Sense Organs

Question 1

What is the basic unit of sensory organs?

Answer 1

sensory receptor

Question 2

What are the three categories of sensory organs?

Answer 2

1. Sensory Modality (visual, auditory, etc.)
2. Location (interoreceptors & exteroreceptors)
3. Structural and Functional Distribution

Question 3

What receptor provides information about the external environment?

Answer 3

General Somatic Receptor

Question 4

Cutaneous receptors and proprioceptors are examples of what kind of receptors?

Answer 4

general somatic receptor

Question 5

What receptor provides information about the organism’s internal environment?

Answer 5

general visceral receptors

Question 6

What receptors monitor oxygen and carbon dioxide content of blood, blood pressure, and concentration of solutes (General)?

Answer 6

visceral receptors

Question 6

What receptors are confined to the head (esp. in amniotes and terrestrial amphibians)?

Answer 6

special sensory organs

Question 7

What receptors (specifically) provide information about body position and is located in skeletal muscles, joints, and tendons?

Answer 7

proprioceptors

Question 7

Where are neuromast organs found?

Answer 7

skin of fishes and aquatic amphibians

Question 7

What is the function of neuromasts?

Answer 7

detect water currents & ‘hear’ sounds via vibrations

Question 7

What cells are present in neuromast organs?

Answer 7

hair cells (receptor cells) & supporting cells

Question 8

______ cells have several short cilia & kinocilia that project into fluid or cupula.

Answer 8

hair

Question 9

Hair cells contain what structures that project into fluid or cupula?

Answer 9

cilia & kinocilia

Question 10

How does the cilia and kinocilia generate nerve impulses?

Answer 10

The displacement of the cupula and cilia generates nerve impulses.

Question 11

Supporting cells are also known as what?

Answer 11

sustentacular cells

Question 12

What structures consist of 3 semicircular canals, a utriculus, & a sacculus in higher vertebrates?

Answer 12

membranous labyrinth

Question 13

What is the function of the membranous labyrinth?

Answer 13

physical equilibrium and hearing

Question 14

In the membranous labyrinth, what structure is responsible for hearing?

Answer 14

Organ of Corti (located at the lagena)

Question 15

What are the infared receptors or thermoreceptors found in reptiles?

Answer 15

pit receptors of reptiles

Question 16

What are the two types of pit receptors?

Answer 16

labial pits, loreal pits

Question 17

What kind of pits are found in pythons?

Answer 17

labial pits

Question 18

What kind of pits are found in vipers which can detect temperature changes of as little as 0.001 degree celcius?

Answer 18

loreal pits

Question 19

What are the 2 types of photoreceptors?

Answer 19

median eye & typical bilateral eye

Question 20

Structures associated with what indicate function in detecting light intensity and not image-forming?

Answer 20

epiphysis

Question 21

What cells does the olfactory epithelium contain?

Answer 21

basal cells, supporting cells, olfactory receptor cells

Question 22

What olfactory organ is found only in tetrapods but absent in most amniotes?

Answer 22

vomernasal organs

Question 23

Some snakes use their tongue to gather odorant molecules (snake flicking its tongue). It delivers the information to the vomeronasal organ (Jacobson’s organ) for what?

Answer 23

chemoreception

Question 24

Where are the vomeronasal organs located in mammals?

Answer 24

in an isolated area pf the olfactory membrane within the nasal cavity

Question 25

What cells are present in taste buds?

Answer 25

supportive (sustentacular) cells & gustatory cells