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2025 WGU D313 Anatomy and Physiology | Trusted Objective Assessment Questions with Answers (westernGU)
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2025 WGU D313 Anatomy and Physiology | Trusted Objective Assessment Questions with Answers (westernGU)
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WGU D313 Anatomy and Physiology ObjectiveAssessment 2025 | Up-to-Date Exam
Questions with Detailed Answers
1. Question:
Which of the following structures is responsible for producing
cerebrospinal fluid (CSF)?
A) Cerebrum
B) Medulla oblongata
C) Choroid plexus
D) Pineal gland
Answer: C) Choroid plexus
Rationale: The choroid plexus is responsible for producing
cerebrospinal fluid (CSF) in the brain. It is located in the ventricles and
plays a crucial role in maintaining the brain’s homeostasis by producing
and circulating CSF.
2. Question:
What is the primary function of the alveoli in the lungs?
A) Gas exchange
B) Protect the lungs from infection
C) Produce surfactant
D) Warm and filter air
Answer: A) Gas exchange
,Rationale: The alveoli are tiny air sacs in the lungs where the exchange
of oxygen and carbon dioxide occurs between the blood and the air.
This process is essential for respiration and the body’s gas exchange.
3. Question:
Which part of the neuron is responsible for transmitting electrical
impulses away from the cell body?
A) Dendrite
B) Axon
C) Soma
D) Synapse
Answer: B) Axon
Rationale: The axon is the long, slender projection of a neuron that
transmits electrical impulses away from the cell body to other neurons,
muscles, or glands.
4. Question:
What is the main function of the kidneys in the urinary system?
A) To produce urine
B) To filter blood and remove waste
C) To regulate blood sugar levels
D) To store urine
Answer: B) To filter blood and remove waste
Rationale: The kidneys filter the blood, removing waste products and
excess substances, which are excreted as urine. They also regulate fluid
balance, electrolytes, and blood pressure.
,5. Question:
Which of the following is the correct sequence of the heart’s
conduction system?
A) AV node → Bundle of His → SA node → Purkinje fibers
B) SA node → AV node → Bundle of His → Purkinje fibers
C) Purkinje fibers → SA node → AV node → Bundle of His
D) AV node → Purkinje fibers → SA node → Bundle of His
Answer: B) SA node → AV node → Bundle of His → Purkinje fibers
Rationale: The heart’s conduction system starts at the SA node
(sinoatrial node), which generates the electrical impulse, followed by
the AV node (atrioventricular node), the Bundle of His, and finally the
Purkinje fibers, which distribute the impulse throughout the ventricles.
6. Question:
Which of the following hormones is secreted by the pancreas to
regulate blood glucose levels?
A) Insulin
B) Thyroxine
C) Cortisol
D) Estrogen
Answer: A) Insulin
Rationale: Insulin is secreted by the pancreas to lower blood glucose
levels by facilitating the uptake of glucose into cells for energy and
storage.
, 7. Question:
Which of the following bones is part of the axial skeleton?
A) Humerus
B) Femur
C) Rib
D) Scapula
Answer: C) Rib
Rationale: The axial skeleton consists of the bones that form the central
axis of the body, including the skull, vertebral column, and ribs. The rib
is part of the axial skeleton.
8. Question:
Which of the following structures is located in the thoracic cavity?
A) Liver
B) Lungs
C) Stomach
D) Kidneys
Answer: B) Lungs
Rationale: The thoracic cavity contains the lungs, heart, and other
structures. The liver, stomach, and kidneys are located in the abdominal
cavity.
9. Question:
What is the primary role of the liver in digestion?
A) Produces bile to emulsify fats
B) Absorbs nutrients from digested food
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