[WGU D312 ANATOMY AND PHYSIOLOGY STUDY GUIDE SET EXAM] – EXAM-
STYLE QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS |
PLUS RATIONALES | GUARANTEED PASS | 2026/27 LATEST UPDATE | EXAM PREP |
STUDY GUIDE | PRACTICE TEST
1. A patient presents with a traumatic injury to the left side of their brain.
Which of the following deficits would the healthcare provider MOST likely
expect to observe?
A. Impaired spatial awareness on the left side of the body
B. Loss of fine motor control in the left hand
C. Inability to comprehend spoken language
D. Paralysis of the right side of the body
Correct Answer: D. Paralysis of the right side of the body
Rationale: The primary motor cortex, located in the precentral gyrus of the frontal
lobe, controls voluntary movement on the contralateral side of the body. Therefore,
an injury to the left motor cortex would result in motor deficits, such as paralysis or
paresis, on the right side. Option A describes a deficit associated with the right
parietal lobe. Option B describes an ipsilateral deficit, which is not characteristic of
cortical motor control. Option C, receptive aphasia, is associated with Wernicke's
area, typically located in the left temporal lobe, not the primary motor cortex.
2. During a routine physical examination, a clinician auscultates the chest and
hears a high-pitched, musical sound during expiration. This adventitious breath
sound is MOST consistent with which of the following conditions?
A. Pneumonia
B. Pleural effusion
,C. Bronchospasm
D. Atelectasis
Correct Answer: C. Bronchospasm
Rationale: A high-pitched, musical sound during expiration is characteristic of
wheezing, which is produced by air flowing through narrowed airways, such as in
bronchospasm. Pneumonia typically presents with crackles (A). Pleural effusion
often leads to diminished or absent breath sounds (B). Atelectasis commonly
produces crackles that do not clear with coughing (D).
3. The movement of glucose into a cell against its concentration gradient,
utilizing a carrier protein and energy derived from ATP, is an example of which
type of transport?
A. Facilitated diffusion
B. Primary active transport
C. Secondary active transport
D. Simple diffusion
Correct Answer: B. Primary active transport
Rationale: Primary active transport is characterized by the movement of molecules
against their concentration gradient (uphill) using a carrier protein and the direct
hydrolysis of ATP for energy. Facilitated diffusion (A) also uses a carrier protein but
moves substances down their gradient without energy. Secondary active transport
(C) uses the energy from an ion gradient established by primary active transport.
Simple diffusion (D) does not use a carrier protein or energy.
4. A patient with a history of chronic liver disease is at an increased risk for
bleeding. This is MOST directly related to the liver's role in which of the
,following processes?
A. Production of albumin
B. Synthesis of clotting factors
C. Detoxification of drugs
D. Storage of glycogen
Correct Answer: B. Synthesis of clotting factors
Rationale: The liver is the primary site for synthesizing most clotting factors,
including fibrinogen, prothrombin, and factors VII, IX, and X. In liver disease,
impaired synthesis of these factors leads to a coagulopathy and an increased risk of
bleeding. While the liver produces albumin (A), its primary function is maintaining
oncotic pressure, not hemostasis. Detoxification (C) and glycogen storage (D) are
important liver functions but are not directly responsible for the increased bleeding
risk described.
5. Which of the following best describes the role of the sodium-potassium
pump in maintaining the resting membrane potential of a neuron?
A. It actively transports 3 sodium ions into the cell and 2 potassium ions out,
creating a net negative charge inside.
B. It actively transports 3 potassium ions into the cell and 2 sodium ions out,
creating a net positive charge inside.
C. It actively transports 3 sodium ions out of the cell and 2 potassium ions in,
creating a net negative charge inside.
D. It actively transports 3 potassium ions out of the cell and 2 sodium ions in,
creating a net positive charge inside.
, Correct Answer: C. It actively transports 3 sodium ions out of the cell and 2
potassium ions in, creating a net negative charge inside.
Rationale: The sodium-potassium pump (Na+/K+-ATPase) is an essential active
transport mechanism that maintains the resting membrane potential. It pumps
three sodium ions (Na+) out of the cell for every two potassium ions (K+) it pumps
in, consuming ATP. This unequal exchange creates a net loss of positive charges
from the intracellular space, contributing to the negative resting membrane
potential. Options A and D describe incorrect directions for ion movement, and
option B describes the wrong net charge inside the cell.
6. In a patient with severe dehydration, the renin-angiotensin-aldosterone
system (RAAS) is activated. This activation ultimately leads to which of the
following physiological responses to restore blood volume?
A. Vasodilation of afferent arterioles and increased sodium excretion
B. Vasodilation of efferent arterioles and increased potassium retention
C. Vasoconstriction of afferent arterioles and increased water excretion
D. Vasoconstriction of efferent arterioles and increased sodium reabsorption
Correct Answer: D. Vasoconstriction of efferent arterioles and increased sodium
reabsorption
Rationale: Activation of the RAAS in response to decreased blood volume or
pressure leads to several compensatory mechanisms. Angiotensin II is a potent
vasoconstrictor and specifically causes vasoconstriction of the efferent arteriole,
which helps maintain glomerular filtration pressure. It also stimulates the release of
aldosterone from the adrenal cortex, which promotes sodium and water
reabsorption in the distal convoluted tubule and collecting duct. This combination
of actions increases blood volume and pressure.
STYLE QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS |
PLUS RATIONALES | GUARANTEED PASS | 2026/27 LATEST UPDATE | EXAM PREP |
STUDY GUIDE | PRACTICE TEST
1. A patient presents with a traumatic injury to the left side of their brain.
Which of the following deficits would the healthcare provider MOST likely
expect to observe?
A. Impaired spatial awareness on the left side of the body
B. Loss of fine motor control in the left hand
C. Inability to comprehend spoken language
D. Paralysis of the right side of the body
Correct Answer: D. Paralysis of the right side of the body
Rationale: The primary motor cortex, located in the precentral gyrus of the frontal
lobe, controls voluntary movement on the contralateral side of the body. Therefore,
an injury to the left motor cortex would result in motor deficits, such as paralysis or
paresis, on the right side. Option A describes a deficit associated with the right
parietal lobe. Option B describes an ipsilateral deficit, which is not characteristic of
cortical motor control. Option C, receptive aphasia, is associated with Wernicke's
area, typically located in the left temporal lobe, not the primary motor cortex.
2. During a routine physical examination, a clinician auscultates the chest and
hears a high-pitched, musical sound during expiration. This adventitious breath
sound is MOST consistent with which of the following conditions?
A. Pneumonia
B. Pleural effusion
,C. Bronchospasm
D. Atelectasis
Correct Answer: C. Bronchospasm
Rationale: A high-pitched, musical sound during expiration is characteristic of
wheezing, which is produced by air flowing through narrowed airways, such as in
bronchospasm. Pneumonia typically presents with crackles (A). Pleural effusion
often leads to diminished or absent breath sounds (B). Atelectasis commonly
produces crackles that do not clear with coughing (D).
3. The movement of glucose into a cell against its concentration gradient,
utilizing a carrier protein and energy derived from ATP, is an example of which
type of transport?
A. Facilitated diffusion
B. Primary active transport
C. Secondary active transport
D. Simple diffusion
Correct Answer: B. Primary active transport
Rationale: Primary active transport is characterized by the movement of molecules
against their concentration gradient (uphill) using a carrier protein and the direct
hydrolysis of ATP for energy. Facilitated diffusion (A) also uses a carrier protein but
moves substances down their gradient without energy. Secondary active transport
(C) uses the energy from an ion gradient established by primary active transport.
Simple diffusion (D) does not use a carrier protein or energy.
4. A patient with a history of chronic liver disease is at an increased risk for
bleeding. This is MOST directly related to the liver's role in which of the
,following processes?
A. Production of albumin
B. Synthesis of clotting factors
C. Detoxification of drugs
D. Storage of glycogen
Correct Answer: B. Synthesis of clotting factors
Rationale: The liver is the primary site for synthesizing most clotting factors,
including fibrinogen, prothrombin, and factors VII, IX, and X. In liver disease,
impaired synthesis of these factors leads to a coagulopathy and an increased risk of
bleeding. While the liver produces albumin (A), its primary function is maintaining
oncotic pressure, not hemostasis. Detoxification (C) and glycogen storage (D) are
important liver functions but are not directly responsible for the increased bleeding
risk described.
5. Which of the following best describes the role of the sodium-potassium
pump in maintaining the resting membrane potential of a neuron?
A. It actively transports 3 sodium ions into the cell and 2 potassium ions out,
creating a net negative charge inside.
B. It actively transports 3 potassium ions into the cell and 2 sodium ions out,
creating a net positive charge inside.
C. It actively transports 3 sodium ions out of the cell and 2 potassium ions in,
creating a net negative charge inside.
D. It actively transports 3 potassium ions out of the cell and 2 sodium ions in,
creating a net positive charge inside.
, Correct Answer: C. It actively transports 3 sodium ions out of the cell and 2
potassium ions in, creating a net negative charge inside.
Rationale: The sodium-potassium pump (Na+/K+-ATPase) is an essential active
transport mechanism that maintains the resting membrane potential. It pumps
three sodium ions (Na+) out of the cell for every two potassium ions (K+) it pumps
in, consuming ATP. This unequal exchange creates a net loss of positive charges
from the intracellular space, contributing to the negative resting membrane
potential. Options A and D describe incorrect directions for ion movement, and
option B describes the wrong net charge inside the cell.
6. In a patient with severe dehydration, the renin-angiotensin-aldosterone
system (RAAS) is activated. This activation ultimately leads to which of the
following physiological responses to restore blood volume?
A. Vasodilation of afferent arterioles and increased sodium excretion
B. Vasodilation of efferent arterioles and increased potassium retention
C. Vasoconstriction of afferent arterioles and increased water excretion
D. Vasoconstriction of efferent arterioles and increased sodium reabsorption
Correct Answer: D. Vasoconstriction of efferent arterioles and increased sodium
reabsorption
Rationale: Activation of the RAAS in response to decreased blood volume or
pressure leads to several compensatory mechanisms. Angiotensin II is a potent
vasoconstrictor and specifically causes vasoconstriction of the efferent arteriole,
which helps maintain glomerular filtration pressure. It also stimulates the release of
aldosterone from the adrenal cortex, which promotes sodium and water
reabsorption in the distal convoluted tubule and collecting duct. This combination
of actions increases blood volume and pressure.
