Anatomy & Physiology Questions 1–40 PDF – Practice Questions with Answers & Detailed Rationales | Instant Download

Anatomy & Physiology (Questions 1-40)
1. What is the medical term for the transparent anterior portion of the eye
that covers the iris and pupil?
 A) Sclera
 B) Cornea
 C) Retina
 D) Choroid
Answer: B) Cornea
Rationale: The cornea is the clear, dome-shaped surface that covers the
front of the eye. The sclera is the "white" of the eye. The retina is the inner
layer. The choroid is the vascular layer.
2. Which structure is responsible for focusing light onto the retina?
 A) Iris
 B) Pupil
 C) Lens
 D) Optic nerve
Answer: C) Lens
Rationale: The lens changes shape (accommodation) to focus light precisely
on the retina. The iris controls light entry, and the pupil is the opening.
3. What is the primary function of the rods in the retina?
 A) Color vision
 B) Night vision and peripheral vision
 C) Central vision
 D) Tear production
Answer: B) Night vision and peripheral vision
Rationale: Rods are more sensitive to low light and are responsible for
scotopic (night) vision and peripheral vision, but they do not perceive color.

,4. The medical term for "earwax" is:
 A) Tympanic fluid
 B) Cerumen
 C) Endolymph
 D) Perilymph
Answer: B) Cerumen
Rationale: Cerumen is the waxy secretion in the ear canal. Tympanic fluid is
not a standard term; endolymph and perilymph are inner ear fluids.
5. What are the three tiny bones in the middle ear called?
 A) Hammer, Anvil, Stirrup (Malleus, Incus, Stapes)
 B) Cochlea, Vestibule, Semicircular canals
 C) Pinna, Tragus, Lobe
 D) Scala tympani, Scala media, Scala vestibuli
Answer: A) Hammer, Anvil, Stirrup (Malleus, Incus, Stapes)
Rationale: These are the auditory ossicles. The cochlea and semicircular
canals are in the inner ear.
6. Which cranial nerve is responsible for the sense of smell?
 A) Cranial Nerve I (Olfactory)
 B) Cranial Nerve II (Optic)
 C) Cranial Nerve VIII (Vestibulocochlear)
 D) Cranial Nerve VII (Facial)
Answer: A) Cranial Nerve I (Olfactory)
Rationale: The olfactory nerve (CN I) is a sensory nerve for smell. CN II is
vision, CN VIII is hearing/balance, and CN VII is facial movement/taste.
7. The "white" of the eye is known as the:
 A) Conjunctiva
 B) Sclera

,  C) Retina
 D) Uvea
Answer: B) Sclera
Rationale: The sclera is the tough, fibrous outer layer. The conjunctiva is the
mucous membrane covering the sclera.
8. What fluid fills the anterior chamber of the eye?
 A) Vitreous humor
 B) Aqueous humor
 C) Synovial fluid
 D) Cerebrospinal fluid
Answer: B) Aqueous humor
Rationale: Aqueous humor fills the anterior and posterior chambers.
Vitreous humor fills the large vitreous chamber behind the lens.
9. The snail-shaped structure in the inner ear responsible for hearing is the:
 A) Semicircular canals
 B) Cochlea
 C) Vestibule
 D) Tympanic membrane
Answer: B) Cochlea
Rationale: The cochlea is responsible for hearing. The semicircular canals
are for balance, and the vestibule connects them.
10. What is the medical term for the eardrum?
 A) Tympanic membrane
 B) Oval window
 C) Round window
 D) Pinna
Answer: A) Tympanic membrane

, Rationale: The tympanic membrane separates the external ear from the middle
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ear and transmits sound vibrations.
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11. Which photoreceptor cells are responsible for color vision and central
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vision?
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 A) Rods
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 B) Cones
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 C) Bipolar cells
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 D) Ganglion cells
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Answer: B) Cones k k




Rationale: Cones function in bright light and are responsible for high-acuity
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and color vision. There are three types: red, green, and blue.
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12. What is the name of the opening in the center of the iris?
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 A) Pupil
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 B) Fovea
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 C) Macula
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 D) Optic disc
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Answer: A) Pupil k k




Rationale: The pupil is the black circular opening in the center of the iris.
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13. Which part of the ear is responsible for maintaining static equilibrium
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(head position)?
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 A) Semicircular canals
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 B) Utricle and Saccule
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 C) Cochlea
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 D) Tympanic membrane
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Answer: B) Utricle and Saccule k k k k




Rationale: The utricle and saccule are in the vestibule and detect linear
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acceleration and head tilt (static equilibrium). The semicircular canals
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detect rotational movement (dynamic equilibrium).
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