AP test 1

What molecule is activated from the binding of an odorant to transmembranous receptor molecules on olfactory hairs?

D. G protein

The blink reflex is designed to

keep the eyes moist.

Arrange the following in correct sequence: (1) gustatory cell depolarizes (2) action potential stimulated in gustatory neurons (3) food substance dissolves in saliva (4) neurotransmitter released by gustatory cell (5) food substance enters taste pore and attaches to receptor on gustatory hair

3, 5, 1, 4, 2

Arrange the following to reflect the correct sequence an action potential would follow to reach the olfactory cortex of the brain (1) olfactory bulb (2) olfactory cortex (3) olfactory epithelium (4) olfactory tract

3,1,4,2

Why does inhaling deeply and slowly through the nose help to identify an odor?

A. More air containing the odor is brought into contact with the olfactory epithelium.

Which of the following is NOT a cell type found in taste buds?

A. mitral cells

The medial olfactory area...

A. provides emotional reactions to odors.

Taste buds..

Can only perceive tase if the molecules are in solution

13. Which of the following is NOT a primary odor class?

A. umami

Which of the following statements is false?

B. Sensitivity of taste buds for sweet taste is very high.

In order for a molecule to be detected by the olfactory neurons, it must

C. be dissolved in fluid covering the olfactory epithelium.

Some thyroid disorders are characterized by an increase in the width of the palpebral fissure. This would be an increase in the distance between the

C. eyelids.

You are an airborne molecule that dissolves in the fluid covering the olfactory epithelium. Which of the following must you do in order to depolarize neurons in the olfactory epithelium?

D. bind to receptor molecules on the olfactory hair membrane

Which of the following structures is considered to be an accessory structure of the eye?

D. palpebrae

To which of the following substances would the taste buds be most sensitive?

D. quinine (tonic) water

The olfactory cortex is located in the _____ lobe and the secondary olfactory areas are located in the ___ lobe.

D. temporal, frontal

The ability of the olfactory system to adapt to a particular odor may involve

D. the intermediate olfactory area sending inhibiting impulses to the olfactory bulb.

Which of the following statements is true?

Damaged olfactory neurons are replaced.

12. What ion(s) cause(s) depolarization in olfactory neurons?

E. Both Na+ and Ca2+

The most sensitive taste buds are found in _____ papillae.

E. foliate

Following a stroke, Harriet has impaired sense of taste on one side of the tip of her tongue, indicating the part of her brain that was affected must communicate with the

Facial Nerve

Taste buds are not associated with _____ papillae.

Filiform

The receptor cells for which of the following special senses are bipolar neurons?

Smell

Which of the following special senses is relayed directly to the cerebral cortex without going to the thalamus?

Smell

Which of the special senses contains receptor neurons that are the only nerve cells in direct contact with the outside environment?

Smell

15. Sensory structures that detect taste are

Taste Buds

Which type of taste has the lowest threshold?

bitter

Which tastant is NOT correctly matched with its process of depolarization?

bitter - K+

Palpebrae is another name for the

eyelids

You taste a sauce with the "tip of your tongue". These taste sensations would be carried via the _____ cranial nerve.

facial (VII)

The sense of taste is called

gustation

The taste cortex is located in the ________ lobe.

parietal

The newest taste to be described is

umami