12.01.15 Catalyst
Think!
• Name as many parts of the nervous
system as you can.
• Which is the most important?
•
I will describe the role of the nervous
system and investigate my sensory
neurons.
Fig. 49-1
Fig. 49-2
Eyespot
Brain
Radial
nerve
Nerve
cords
Nerve
ring
Transverse
nerve
Nerve net
Brain
Ventral
nerve
cord
Segmental
ganglia
(a) Hydra (cnidarian)
(b) Sea star (echinoderm)
(c) Planarian (flatworm)
(d) Leech (annelid)
Brain
Brain
Ventral
nerve cord
Anterior
nerve ring
Ganglia
Brain
Longitudinal
nerve cords
Ganglia
(f) Chiton (mollusc)
(g) Squid (mollusc)
Spinal
cord
(dorsal
nerve
cord)
Sensory
ganglia
Segmental
ganglia
(e) Insect (arthropod)
(h) Salamander (vertebrate)
Fig. 49-14
Pallium
Cerebrum
Cerebellum
Cerebral
cortex
Cerebrum
Cerebellum
Thalamus
Thalamus
Midbrain
Midbrain
Hindbrain
Avian brain
Avian brain
to scale
Hindbrain
Human brain
Fig. 49-4
Central nervous
system (CNS)
Brain
Spinal cord
Peripheral nervous
system (PNS)
Cranial
nerves
Ganglia
outside
CNS
Spinal
nerves
Fig. 49-7-2
PNS
Afferent
(sensory) neurons
Efferent
neurons
Autonomic
nervous system
Motor
system
Locomotion
Sympathetic
division
Parasympathetic
division
Hormone
Gas exchange Circulation action
Hearing
Enteric
division
Digestion
Fig. 49-3
Patellar Reflex — Knee jerk
Sensory neuron
Motor neuron
Interneuron
Fig. 49-3
Patellar Reflex — Knee jerk
Cell body of
sensory neuron
Spinal cord
(cross section)
Sensory neuron
Motor neuron
Interneuron
Fig. 49-15
Frontal lobe
Parietal lobe
Speech
Frontal
association
area
Somatosensory
association
area
Taste
Reading
Speech
Hearing
Smell
Auditory
association
area
Visual
association
area
Vision
Temporal lobe
Occipital lobe
Fig. 49-16a
Toes
Lips
Jaw
Primary
motor cortex
Investigation: What’s your level
of perception?
•
Read through the big idea on your notes
page.
•
How will we combat bias in this lab?
•
Locations Tested: back of neck, back of
hand, fingertip, forearm (inside &
outside), lips or cheeks.
Groups of 3 — Tables
1. Complete the question, hypothesis and
variables
2. Send one person (with your answers) up to
retrieve your materials.
- 1 piece of paper, scissors,
8 toothpicks