Nervous System Flashcards
(19 cards)
Label eye
Cornea- outside or eye
Lens - middle circle( pupil)
Iris - muscle over pupil
Fovea- back of eye
Function of retina
Absorbs light, colour vision
How does the eye get light
Controls dilation and focuses imagine onto retina
How does the eye get light
Controls dilation and focuses imagine onto retina
Two ways the nervous system controls the the light going into the eye
Focuses image on retina , controls dilation
Advantage of eye positioning in sheep
Wide angel vision(side of the head) to detect danger
Function of iris
Control how much light enters eye
Function of lens
Focuses light on objects
Function of retina
Absorbs light and detects colour
Function of the cornea
Protection
Role of tapetum lucidum
Bounces light back and improves vision
Two parts of the central nervous system
Brain and spinal chord
Function of parasympathetic nervous system
Slows heart rate
constricts pupils
Stimulates saliva
Contracts bladder
Symptoms of listeriosis
Loss of appetite
Fever
Loss of balance
Owl eye adaptations
Binocular vision to see prey
Photoreceptors in eye
Rods and cones
Adaptions to help animals see in the dark
Large pupils
More rods
Reflective layer
How do sense organs cause a response to stimuli
Receptors detect stimuli
Effectors generate response
Sends impulses to CNS
Two functions of sympathetic nervous system
Dilates pupils
Relaxes bladder
Inhibits salvation
