Evolution of the Nervous System

1
Evolution of the Nervous System
Sponges-NOT
2
Divisions of the Vertebrate Nervous System
3
Autonomic Nervous System
Sympathetic
Parasympathetic
Brain stem, sacral Ganglia near
target Acetylcholine Inhibits stress
Thoraco-lumbar Ganglia near spinal
cord Adrenalin/noradrenaline Triggers stress
4
(No Transcript)
5
(fusion of ganglia)
6
(No Transcript)
7
(no Schwann cells)
8
Ventral ganglia control walking, etc.
Leg muscle
axon
9
(simple eye)
10
(No Transcript)
11
(No Transcript)
12
Mosaic theory of Insect vision
-Good for detecting motion -Nearsighted -Poor
visual acuity
Spectrum of light
Human detection
Honeybee detection
13
Basic mechanoreceptor is a hair with a nerve cell
attached