Sense Organs

Question 1

Cones

Answer 1

Photoreceptors in the retina that distinguish different colors

Question 2

Cornea

Answer 2

Tough, clear covering that protects the eye and allows light to pass through

Question 3

Humor

Answer 3

Fluids that maintain the shape of the eyeball

Question 4

Iris

Answer 4

Colored part of the eye that controls how much light enters the eye

Question 5

Lens

Answer 5

Focuses light onto the retina

Question 6

Pupil

Answer 6

Small opening in the middle of the iris

Question 7

Retina

Answer 7

Converts light into nerve impulses that are carried to the brain

Question 8

Rods

Answer 8

Photoreceptors in the retina that are extremely sensitive, but do not distinguish different colors (black and white)
Important for night vision

Question 9

Rhodopsin

Answer 9

Protein that receives visual signal

Question 10

Optic nerves

Answer 10

transmit info to brain

Question 11

Auditory canal

Answer 11

ear canal, where sound enters

Question 12

Cochlea

Answer 12

fluid-filled part of inner ear, sends nerve impulses to brain

Question 13

Ear bones

Answer 13

hammer, anvil, and stirrup; transmit vibrations from eardrum to oval window

Question 14

Eustachian tube

Answer 14

equalizes pressure between environment and inner ear

Question 15

Oval window

Answer 15

Sends waves of pressure to the cochlea

Question 16

Semicircular canals

Answer 16

fluid filled, helps maintain balance

Question 17

Tympanum

Answer 17

ear drum, vibrates as sound waves hit it

Question 18

Olfactory receptors

Answer 18

chemical sensors found in the olfactory membrane, which lies in the upper part of the nostrils

Question 19

Cerebral cortex

Answer 19

Controls all voluntary motor activity
Memory and creative thought
Left and right hemispheres

Question 20

Olfactory lobe

Answer 20

center for reception of smell

Question 21

Thalamus

Answer 21

Nervous impulses and sensory info are relayed to and from the cerebral cortex

Question 22

Hypothalamus

Answer 22

Homeostasis

Hunger, thirst, pain, temp regulation, water balance

Question 23

Medulla oblongata

Answer 23

breathing

Question 24

Reticular Activating System

Answer 24

network of neurons in the brain stem that processes signals from sensory inputs

Question 25

Spinal cord

Answer 25

route for axons to travel out of the brain
center for many reflex actions
Dorsal and ventral horns

Question 26

Dorsal horn

Answer 26

entrance for sensory nerve fibers or afferent neurons

Question 27

Ventral horn

Answer 27

contains cell bodies of motor or efferent neurons

Question 28

afferent

Answer 28

sensory

Question 29

efferent

Answer 29

motor