Recap Chemical senses

Question 1

True or false:

Cilia of olfactory epithelial cells contain chemoreceptors to detect odors

Answer 1

True

Question 2

True or false:

Damaged olfactory epithelial cells are not replaced

Answer 2

False

Question 3

True or false:

Binding of odorants activates intracellular cascade through G-coupled proteins, cGMP generation and activation of cGMP cation channels

Answer 3

False

Question 4

True or false:

3 different receptor types can encode many odors

Answer 4

False

Question 5

True or false:

individual olfactory sensory neurons can respond only to 1 specific odorant and not to others

Answer 5

False

Question 6

True or false:

Many olfactory epithelium cells responding to the same odor synapse onto the same glomerulus.

Answer 6

True

Question 7

True or false:

Glomeruli are located in the olfactory bulb

Answer 7

True

Question 8

True or false:

Pyriform cortex is the primary sensory cortex for olfactory information

Answer 8

True

Question 9

True or false:

Olfactory information is transmitted by parallel pathways to amygdala, hypothalamus, hippocampus, frontal cortex

Answer 9

True

Question 10

True or false:

Granule cells are part of olfactory epithelium

Answer 10

False

Question 11

True or false:

Inhibitory curtain of granule cells increases signal to noise ratio

Answer 11

True

Question 12

True or false:

Chemoreceptors are located in taste buds in 3 types of pupillae: circumvallate, fungiform, foliate

Answer 12

True

Question 13

True or false:

Acid taste is transmitted through PLC and IP3, molecules of acid bind to the receptor and initiate an intracellular cascade

Answer 13

False

Question 14

True or false:

Umami, bitter and sweet tastes are sensed because the molecules directly open ion receptors and allow positive ions to enter the receptor cell

Answer 14

False

Question 15

True or false:

Heat and capsaicin activate the same receptor

Answer 15

True

Question 16

True or false:

Facial nerve (VII), glossopharyngeal (IX) and laryngeal nerves (X) send taste information to the nucleus of the solitary tract (medulla) and cortex

Answer 16

True

Question 17

True or false:

trigeminal nerve sends information on temperature and texture of food

Answer 17

True

Question 18

True or false:

•Taste information is integrated with visceral information in the nucleus of solitary tract

Answer 18

True

Question 19

True or false:

Sensory taste information reaches pyriform cortex

Answer 19

False

Question 20

True or false:

Gustatory cortex contains gustatory maps of different tastes: different tastes activate specific spots in the cortex

Answer 20

True