WGU D312 – Anatomy and Physiology I Objective
Assessment || VERIFIED STUDY GUIDE <2025/2026
Edition>
Description:
Objective assessment guide for WGU D312. Covers body systems, anatomical terminology,
homeostasis, cell biology, and physiological functions. Ideal for students in the nursing and
science tracks at WGU.
Keywords:
WGU D312
anatomy and physiology I
body systems
physiology exam prep
nursing science
verified D312 answers
WGU objective assessment
1. Which level of structural organization is considered the simplest?
A. Cellular level
B. Organ level
C. Tissue level
,D. Chemical level
Correct Answer: D. Chemical level
Explanation: The chemical level includes atoms and molecules, making it the most basic level of
organization.
2. The body system primarily responsible for transporting nutrients and gases is the:
A. Nervous system
B. Muscular system
C. Cardiovascular system
D. Endocrine system
Correct Answer: C. Cardiovascular system
Explanation: The cardiovascular system delivers oxygen and nutrients to tissues and removes
waste products.
3. Which type of feedback mechanism enhances the original stimulus?
A. Neutral feedback
B. Negative feedback
C. Positive feedback
D. Passive feedback
Correct Answer: C. Positive feedback
Explanation: Positive feedback amplifies the change, such as during childbirth or blood clotting.
,4. Which plane divides the body into left and right parts?
A. Transverse plane
B. Frontal plane
C. Sagittal plane
D. Coronal plane
Correct Answer: C. Sagittal plane
Explanation: The sagittal plane runs vertically, dividing the body into left and right sections.
5. Which cavity houses the brain?
A. Vertebral cavity
B. Cranial cavity
C. Thoracic cavity
D. Pelvic cavity
Correct Answer: B. Cranial cavity
Explanation: The cranial cavity contains the brain, enclosed by the skull.
6. What structure regulates the movement of substances into and out of the cell?
A. Nucleus
B. Cytoplasm
C. Cell membrane
D. Mitochondria
Correct Answer: C. Cell membrane
, Explanation: The cell membrane controls what enters and exits the cell, maintaining
homeostasis.
7. Which organelle is the site of protein synthesis?
A. Lysosome
B. Ribosome
C. Golgi apparatus
D. Mitochondrion
Correct Answer: B. Ribosome
Explanation: Ribosomes assemble proteins from amino acids based on genetic instructions.
8. What type of tissue lines body surfaces and cavities?
A. Connective tissue
B. Nervous tissue
C. Muscular tissue
D. Epithelial tissue
Correct Answer: D. Epithelial tissue
Explanation: Epithelial tissue forms linings of organs and structures and acts as a barrier.
9. Which of the following is NOT a function of epithelial tissue?
A. Protection
Assessment || VERIFIED STUDY GUIDE <2025/2026
Edition>
Description:
Objective assessment guide for WGU D312. Covers body systems, anatomical terminology,
homeostasis, cell biology, and physiological functions. Ideal for students in the nursing and
science tracks at WGU.
Keywords:
WGU D312
anatomy and physiology I
body systems
physiology exam prep
nursing science
verified D312 answers
WGU objective assessment
1. Which level of structural organization is considered the simplest?
A. Cellular level
B. Organ level
C. Tissue level
,D. Chemical level
Correct Answer: D. Chemical level
Explanation: The chemical level includes atoms and molecules, making it the most basic level of
organization.
2. The body system primarily responsible for transporting nutrients and gases is the:
A. Nervous system
B. Muscular system
C. Cardiovascular system
D. Endocrine system
Correct Answer: C. Cardiovascular system
Explanation: The cardiovascular system delivers oxygen and nutrients to tissues and removes
waste products.
3. Which type of feedback mechanism enhances the original stimulus?
A. Neutral feedback
B. Negative feedback
C. Positive feedback
D. Passive feedback
Correct Answer: C. Positive feedback
Explanation: Positive feedback amplifies the change, such as during childbirth or blood clotting.
,4. Which plane divides the body into left and right parts?
A. Transverse plane
B. Frontal plane
C. Sagittal plane
D. Coronal plane
Correct Answer: C. Sagittal plane
Explanation: The sagittal plane runs vertically, dividing the body into left and right sections.
5. Which cavity houses the brain?
A. Vertebral cavity
B. Cranial cavity
C. Thoracic cavity
D. Pelvic cavity
Correct Answer: B. Cranial cavity
Explanation: The cranial cavity contains the brain, enclosed by the skull.
6. What structure regulates the movement of substances into and out of the cell?
A. Nucleus
B. Cytoplasm
C. Cell membrane
D. Mitochondria
Correct Answer: C. Cell membrane
, Explanation: The cell membrane controls what enters and exits the cell, maintaining
homeostasis.
7. Which organelle is the site of protein synthesis?
A. Lysosome
B. Ribosome
C. Golgi apparatus
D. Mitochondrion
Correct Answer: B. Ribosome
Explanation: Ribosomes assemble proteins from amino acids based on genetic instructions.
8. What type of tissue lines body surfaces and cavities?
A. Connective tissue
B. Nervous tissue
C. Muscular tissue
D. Epithelial tissue
Correct Answer: D. Epithelial tissue
Explanation: Epithelial tissue forms linings of organs and structures and acts as a barrier.
9. Which of the following is NOT a function of epithelial tissue?
A. Protection
