Eyelids serve two purposes: one is to protect the eye and the other is to
A. help distribute blood to the eye surface.
B. help distribute lacrimal fluid to cleanse and lubricate the surface.
C. help spread antiviral solution.
D. help to control the transmission of the nerve impulse to the retina.
E. prevent excess mucus from obscuring vision.
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Question 2) The primary function of eyebrows is to
A. allow the appropriate amount of light to enter the eye.
B. prevent excess light from entering the eye.
C. prevent objects from striking the eye.
D. prevent sweat from dripping into the open eye.
E. form a protective barrier of fat and hair to help shade the eye.
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Question 3) The conjunctiva is composed of _____ epithelium.
A. simple squamous
B. simple cuboidal
C. stratified squamous
D. simple columnar
E. stratified keratinized
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Question 4) Certain odors can initiate behavioral and emotional reactions because
A. the olfactory pathway is connected directly to the medulla oblongata.
B. there are widespread olfactory associations within the hypothalamus and limbic system.
C. olfactory sensations are interpreted at the prefrontal cortex.
D. the olfactory pathway is connected directly to the occipital lobe.
E. the sense of olfaction occurs immediately at the olfactory epithelium.
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Question 5) The olfactory tracts project
A. directly to the primary olfactory cortex of the temporal lobe of the cerebrum.
B. directly to the primary olfactory cortex of the frontal lobe of the cerebrum.
C. to the thalamus and then to the primary olfactory cortex of the temporal lobe of the cerebrum.
D. to the thalamus and then to the primary olfactory cortex of the frontal lobe of the cerebrum.
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Question 6) Where would you find olfactory hairs?
A. Scattered among the lamina propria
B. At the apical surface of olfactory neurons
C. Buried within the olfactory glands
D. At the surface of supporting cells
E. Concentrated along basal cells
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Question 7) What molecules help concentrate odorants at the olfactory receptor cells?
A. Sustentacularin
B. Odorant-binding proteins
C. Volatile molecules
D. G-proteins
E. Tastants
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Question 8) Some odors cause visceral reactions, such as a gagging response to the smell of rotten food. Such responses are a result of olfactory pathways through the
A. cerebellum.
B. amygdala.
C. thalamus.
D. hypothalamus.
E. cerebrum.
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Question 9) Olfactory glomeruli are located in the
A. thalamus.
B. olfactory epithelium.
C. olfactory bulbs.
D. hypothalamus.
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Question 10) The route that the sensation of taste follows is
a: Primary axons pass along cranial nerves VII and IX.
b: Primary neurons synapse in the nucleus solitarius.
c: Secondary neurons synapse in the thalamus.
d: Tertiary neurons travel to the primary gustatory cortex.
A. a, b, c, d
B. b, c, a, d
C. a, d, b, c
D. d, c, b, a
E. c, d, a, b
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