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WGU D313 2025 Objective Assessment for Anatomy and Physiology | Verified Questions and Answers (westernGU) $17.99
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WGU D313 2025 Objective Assessment for Anatomy and Physiology | Verified Questions and Answers (westernGU)

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WGU D313 2025 Objective Assessment for Anatomy and Physiology | Verified Questions and Answers (westernGU)

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  • June 18, 2024
  • December 19, 2024
  • 24
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers

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  • wgu d313 2025 objective assessment for anatomy and

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  • Human anatomy and physiology
  • Human anatomy and physiology

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WGU D313 Anatomy and Physiology Objective
Assessment 2025 | Up-to-Date Exam
Questions with Detailed Answers

1. Which of the following is the main function of the skeletal system?
A) Blood circulation
B) Movement
C) Protection of internal organs
D) Storage of hormones
Answer: C) Protection of internal organs
Rationale: The skeletal system provides structural support and
protection to vital organs like the brain, heart, and lungs. While it also
assists with movement and stores minerals, its primary function is to
protect internal organs.


2. The primary function of the mitochondria is to:
A) Synthesize proteins
B) Store genetic information
C) Produce energy (ATP)
D) Transport materials within the cell
Answer: C) Produce energy (ATP)
Rationale: Mitochondria are known as the powerhouse of the cell
because they generate ATP through cellular respiration, providing
energy for cellular activities.

,3. What is the name of the connective tissue that covers the bones
and serves as an attachment point for tendons and ligaments?
A) Cartilage
B) Peritoneum
C) Endosteum
D) Periosteum
Answer: D) Periosteum
Rationale: The periosteum is a dense layer of vascular connective tissue
that envelops bones, providing a site for attachment of muscles and
ligaments. It also plays a role in bone growth and repair.


4. Which type of muscle tissue is responsible for voluntary
movements?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Epithelial muscle
Answer: C) Skeletal muscle
Rationale: Skeletal muscle is responsible for voluntary movements and
is controlled by the somatic nervous system. Cardiac and smooth
muscles are involuntary.


5. The exchange of gases in the lungs occurs in the:
A) Trachea
B) Alveoli
C) Bronchi
D) Pleura

,Answer: B) Alveoli
Rationale: The alveoli are tiny air sacs in the lungs where gas exchange
occurs. Oxygen is absorbed into the blood, and carbon dioxide is
released from the blood into the air to be exhaled.


6. Which of the following is responsible for the production of red
blood cells?
A) Spleen
B) Liver
C) Bone marrow
D) Kidneys
Answer: C) Bone marrow
Rationale: Red blood cells are produced in the bone marrow through a
process called erythropoiesis. The spleen and liver play roles in breaking
down old red blood cells, while the kidneys produce erythropoietin to
stimulate red blood cell production.


7. Which part of the brain is primarily responsible for regulating heart
rate and blood pressure?
A) Cerebellum
B) Medulla oblongata
C) Hippocampus
D) Frontal lobe
Answer: B) Medulla oblongata
Rationale: The medulla oblongata, located in the brainstem, controls
autonomic functions such as heart rate, blood pressure, and respiration.

, 8. What is the role of the lymphatic system?
A) To regulate blood glucose levels
B) To transport oxygen to tissues
C) To defend the body against infection
D) To process food in the stomach
Answer: C) To defend the body against infection
Rationale: The lymphatic system is crucial for immunity. It filters lymph
and returns it to the bloodstream, and also contains lymph nodes that
trap pathogens.


9. Which of the following is the smallest unit of matter that retains the
chemical properties of an element?
A) Molecule
B) Atom
C) Electron
D) Neutron
Answer: B) Atom
Rationale: An atom is the basic unit of matter, made up of protons,
neutrons, and electrons. Molecules are made of atoms bonded
together, but atoms themselves retain the properties of the element.


10. Which of the following hormones is primarily responsible for
regulating blood sugar levels?
A) Insulin
B) Estrogen
C) Testosterone
D) Thyroid hormone

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