WGUD313AnatomyandPhysiologyObjective Assessment Question Bank (2025/2026) Introduction This question bank is designed to prepare students for the Western Governors University (WGU) D313 Anatomy and Physiology II Objective Assessment for the 2025/2026 academic year. It includes 50 multiple-choice questions aligned with WGU’s curriculum, covering key topics such as levels of biological organization, homeostasis, cell structure, tissue types, and major body systems. Each ques- tion follows an NCLEX-style format with four answer options, a clearly marked correct answer, and a detailed rationale explaining both correct and incorrect options.Question Bank Question 1:Which level of biological organization includes all the chemical reactions occurring in an organism?A.Tissue B.Organ C.Metabolism D.Organism
Correct Answer: C. Metabolism
Rationale:Metabolism encompasses all chemical reactions in an organ-
ism, including those involved in energy production and molecule synthesis.Tissue (A) refers to a group of similar cells, organ (B) is a structure with spe- cific functions, and organism (D) is the entire living entity, none of which specifically denote chemical reactions. [](https://www.reddit.com/r/WGUNursingHacks/comments/1hkwko6/wgud313anatomyphysiology2oacertifiedtips/) Question 2:A patient’s body temperature rises during a fever. Which component of a feed- back loop is responsible for detecting this change?A.Effector B.Control center C.Receptor
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D.Response
Correct Answer: C. Receptor
Rationale:In a feedback loop, the receptor (sensor) detects changes in the envi- ronment, such as a rise in body temperature. The control center (B) processes the information, the effector (A) produces the response, and the response (D) is the outcome, like sweating. [](https://www.reddit.com/r/WGUNursingHacks/comments/1hkwko6/wgu d313anatomyphysiology2oacertifiedtips/) Question 3:Which organelle is primarily responsible for ATP production in eukaryotic cells?A.Nucleus B.Mitochondrion C.Golgi apparatus D.Endoplasmic reticulum
Correct Answer: B. Mitochondrion
Rationale:Mitochondria are the powerhouses of the cell, producing ATP via cel-
lular respiration. The nucleus (A) controls gene expression, the Golgi apparatus (C) modifies proteins, and the endoplasmic reticulum (D) synthesizes proteins and lipids.Question 4:A cell is placed in a hypertonic solution. What will happen to the cell?A.It will swell and burst B.It will shrink C.It will remain unchanged D.It will divide
Correct Answer: B. It will shrink
Rationale:In a hypertonic solution, water moves out of the cell due to higher
solute concentration outside, causing the cell to shrink. Swelling (A) occurs in hypotonic solutions, unchanged (C) in isotonic solutions, and division (D) is un- related to tonicity.Question 5:Which tissue type is characterized by tightly packed cells with minimal extracel- lular matrix and is found lining the intestines?A.Connective B.Epithelial C.Muscle D.Nervous
Correct Answer: B. Epithelial
Rationale:Epithelial tissue consists of tightly packed cells with minimal extra- cellular matrix, ideal for lining surfaces like the intestines. Connective tissue (A) has more matrix, muscle (C) is for contraction, and nervous (D) is for signal transmission.
Question 6:What is the primary function of osteoblasts in bone physiology?
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