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BIO 2331 Lab Practical 4 Study Guide
Questions with Verified Solutions 100%
Correct Questions and Correct Answers
Gustation Ans: — Sense of taste detected by taste buds
Taste buds Ans: — Chemoreceptors embedded in papillae walls
that detect tastes
Four primary tastes Ans: — Sweet, sour, salty, bitter
Gustatory cells Ans: — Actual taste receptors stimulated by
molecules dissolved in saliva
Tongue papillae Ans: — Circumvallate, filiform, and fungiform
types with different functions
Circumvallate papillae Ans: — Large and blunt papillae along the
posterior edge of the tongue
Filiform papillae Ans: — Smaller, tufted papillae over the entire
surface of the tongue, have touch but no taste receptors
Fungiform papillae Ans: — Small, mushroom-shaped papillae over
the entire surface of the tongue, most contain taste buds
PTC taste Ans: — Ability to taste PTC is genetic
Olfaction Ans: — Sense of smell detected by olfactory receptors in
the nasal cavity
Olfactory epithelium Ans: — Houses olfactory receptor neurons
Olfactory cilia Ans: — Projections of olfactory receptor cells that
bind dissolved odor molecules
Olfactory nerve Ans: — Bundles of axons from receptor cells that
synapse with olfactory tracts in olfactory bulb
Olfactory bulb Ans: — Area in the CNS where sensory receptors
synapse with olfactory tract neurons
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Olfactory tract Ans: — Carries sensory information to the brain
Eye Ans: — Hollow, fluid-filled sphere responsible for vision
Outer tunic Ans: — Provides support, protection, and assists with
vision
Sclera Ans: — White of the eye
Cornea Ans: — Clear layer over pupil and iris
Middle tunic Ans: — Contains intrinsic eye muscles and blood
vessels
Choroid Ans: — Capillary network within the middle tunic
Iris Ans: — Colored part around the pupil
Ciliary body Ans: — Muscle that focuses the lens
Inner tunic Ans: — Contains the retina and photoreceptors
Retina Ans: — Inside back of the eye, contains rods and cones
Photoreceptors Ans: — Sensory receptors in the retina that detect
light
Fovea centralis Ans: — Part of the retina with the sharpest vision,
contains cones
Lacrimal apparatus Ans: — Produces tears and drains them into
the nasal cavity
Extrinsic eye muscles Ans: — Muscles that control eye movement
Superior oblique Ans: — Eye muscle responsible for moving the
eye downward and outward
Superior rectus Ans: — Eye muscle responsible for moving the eye
upward
Lateral rectus Ans: — Eye muscle responsible for moving the eye
outward
Medial rectus Ans: — Eye muscle responsible for moving the eye
inward
© 2025 All rights reserved
BIO 2331 Lab Practical 4 Study Guide
Questions with Verified Solutions 100%
Correct Questions and Correct Answers
Gustation Ans: — Sense of taste detected by taste buds
Taste buds Ans: — Chemoreceptors embedded in papillae walls
that detect tastes
Four primary tastes Ans: — Sweet, sour, salty, bitter
Gustatory cells Ans: — Actual taste receptors stimulated by
molecules dissolved in saliva
Tongue papillae Ans: — Circumvallate, filiform, and fungiform
types with different functions
Circumvallate papillae Ans: — Large and blunt papillae along the
posterior edge of the tongue
Filiform papillae Ans: — Smaller, tufted papillae over the entire
surface of the tongue, have touch but no taste receptors
Fungiform papillae Ans: — Small, mushroom-shaped papillae over
the entire surface of the tongue, most contain taste buds
PTC taste Ans: — Ability to taste PTC is genetic
Olfaction Ans: — Sense of smell detected by olfactory receptors in
the nasal cavity
Olfactory epithelium Ans: — Houses olfactory receptor neurons
Olfactory cilia Ans: — Projections of olfactory receptor cells that
bind dissolved odor molecules
Olfactory nerve Ans: — Bundles of axons from receptor cells that
synapse with olfactory tracts in olfactory bulb
Olfactory bulb Ans: — Area in the CNS where sensory receptors
synapse with olfactory tract neurons
© 2025 All rights reserved
, 2 | Page
Olfactory tract Ans: — Carries sensory information to the brain
Eye Ans: — Hollow, fluid-filled sphere responsible for vision
Outer tunic Ans: — Provides support, protection, and assists with
vision
Sclera Ans: — White of the eye
Cornea Ans: — Clear layer over pupil and iris
Middle tunic Ans: — Contains intrinsic eye muscles and blood
vessels
Choroid Ans: — Capillary network within the middle tunic
Iris Ans: — Colored part around the pupil
Ciliary body Ans: — Muscle that focuses the lens
Inner tunic Ans: — Contains the retina and photoreceptors
Retina Ans: — Inside back of the eye, contains rods and cones
Photoreceptors Ans: — Sensory receptors in the retina that detect
light
Fovea centralis Ans: — Part of the retina with the sharpest vision,
contains cones
Lacrimal apparatus Ans: — Produces tears and drains them into
the nasal cavity
Extrinsic eye muscles Ans: — Muscles that control eye movement
Superior oblique Ans: — Eye muscle responsible for moving the
eye downward and outward
Superior rectus Ans: — Eye muscle responsible for moving the eye
upward
Lateral rectus Ans: — Eye muscle responsible for moving the eye
outward
Medial rectus Ans: — Eye muscle responsible for moving the eye
inward
© 2025 All rights reserved
