the cell's resting membrane potential by pumping sodium
out and potassium in
C) To pump water out of the cell to prevent lysis
D) To facilitate the movement of large molecules into the cell
Verified Answer: B
Rationale: The Na+/K+ ATPase pump actively transports three sodium
ions out of the cell and two potassium ions into the cell, using ATP. This
action helps maintain the cell's negative resting membrane potential and
is critical for many cellular functions.
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Question 2
Which type of transport moves molecules from an area of high
concentration to an area of low concentration without the use of energy
or a carrier protein?
A) Active transport
B) Facilitated diffusion
C) Simple diffusion
D) Endocytosis
Verified Answer: C
Rationale: Simple diffusion is a passive process where molecules (e.g.,
oxygen and carbon dioxide) move across the lipid bilayer directly,
driven by the concentration gradient. It does not require cellular energy
or a carrier protein.
Question 3
If a cell is placed in a hypotonic solution, what will happen to the cell?
A) It will shrink
B) It will swell and potentially burst
C) It will remain unchanged
D) It will pump water out
Verified Answer: B
Rationale: In a hypotonic solution, the extracellular fluid has a lower
solute concentration than the cell's cytoplasm. Water will move into the
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cell via osmosis, causing it to swell. This can be a good mnemonic: a
cell in a "hypotonic" environment becomes full and "fat like a hippo".
Question 4
Insulin is secreted from the beta cells of the pancreas by which process?
A) Phagocytosis
B) Pinocytosis
C) Exocytosis
D) Active transport
Verified Answer: C
Rationale: Exocytosis is the process by which cells release large
molecules (like proteins and hormones) into the extracellular space. A
vesicle containing the substance fuses with the cell membrane, releasing
its contents.
Question 5
What is the correct sequence of events in phagocytosis?
A) Ingestion → attachment → phagosome → phagolysosome →
destruction → elimination
B) Attachment → ingestion → phagosome → phagolysosome →
destruction → elimination
C) Attachment → phagosome → ingestion → phagolysosome →
destruction → elimination
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D) Phagosome → attachment → ingestion → phagolysosome →
destruction → elimination
Verified Answer: B
Rationale: Phagocytosis is a specific type of endocytosis. The correct
sequence is: Attachment of the particle to the cell membrane, Ingestion
(the cell membrane engulfs the particle), formation of a Phagosome,
fusion with a lysosome to form a Phagolysosome, Destruction of the
particle, and finally Elimination of the waste.
Question 6
Which type of membrane channel responds to the binding of a signaling
molecule, such as a neurotransmitter?
A) Voltage-gated channels
B) Ligand-gated channels
C) Mechanically gated channels
D) Leak channels
Verified Answer: B
Rationale: Ligand-gated channels open or close in response to a
chemical signal (the ligand) binding to a receptor on the channel protein.
Question 7
Which type of membrane channel responds to changes in the cell's
electrical potential?
NSG 3280 EXAM 1 & 2 PRACTICE
TEST (2027 UPDATE) GRADED A+ |
100% PASS GUARANTEED | JUST
RELEASED
PART 1: CELLULAR BIOLOGY & TRANSPORT
Question 1
What is the primary function of the Na+/K+ ATPase pump in a cell?
A) To move sodium and potassium out of the cell
B) To maintain the cell's resting membrane potential by pumping sodium
out and potassium in
C) To pump water out of the cell to prevent lysis
D) To facilitate the movement of large molecules into the cell
Verified Answer: B
Rationale: The Na+/K+ ATPase pump actively transports three sodium
ions out of the cell and two potassium ions into the cell, using ATP. This
action helps maintain the cell's negative resting membrane potential and
is critical for many cellular functions.
,2 | Page
Question 2
Which type of transport moves molecules from an area of high
concentration to an area of low concentration without the use of energy
or a carrier protein?
A) Active transport
B) Facilitated diffusion
C) Simple diffusion
D) Endocytosis
Verified Answer: C
Rationale: Simple diffusion is a passive process where molecules (e.g.,
oxygen and carbon dioxide) move across the lipid bilayer directly,
driven by the concentration gradient. It does not require cellular energy
or a carrier protein.
Question 3
If a cell is placed in a hypotonic solution, what will happen to the cell?
A) It will shrink
B) It will swell and potentially burst
C) It will remain unchanged
D) It will pump water out
Verified Answer: B
Rationale: In a hypotonic solution, the extracellular fluid has a lower
solute concentration than the cell's cytoplasm. Water will move into the
,3 | Page
cell via osmosis, causing it to swell. This can be a good mnemonic: a
cell in a "hypotonic" environment becomes full and "fat like a hippo".
Question 4
Insulin is secreted from the beta cells of the pancreas by which process?
A) Phagocytosis
B) Pinocytosis
C) Exocytosis
D) Active transport
Verified Answer: C
Rationale: Exocytosis is the process by which cells release large
molecules (like proteins and hormones) into the extracellular space. A
vesicle containing the substance fuses with the cell membrane, releasing
its contents.
Question 5
What is the correct sequence of events in phagocytosis?
A) Ingestion → attachment → phagosome → phagolysosome →
destruction → elimination
B) Attachment → ingestion → phagosome → phagolysosome →
destruction → elimination
C) Attachment → phagosome → ingestion → phagolysosome →
destruction → elimination
, 4 | Page
D) Phagosome → attachment → ingestion → phagolysosome →
destruction → elimination
Verified Answer: B
Rationale: Phagocytosis is a specific type of endocytosis. The correct
sequence is: Attachment of the particle to the cell membrane, Ingestion
(the cell membrane engulfs the particle), formation of a Phagosome,
fusion with a lysosome to form a Phagolysosome, Destruction of the
particle, and finally Elimination of the waste.
Question 6
Which type of membrane channel responds to the binding of a signaling
molecule, such as a neurotransmitter?
A) Voltage-gated channels
B) Ligand-gated channels
C) Mechanically gated channels
D) Leak channels
Verified Answer: B
Rationale: Ligand-gated channels open or close in response to a
chemical signal (the ligand) binding to a receptor on the channel protein.
Question 7
Which type of membrane channel responds to changes in the cell's
electrical potential?
