BIOD 151 Module 7 Exam Portage Learning Questions and Answers
2026 Practice Set
Module 7: Special Senses & Endocrine System
1. The "White of the Eye" that provides shape and protection is the:
• A. Choroid
• B. Retina
• C. Sclera ✅
• D. Cornea
Rationale: The sclera is the tough, fibrous outermost layer of the posterior eye.
2. Which structure is the "Window of the Eye" that bends light as it enters?
• A. Lens
• B. Iris
• C. Cornea ✅
• D. Pupil
Rationale: The cornea is transparent and responsible for the majority of light refraction.
3. The "Photoreceptors" responsible for color vision and high-acuity detail are:
• A. Rods
• B. Cones ✅
• C. Bipolar cells
• D. Ganglion cells
Rationale: Cones operate in bright light; Rods are for dim light and peripheral vision.
4. The "Blind Spot" of the eye, where no photoreceptors are present, is the:
• A. Fovea centralis
• B. Optic disc ✅
, • C. Macula lutea
• D. Posterior chamber
Rationale: This is the exit point for the optic nerve (CN II).
5. Which fluid fills the "Anterior Segment" of the eye and is drained by the Scleral
Venous Sinus?
• A. Vitreous humor
• B. Aqueous humor ✅
• C. Endolymph
• D. Perilymph
Rationale: Aqueous humor maintains intraocular pressure; Vitreous humor is the gel-like
fluid in the back.
6. The "Ossicles" of the middle ear, in order from the eardrum to the inner ear,
are:
• A. Stapes, Incus, Malleus
• B. Malleus, Incus, Stapes ✅
• C. Incus, Malleus, Stapes
• D. Malleus, Stapes, Incus
Rationale: Hammer (Malleus), Anvil (Incus), and Stirrup (Stapes).
7. The "Pharyngotympanic (Eustachian) Tube" connects the middle ear to the:
• A. Inner ear
• B. Throat (Nasopharynx) ✅
• C. Outer ear canal
• D. Larynx
Rationale: This tube equalizes pressure on both sides of the tympanic membrane.
8. Which structure in the Inner Ear is responsible for "Hearing"?
• A. Semicircular canals
• B. Vestibule
, • C. Cochlea ✅
• D. Ampulla
Rationale: The cochlea contains the Spiral Organ of Corti, the functional unit of hearing.
9. "Dynamic Equilibrium" (rotational acceleration) is sensed by receptors in the:
• A. Semicircular canals ✅
• B. Utricle
• C. Saccule
• D. Cochlear duct
Rationale: The crista ampullaris in the canals detects head rotation.
10. "Gustatory" cells are responsible for the sense of:
• A. Smell
• B. Taste ✅
• C. Sight
• D. Touch
Rationale: Gustation is the chemical sense of taste.
11. Which "Endocrine Gland" is often called the "Master Gland"?
• A. Thyroid
• B. Adrenal
• C. Pituitary (Hypophysis) ✅
• D. Pancreas
Rationale: The pituitary gland regulates many other endocrine glands via tropic
hormones.
12. "Antidiuretic Hormone (ADH)" is produced by the hypothalamus but released
by the:
• A. Anterior Pituitary
• B. Posterior Pituitary ✅
2026 Practice Set
Module 7: Special Senses & Endocrine System
1. The "White of the Eye" that provides shape and protection is the:
• A. Choroid
• B. Retina
• C. Sclera ✅
• D. Cornea
Rationale: The sclera is the tough, fibrous outermost layer of the posterior eye.
2. Which structure is the "Window of the Eye" that bends light as it enters?
• A. Lens
• B. Iris
• C. Cornea ✅
• D. Pupil
Rationale: The cornea is transparent and responsible for the majority of light refraction.
3. The "Photoreceptors" responsible for color vision and high-acuity detail are:
• A. Rods
• B. Cones ✅
• C. Bipolar cells
• D. Ganglion cells
Rationale: Cones operate in bright light; Rods are for dim light and peripheral vision.
4. The "Blind Spot" of the eye, where no photoreceptors are present, is the:
• A. Fovea centralis
• B. Optic disc ✅
, • C. Macula lutea
• D. Posterior chamber
Rationale: This is the exit point for the optic nerve (CN II).
5. Which fluid fills the "Anterior Segment" of the eye and is drained by the Scleral
Venous Sinus?
• A. Vitreous humor
• B. Aqueous humor ✅
• C. Endolymph
• D. Perilymph
Rationale: Aqueous humor maintains intraocular pressure; Vitreous humor is the gel-like
fluid in the back.
6. The "Ossicles" of the middle ear, in order from the eardrum to the inner ear,
are:
• A. Stapes, Incus, Malleus
• B. Malleus, Incus, Stapes ✅
• C. Incus, Malleus, Stapes
• D. Malleus, Stapes, Incus
Rationale: Hammer (Malleus), Anvil (Incus), and Stirrup (Stapes).
7. The "Pharyngotympanic (Eustachian) Tube" connects the middle ear to the:
• A. Inner ear
• B. Throat (Nasopharynx) ✅
• C. Outer ear canal
• D. Larynx
Rationale: This tube equalizes pressure on both sides of the tympanic membrane.
8. Which structure in the Inner Ear is responsible for "Hearing"?
• A. Semicircular canals
• B. Vestibule
, • C. Cochlea ✅
• D. Ampulla
Rationale: The cochlea contains the Spiral Organ of Corti, the functional unit of hearing.
9. "Dynamic Equilibrium" (rotational acceleration) is sensed by receptors in the:
• A. Semicircular canals ✅
• B. Utricle
• C. Saccule
• D. Cochlear duct
Rationale: The crista ampullaris in the canals detects head rotation.
10. "Gustatory" cells are responsible for the sense of:
• A. Smell
• B. Taste ✅
• C. Sight
• D. Touch
Rationale: Gustation is the chemical sense of taste.
11. Which "Endocrine Gland" is often called the "Master Gland"?
• A. Thyroid
• B. Adrenal
• C. Pituitary (Hypophysis) ✅
• D. Pancreas
Rationale: The pituitary gland regulates many other endocrine glands via tropic
hormones.
12. "Antidiuretic Hormone (ADH)" is produced by the hypothalamus but released
by the:
• A. Anterior Pituitary
• B. Posterior Pituitary ✅
