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WGU D312 A&P Practice Exam NEWEST 2026 ACTUAL EXAM TEST- COMPLETE REAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
(MOST RECENT!!)
1
Which organelle produces most of the cell’s ATP?
Answer:
Mitochondria
Rationale:
Mitochondria perform cellular respiration, converting glucose and oxygen into ATP, the energy
currency of the cell.
2
Which type of tissue lines body surfaces and forms glands?
Answer:
Epithelial tissue
Rationale:
Epithelial tissue covers organs and cavities and forms secretory glands.
3
Which connective tissue stores fat?
Answer:
Adipose tissue
Rationale:
Adipose cells store energy as fat and provide insulation and cushioning.
2026 2027 GRADED A+
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4
Which muscle type is involuntary and found in hollow organs?
Answer:
Smooth muscle
Rationale:
Smooth muscle contracts without conscious control to move substances through organs like
intestines and blood vessels.
5
Which part of the neuron transmits impulses away from the cell body?
Answer:
Axon
Rationale:
The axon carries electrical signals to other neurons, muscles, or glands.
6
The functional unit of the kidney is:
Answer:
Nephron
Rationale:
Nephrons filter blood, reabsorb water and nutrients, and produce urine.
7
Which layer of the skin contains sweat glands and hair follicles?
Answer:
Dermis
Rationale:
The dermis contains vascular tissue, glands, and sensory structures.
2026 2027 GRADED A+
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8
Which bone cell breaks down bone tissue?
Answer:
Osteoclast
Rationale:
Osteoclasts resorb bone, balancing bone formation by osteoblasts.
9
Which type of joint allows the greatest range of motion?
Answer:
Synovial joint
Rationale:
Synovial joints, such as the shoulder and knee, are freely movable due to a fluid-filled cavity.
10
Which chamber of the heart pumps oxygenated blood to the body?
Answer:
Left ventricle
Rationale:
The left ventricle pumps blood into the systemic circulation via the aorta.
11
Which valve prevents backflow from the left ventricle to the left atrium?
Answer:
Mitral (bicuspid) valve
Rationale:
The mitral valve ensures one-way flow into the aorta.
2026 2027 GRADED A+
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12
Which blood cells transport oxygen?
Answer:
Red blood cells (erythrocytes)
Rationale:
RBCs contain hemoglobin, which binds and carries oxygen to tissues.
13
What is the primary pacemaker of the heart?
Answer:
Sinoatrial (SA) node
Rationale:
The SA node initiates electrical impulses that set the heart rate.
14
Which structure conducts impulses from the atria to the ventricles?
Answer:
Atrioventricular (AV) node
Rationale:
The AV node delays the impulse, allowing ventricular filling before contraction.
15
Which part of the respiratory system is the site of gas exchange?
Answer:
Alveoli
Rationale:
Alveoli provide a large surface area for oxygen and carbon dioxide diffusion.
2026 2027 GRADED A+
WGU D312 A&P Practice Exam NEWEST 2026 ACTUAL EXAM TEST- COMPLETE REAL EXAM
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALREADY GRADED A+
(MOST RECENT!!)
1
Which organelle produces most of the cell’s ATP?
Answer:
Mitochondria
Rationale:
Mitochondria perform cellular respiration, converting glucose and oxygen into ATP, the energy
currency of the cell.
2
Which type of tissue lines body surfaces and forms glands?
Answer:
Epithelial tissue
Rationale:
Epithelial tissue covers organs and cavities and forms secretory glands.
3
Which connective tissue stores fat?
Answer:
Adipose tissue
Rationale:
Adipose cells store energy as fat and provide insulation and cushioning.
2026 2027 GRADED A+
,2|Page
4
Which muscle type is involuntary and found in hollow organs?
Answer:
Smooth muscle
Rationale:
Smooth muscle contracts without conscious control to move substances through organs like
intestines and blood vessels.
5
Which part of the neuron transmits impulses away from the cell body?
Answer:
Axon
Rationale:
The axon carries electrical signals to other neurons, muscles, or glands.
6
The functional unit of the kidney is:
Answer:
Nephron
Rationale:
Nephrons filter blood, reabsorb water and nutrients, and produce urine.
7
Which layer of the skin contains sweat glands and hair follicles?
Answer:
Dermis
Rationale:
The dermis contains vascular tissue, glands, and sensory structures.
2026 2027 GRADED A+
,3|Page
8
Which bone cell breaks down bone tissue?
Answer:
Osteoclast
Rationale:
Osteoclasts resorb bone, balancing bone formation by osteoblasts.
9
Which type of joint allows the greatest range of motion?
Answer:
Synovial joint
Rationale:
Synovial joints, such as the shoulder and knee, are freely movable due to a fluid-filled cavity.
10
Which chamber of the heart pumps oxygenated blood to the body?
Answer:
Left ventricle
Rationale:
The left ventricle pumps blood into the systemic circulation via the aorta.
11
Which valve prevents backflow from the left ventricle to the left atrium?
Answer:
Mitral (bicuspid) valve
Rationale:
The mitral valve ensures one-way flow into the aorta.
2026 2027 GRADED A+
, 4|Page
12
Which blood cells transport oxygen?
Answer:
Red blood cells (erythrocytes)
Rationale:
RBCs contain hemoglobin, which binds and carries oxygen to tissues.
13
What is the primary pacemaker of the heart?
Answer:
Sinoatrial (SA) node
Rationale:
The SA node initiates electrical impulses that set the heart rate.
14
Which structure conducts impulses from the atria to the ventricles?
Answer:
Atrioventricular (AV) node
Rationale:
The AV node delays the impulse, allowing ventricular filling before contraction.
15
Which part of the respiratory system is the site of gas exchange?
Answer:
Alveoli
Rationale:
Alveoli provide a large surface area for oxygen and carbon dioxide diffusion.
2026 2027 GRADED A+
