WGU D313 Anatomy and Physiology 2 Objective
Assessment (OA) Practice Test | Comprehensive
Review for Final Examination with Actual Exam
Questions, Verified Correct Answers and Rationales |
Latest Update 2026/2027 - Already Graded A+
Question 1
Where does internal respiration occur?
A. Between the blood and the pleural fluid
B. Between the cells and blood of systemic capillaries
C. Between the atmosphere and the alveoli
D. Between the alveoli and the pulmonary capillaries
Answer: B
Rationale: Internal respiration is the exchange of gases between the blood in systemic
capillaries and the body's cells. Oxygen diffuses from the blood into the cells, and carbon
dioxide diffuses from the cells into the blood.
Question 2
What increases blood pressure?
A. Higher blood viscosity
B. Higher hematocrit
C. Lower blood viscosity
D. Higher hematocrit
Answer: A
Rationale: Higher blood viscosity (thickness) increases resistance to flow, which
increases blood pressure.
pg. 1
,Question 3
Which statement accurately describes the bronchial tree?
A. The bronchioles are lined with cartilage to keep them open
B. The right primary bronchus is more vertical and wider than the left
C. The left primary bronchus is wider and more vertical than the right
D. The bronchial tree consists of a single tube that splits into two branches
Answer: B
Rationale: The right primary bronchus is shorter, wider, and more vertical than the left,
which makes it more susceptible to aspiration of foreign objects.
Question 4
Which organ removes old or damaged red blood cells and pathogens within the blood?
A. Liver
B. Pancreas
C. Kidney
D. Spleen
Answer: D
Rationale: The spleen is the largest lymphoid organ and serves as a filter for blood,
removing old or damaged red blood cells and pathogens.
Question 5
Pyrogens are chemicals produced by bacteria or cells of the immune system. Which part
of the brain is affected by pyrogens?
A. Thalamus
B. Epithalamus
C. Cerebellum
D. Hypothalamus
Answer: D
Rationale: Pyrogens affect the hypothalamus, which serves as the body's thermostat.
Pyrogens reset the hypothalamic set point to a higher temperature, causing fever.
pg. 2
,Question 6
Which structure is the site of blood vessels, lymph vessels, and the nerves of the ovary?
A. Glomerulus
B. Renal hilum
C. Infundibulum
D. Central medulla
Answer: B
Rationale: The renal hilum is the entry and exit site for blood vessels, lymph vessels,
nerves, and the ureter of the kidney.
Question 7
What vessels carry blood that has just been filtered in the renal corpuscle?
A. Peritubular capillaries
B. Afferent arterioles
C. Efferent arterioles
D. Arcuate arteries
Answer: C
Rationale: Efferent arterioles carry blood that has been filtered in the renal corpuscle
(glomerulus) away from the glomerulus to the peritubular capillaries.
Question 8
Which event takes place during atrial diastole?
A. The left and right ventricles contract to pump blood out
B. The atrioventricular valves open to allow blood into the ventricles
C. Both the left and right atrial chambers fill with blood
D. The semilunar valves close to prevent backflow into the atria
Answer: C
Rationale: During atrial diastole, the atria are relaxed and filling with blood from the
venae cavae and pulmonary veins.
Question 9
Which structure separates the vagina from the body of the uterus?
pg. 3
, A. Cervix
B. Fallopian tube
C. Ovary
D. Endometrium
Answer: A
Rationale: The cervix is the lower portion of the uterus that connects the body of the
uterus to the vagina.
Question 10
Which part of the male reproductive tract is cut and sealed as part of a vasectomy?
A. Seminiferous tubules
B. Epididymis
C. Ductus deferens
D. Seminal Vesicle
Answer: C
Rationale: A vasectomy involves cutting and sealing the ductus deferens (vas deferens),
which prevents sperm from being transported from the epididymis to the ejaculatory duct.
Question 11
What is the function of the bladder?
A. Regulation of lymphocyte production
B. Regulation of erythrocyte production
C. Storage of urine
D. Regulation of blood volume
Answer: C
Rationale: The urinary bladder stores urine until it is expelled from the body during
urination.
Question 12
How does carbon monoxide cause death?
A. It increases the viscosity of the blood, slowing circulation
B. It directly destroys the red blood cells, preventing oxygen transport
pg. 4
Assessment (OA) Practice Test | Comprehensive
Review for Final Examination with Actual Exam
Questions, Verified Correct Answers and Rationales |
Latest Update 2026/2027 - Already Graded A+
Question 1
Where does internal respiration occur?
A. Between the blood and the pleural fluid
B. Between the cells and blood of systemic capillaries
C. Between the atmosphere and the alveoli
D. Between the alveoli and the pulmonary capillaries
Answer: B
Rationale: Internal respiration is the exchange of gases between the blood in systemic
capillaries and the body's cells. Oxygen diffuses from the blood into the cells, and carbon
dioxide diffuses from the cells into the blood.
Question 2
What increases blood pressure?
A. Higher blood viscosity
B. Higher hematocrit
C. Lower blood viscosity
D. Higher hematocrit
Answer: A
Rationale: Higher blood viscosity (thickness) increases resistance to flow, which
increases blood pressure.
pg. 1
,Question 3
Which statement accurately describes the bronchial tree?
A. The bronchioles are lined with cartilage to keep them open
B. The right primary bronchus is more vertical and wider than the left
C. The left primary bronchus is wider and more vertical than the right
D. The bronchial tree consists of a single tube that splits into two branches
Answer: B
Rationale: The right primary bronchus is shorter, wider, and more vertical than the left,
which makes it more susceptible to aspiration of foreign objects.
Question 4
Which organ removes old or damaged red blood cells and pathogens within the blood?
A. Liver
B. Pancreas
C. Kidney
D. Spleen
Answer: D
Rationale: The spleen is the largest lymphoid organ and serves as a filter for blood,
removing old or damaged red blood cells and pathogens.
Question 5
Pyrogens are chemicals produced by bacteria or cells of the immune system. Which part
of the brain is affected by pyrogens?
A. Thalamus
B. Epithalamus
C. Cerebellum
D. Hypothalamus
Answer: D
Rationale: Pyrogens affect the hypothalamus, which serves as the body's thermostat.
Pyrogens reset the hypothalamic set point to a higher temperature, causing fever.
pg. 2
,Question 6
Which structure is the site of blood vessels, lymph vessels, and the nerves of the ovary?
A. Glomerulus
B. Renal hilum
C. Infundibulum
D. Central medulla
Answer: B
Rationale: The renal hilum is the entry and exit site for blood vessels, lymph vessels,
nerves, and the ureter of the kidney.
Question 7
What vessels carry blood that has just been filtered in the renal corpuscle?
A. Peritubular capillaries
B. Afferent arterioles
C. Efferent arterioles
D. Arcuate arteries
Answer: C
Rationale: Efferent arterioles carry blood that has been filtered in the renal corpuscle
(glomerulus) away from the glomerulus to the peritubular capillaries.
Question 8
Which event takes place during atrial diastole?
A. The left and right ventricles contract to pump blood out
B. The atrioventricular valves open to allow blood into the ventricles
C. Both the left and right atrial chambers fill with blood
D. The semilunar valves close to prevent backflow into the atria
Answer: C
Rationale: During atrial diastole, the atria are relaxed and filling with blood from the
venae cavae and pulmonary veins.
Question 9
Which structure separates the vagina from the body of the uterus?
pg. 3
, A. Cervix
B. Fallopian tube
C. Ovary
D. Endometrium
Answer: A
Rationale: The cervix is the lower portion of the uterus that connects the body of the
uterus to the vagina.
Question 10
Which part of the male reproductive tract is cut and sealed as part of a vasectomy?
A. Seminiferous tubules
B. Epididymis
C. Ductus deferens
D. Seminal Vesicle
Answer: C
Rationale: A vasectomy involves cutting and sealing the ductus deferens (vas deferens),
which prevents sperm from being transported from the epididymis to the ejaculatory duct.
Question 11
What is the function of the bladder?
A. Regulation of lymphocyte production
B. Regulation of erythrocyte production
C. Storage of urine
D. Regulation of blood volume
Answer: C
Rationale: The urinary bladder stores urine until it is expelled from the body during
urination.
Question 12
How does carbon monoxide cause death?
A. It increases the viscosity of the blood, slowing circulation
B. It directly destroys the red blood cells, preventing oxygen transport
pg. 4
