Senses Of Teste And Smell

Question 1

Taste cells and olfactory cells are classified as chemoreceptors because are sensitive to chemicals molecules in the food we eat and air we breath

Answer 1

Sense of taste
• buds are located primarily in the tongue and found in hard palate, pharynx, and epiglottis.
• different receptors exist for salty, sour, bitter, sweet and umami ( savoury).
• Umami receptors detect the amino acid glutamate found many protein rich foods.

Question 2

How the brain receives taste information

Answer 2

• Taste buds open at pore
• Taste pore surrounded by supporting cells and taste cells.
• taste cells have microvilli with receptors.
• when molecules bind to receptors, nerve impulses sent to the brain.
The gustatory cortex in the brain then interprets these nerve impulses as particularly tastes.

Question 3

Sense of smell

Answer 3

• between 80- 90 of we perceives as taste is actually smell
• olfactory cells are modified neurons located along the apper surface of the nasal cavity./ has cilia with receptors for odor molecules

Question 4

How the brain receives odor information

Answer 4

• each olfactory has only one type of receptor protein.
• 1000 different types.
• a single odor is composed of many different molecules that activitie combination receptor protein.
• nerve fibers lead to the olfactory bulb, an extension of a cranial nerve.