lecture 9 - the chemical senses

Question 1

what is gustation?

Answer 1

the structure and function of taste

Question 2

what are the 5 basic taste quals

Answer 2

sweet, salty, sour, umami or bitter

Question 3

what are the types of papilla?

Answer 3

Filiform, Fungiform, Foliate and Circumvallate

Question 4

what is filiform?

Answer 4

located over entire surface – no taste buds.

Question 5

what is fungiform?

Answer 5

found on sides and tip of tongue.

Question 6

what is foliate?

Answer 6

series of folds on back and sides.

Question 7

what are the taste buds?

Answer 7

Transduction occurs when chemicals contact the receptor sites on the tips of the taste cell

Question 8

what are the neural pathways from the tongue to the cortex?

Answer 8

solitary nucleus, vagus nerve, oral cavity, glossopharyngeal nerve and facial nerve

Question 9

what is olfaction?

Answer 9

structure and function of odour

Question 10

what is the olfactory mucosa?

Answer 10

Membrane that contains the cilia of the olfactory receptors.

Question 11

what is the olfactory bulb?

Answer 11

Structure(s) containing the neural circuits that process olfactory information. Neurons receive information directly from the axons of the olfactory receptors

Question 12

how do we identify odours?

Answer 12

concentration needed to determine quality of an odorant.

Question 13

what is the puzzle of olfactory qual?

Answer 13

Some molecules that have similar structure smell different and Some molecules that have different structures smell the same

Question 14

what are the neural pathways from the nose to the cortex?

Answer 14

olfactory bulb, piriform cortex and orbitofrontal cortex

Question 15

what is flavour?

Answer 15

Flavour is a combination of smell, taste, and other sensations