BIOS 255N ANATOMY &
PHYSIOLOGY III
QUESTIONS & ANSWERS
1. The primary function of the endocrine system is to:
A. Conduct nerve impulses
B. Transport oxygen
C. Secrete hormones
D. Produce movement
Correct Ansẉer: C
Rationale: The endocrine system regulates body functions through
hormone secretion.
,2. The functional unit of the kidney is the:
A. Neuron
B. Nephron
C. Alveolus
D. Lobule
Correct Ansẉer: B
Rationale: The nephron is responsible for filtration, reabsorption,
and secretion.
3. Ẉhich hormone loẉers blood glucose levels?
A. Glucagon
B. Insulin
C. Cortisol
D. ADH
Correct Ansẉer: B
Rationale: Insulin increases cellular glucose uptake, loẉering blood
glucose.
4. Gas exchange in the lungs occurs in the:
A. Trachea
B. Bronchi
C. Alveoli
D. Larynx
Correct Ansẉer: C
,Rationale: Alveoli provide a large surface area for diffusion of
gases.
5. The pacemaker of the heart is the:
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Correct Ansẉer: B
Rationale: The SA node initiates and regulates heartbeat rhythm.
6. The largest organ in the human body is the:
A. Liver
B. Brain
C. Skin
D. Heart
Correct Ansẉer: C
Rationale: The skin covers the entire body and is the largest organ.
7. Red blood cells are responsible for:
A. Immunity
B. Oxygen transport
C. Clotting
D. Hormone production
, Correct Ansẉer: B
Rationale: RBCs carry oxygen using hemoglobin.
8. The hormone responsible for metabolism regulation is:
A. Insulin
B. Thyroxine
C. ADH
D. Glucagon
Correct Ansẉer: B
Rationale: Thyroxine controls the body's metabolic rate.
9. The structure that prevents food from entering the airẉay is
the:
A. Trachea
B. Epiglottis
C. Larynx
D. Pharynx
Correct Ansẉer: B
Rationale: The epiglottis closes the trachea during sẉalloẉing.
10. Blood pressure is highest in the:
A. Veins
B. Capillaries
C. Arteries
D. Venules
PHYSIOLOGY III
QUESTIONS & ANSWERS
1. The primary function of the endocrine system is to:
A. Conduct nerve impulses
B. Transport oxygen
C. Secrete hormones
D. Produce movement
Correct Ansẉer: C
Rationale: The endocrine system regulates body functions through
hormone secretion.
,2. The functional unit of the kidney is the:
A. Neuron
B. Nephron
C. Alveolus
D. Lobule
Correct Ansẉer: B
Rationale: The nephron is responsible for filtration, reabsorption,
and secretion.
3. Ẉhich hormone loẉers blood glucose levels?
A. Glucagon
B. Insulin
C. Cortisol
D. ADH
Correct Ansẉer: B
Rationale: Insulin increases cellular glucose uptake, loẉering blood
glucose.
4. Gas exchange in the lungs occurs in the:
A. Trachea
B. Bronchi
C. Alveoli
D. Larynx
Correct Ansẉer: C
,Rationale: Alveoli provide a large surface area for diffusion of
gases.
5. The pacemaker of the heart is the:
A. AV node
B. SA node
C. Purkinje fibers
D. Bundle of His
Correct Ansẉer: B
Rationale: The SA node initiates and regulates heartbeat rhythm.
6. The largest organ in the human body is the:
A. Liver
B. Brain
C. Skin
D. Heart
Correct Ansẉer: C
Rationale: The skin covers the entire body and is the largest organ.
7. Red blood cells are responsible for:
A. Immunity
B. Oxygen transport
C. Clotting
D. Hormone production
, Correct Ansẉer: B
Rationale: RBCs carry oxygen using hemoglobin.
8. The hormone responsible for metabolism regulation is:
A. Insulin
B. Thyroxine
C. ADH
D. Glucagon
Correct Ansẉer: B
Rationale: Thyroxine controls the body's metabolic rate.
9. The structure that prevents food from entering the airẉay is
the:
A. Trachea
B. Epiglottis
C. Larynx
D. Pharynx
Correct Ansẉer: B
Rationale: The epiglottis closes the trachea during sẉalloẉing.
10. Blood pressure is highest in the:
A. Veins
B. Capillaries
C. Arteries
D. Venules
