Fill in the blanks: In an olfactory neuron, the binding of a(n) ______to its membrane receptor triggers a(n)_______potential in the axons of the______nerve.

Which of the following cranial nerves is not involved in the gustatory sense?

a. Vagus nerve (X)

b. Hypoglossal nerve (XII)

c. Facial nerve (VII)

d. Glossopharyngeal nerve (IX)

Tears normally flow from the lacrimal sac into the:

a. lacrimal gland.

b. lacrimal canaliculi.

c. lacrimal puncta.

d. nasolacrimal duct.

1. Match the cell type with the correct stimulus.     

____Rod or cone     

____Hair cell in cochlea     

____Gustatory cell     

____Olfactory neuron     

____Hair cell in vestibule

a. Head movement

b. Odorant

c. Photon

d. Taste substance

e. Sound wave

The axons of the olfactory nerve terminate in the:

a. olfactory epithelium.

b. olfactory bulb.

c. olfactory tract.

d. primary olfactory cortex.

The primary olfactory cortex is located in the:

a. frontal lobe.

b. occipital lobe.

c. parietal lobe.

d. temporal lobe.

Which of the following statements is true regarding gustatory cells?

a. They have microvilli that project into the taste pore.

b. There are only 10–20 gustatory cells in a typical taste bud.

c. They have a lifespan of approximately 6 months.

d. Some form synapses with neurons that give rise to the trigeminal nerve.

Match the taste with the chemical substance that produces it.      

____Sweet      

____Sour     

____Salty      

____Bitter      

____Umami

a. Many alkaloids

b. Sucrose

c. Glutamate

d. Sodium ions

e. Hydrogen ions

he axons from the nasal retina in the left eye terminate in the:

a. right lateral geniculate nucleus.

b. left lateral geniculate nucleus.

c. right medial occipital lobe.

d. left medial occipital lobe.