BIOS 252
Anatomy & Physiology II
Final Exams Review (Qns & Ans)
2025
1. Which part of the nephron is primarily responsible for the
reabsorption of water?
A) Glomerulus
B) Proximal convoluted tubule
C) Loop of Henle
D) Distal convoluted tubule
ANS: C) Loop of Henle
Rationale: The descending limb of the Loop of Henle is
permeable to water, allowing for its reabsorption, which is crucial
for concentrating urine.
©2025
,2. Which structure in the human brain acts as the integration
center for autonomic functions?
A) Hippocampus
B) Cerebellum
C) Thalamus
D) Hypothalamus
ANS: D) Hypothalamus
Rationale: The hypothalamus is responsible for controlling
autonomic functions such as temperature regulation, hunger, and
thirst.
3. Which hormone is primarily responsible for uterine
contractions during childbirth?
A) Oxytocin
B) Estrogen
C) Progesterone
D) Prolactin
ANS: A) Oxytocin
Rationale: Oxytocin stimulates uterine muscle contractions
during labor and milk ejection during breastfeeding.
©2025
, 4. What is the major ion involved in the generation of action
potentials in muscle fibers?
A) Sodium (Na+)
B) Potassium (K+)
C) Calcium (Ca2+)
D) Chloride (Cl-)
ANS: A) Sodium (Na+)
Rationale: Sodium ions are crucial for the depolarization
phase of action potentials in muscle and nerve cells.
5. Which of the following structures is involved in sound wave
transduction in the ear?
A) Cochlea
B) Eustachian tube
C) Semicircular canals
D) Tympanic membrane
ANS: A) Cochlea
Rationale: The cochlea contains hair cells that transduce
mechanical sound vibrations into electrical signals.
Fill-in-the-Blank Questions:
©2025
Anatomy & Physiology II
Final Exams Review (Qns & Ans)
2025
1. Which part of the nephron is primarily responsible for the
reabsorption of water?
A) Glomerulus
B) Proximal convoluted tubule
C) Loop of Henle
D) Distal convoluted tubule
ANS: C) Loop of Henle
Rationale: The descending limb of the Loop of Henle is
permeable to water, allowing for its reabsorption, which is crucial
for concentrating urine.
©2025
,2. Which structure in the human brain acts as the integration
center for autonomic functions?
A) Hippocampus
B) Cerebellum
C) Thalamus
D) Hypothalamus
ANS: D) Hypothalamus
Rationale: The hypothalamus is responsible for controlling
autonomic functions such as temperature regulation, hunger, and
thirst.
3. Which hormone is primarily responsible for uterine
contractions during childbirth?
A) Oxytocin
B) Estrogen
C) Progesterone
D) Prolactin
ANS: A) Oxytocin
Rationale: Oxytocin stimulates uterine muscle contractions
during labor and milk ejection during breastfeeding.
©2025
, 4. What is the major ion involved in the generation of action
potentials in muscle fibers?
A) Sodium (Na+)
B) Potassium (K+)
C) Calcium (Ca2+)
D) Chloride (Cl-)
ANS: A) Sodium (Na+)
Rationale: Sodium ions are crucial for the depolarization
phase of action potentials in muscle and nerve cells.
5. Which of the following structures is involved in sound wave
transduction in the ear?
A) Cochlea
B) Eustachian tube
C) Semicircular canals
D) Tympanic membrane
ANS: A) Cochlea
Rationale: The cochlea contains hair cells that transduce
mechanical sound vibrations into electrical signals.
Fill-in-the-Blank Questions:
©2025
