Human Physiology Certification
Examination Questions and Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. Human physiology is the study of:
A. Human anatomy only
B. Diseases only
C. Normal functions of the human body
D. Human evolution
Answer: C. Normal functions of the human body
Rationale: Physiology focuses on how body systems function and maintain life.
2. The basic functional unit of the human body is the:
A. Tissue
B. Organ
C. Cell
D. Organ system
Answer: C. Cell
Rationale: Cells are the smallest living units capable of performing essential
functions.
,3. The cell membrane is primarily composed of:
A. Proteins only
B. Carbohydrates only
C. Phospholipids and proteins
D. DNA and RNA
Answer: C. Phospholipids and proteins
Rationale: The phospholipid bilayer with proteins forms the selectively permeable
cell membrane.
4. The main function of the nucleus is:
A. ATP production
B. Protein digestion
C. Storage of genetic information
D. Lipid breakdown
Answer: C. Storage of genetic information
Rationale: The nucleus contains DNA that controls cellular activities.
5. The organelle responsible for ATP production is the:
A. Ribosome
B. Lysosome
C. Mitochondrion
D. Golgi apparatus
Answer: C. Mitochondrion
Rationale: Mitochondria generate ATP through cellular respiration.
6. Ribosomes are responsible for:
A. DNA storage
B. Protein synthesis
,C. Lipid storage
D. Cell movement
Answer: B. Protein synthesis
Rationale: Ribosomes assemble amino acids into proteins.
7. The movement of molecules from high to low concentration is:
A. Active transport
B. Endocytosis
C. Diffusion
D. Exocytosis
Answer: C. Diffusion
Rationale: Diffusion occurs along a concentration gradient without energy input.
8. Osmosis refers specifically to movement of:
A. Proteins
B. Ions
C. Water
D. Glucose
Answer: C. Water
Rationale: Osmosis is the movement of water across a selectively permeable
membrane.
9. Active transport requires:
A. Oxygen only
B. No energy
C. ATP energy
D. Carbon dioxide
Answer: C. ATP energy
, Rationale: Active transport moves substances against concentration gradients
using energy.
10. Homeostasis refers to:
A. Body growth
B. Disease development
C. Maintenance of stable internal conditions
D. Cell death
Answer: C. Maintenance of stable internal conditions
Rationale: Homeostasis keeps internal environments within normal ranges.
11. The primary control center for homeostasis is the:
A. Cerebellum
B. Heart
C. Hypothalamus
D. Liver
Answer: C. Hypothalamus
Rationale: The hypothalamus regulates temperature, hormones, and many
homeostatic functions.
12. The nervous system uses ______ as rapid communication signals.
A. Hormones
B. Antibodies
C. Electrical impulses
D. Enzymes
Answer: C. Electrical impulses
Rationale: Neurons communicate rapidly through electrical signals.
Examination Questions and Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Human physiology is the study of:
A. Human anatomy only
B. Diseases only
C. Normal functions of the human body
D. Human evolution
Answer: C. Normal functions of the human body
Rationale: Physiology focuses on how body systems function and maintain life.
2. The basic functional unit of the human body is the:
A. Tissue
B. Organ
C. Cell
D. Organ system
Answer: C. Cell
Rationale: Cells are the smallest living units capable of performing essential
functions.
,3. The cell membrane is primarily composed of:
A. Proteins only
B. Carbohydrates only
C. Phospholipids and proteins
D. DNA and RNA
Answer: C. Phospholipids and proteins
Rationale: The phospholipid bilayer with proteins forms the selectively permeable
cell membrane.
4. The main function of the nucleus is:
A. ATP production
B. Protein digestion
C. Storage of genetic information
D. Lipid breakdown
Answer: C. Storage of genetic information
Rationale: The nucleus contains DNA that controls cellular activities.
5. The organelle responsible for ATP production is the:
A. Ribosome
B. Lysosome
C. Mitochondrion
D. Golgi apparatus
Answer: C. Mitochondrion
Rationale: Mitochondria generate ATP through cellular respiration.
6. Ribosomes are responsible for:
A. DNA storage
B. Protein synthesis
,C. Lipid storage
D. Cell movement
Answer: B. Protein synthesis
Rationale: Ribosomes assemble amino acids into proteins.
7. The movement of molecules from high to low concentration is:
A. Active transport
B. Endocytosis
C. Diffusion
D. Exocytosis
Answer: C. Diffusion
Rationale: Diffusion occurs along a concentration gradient without energy input.
8. Osmosis refers specifically to movement of:
A. Proteins
B. Ions
C. Water
D. Glucose
Answer: C. Water
Rationale: Osmosis is the movement of water across a selectively permeable
membrane.
9. Active transport requires:
A. Oxygen only
B. No energy
C. ATP energy
D. Carbon dioxide
Answer: C. ATP energy
, Rationale: Active transport moves substances against concentration gradients
using energy.
10. Homeostasis refers to:
A. Body growth
B. Disease development
C. Maintenance of stable internal conditions
D. Cell death
Answer: C. Maintenance of stable internal conditions
Rationale: Homeostasis keeps internal environments within normal ranges.
11. The primary control center for homeostasis is the:
A. Cerebellum
B. Heart
C. Hypothalamus
D. Liver
Answer: C. Hypothalamus
Rationale: The hypothalamus regulates temperature, hormones, and many
homeostatic functions.
12. The nervous system uses ______ as rapid communication signals.
A. Hormones
B. Antibodies
C. Electrical impulses
D. Enzymes
Answer: C. Electrical impulses
Rationale: Neurons communicate rapidly through electrical signals.
