Intro Lec 1

Question 1

Subventricular zone

Answer 1

Supports olfactory fxn in rodents
supports striatal (basal ganglia) fxn in humans

Question 2

Subgranular zone within the hippocampus

Answer 2

Supports memory fxn

Question 3

Gray matter

Answer 3

increases with learning

Ex: london taxi driver

Question 4

Who has profound influences on other scientists, artists, and philosophers

Answer 4

Galen
da Vinci
Vesalius

Question 5

Three basic fans of NS

Answer 5

Senstation
Perception
Action

Question 6

The gain in the brain…

Answer 6

came mainly from the stain

Question 7

Large dendritic cells

Answer 7

Pyramidal cells in cerebral cortex/Purkinje cells

collect and/or integrate info, then send to target

Question 8

Bipolar cells

Answer 8

Relay stations

Question 9

Astrocytes

Answer 9

-Glial cell in CNS
-bridge neurons and capillary endothelial cells
-Mechanical and metabolic support to neurons
-contribute to BBB and control transport from blood to neural tissue
from ectoderm

Question 10

Oligodendocyte

Answer 10

Glial cell in CNS
Forms part of myelin sheath
From ectoderm

Question 11

Microglia

Answer 11

Glial cell in CNS
from hematopoetic sources
provide protection to nerve tissue

Question 12

Free nerve endings

Answer 12

Little to no myelin

most sensitive to pain and temp

Question 13

thicker myelinated axons Pacinian and meissner corpuscles

Answer 13

Light touch and vibration

Question 14

thicker myelinated axons ruffini corpuscles and merkel disks

Answer 14

sustained pressure

Question 15

Steps of knee jerk reflex- Hammer tap

Answer 15

1st step

Stretches tendon which stretches sensory receptors in leg extensor muscle

Question 16

Steps of knee jerk reflex- 2nd steps

Answer 16

• Sensory neuron synapses and excites motor neuron in spinal cord
• Sensory neuron also excites interneuron
• interneuron synapse inhibits motor neuron to flexor muscles

Question 17

Steps of knee jerk reflex- 3rd steps

Answer 17

• Motor neuron conducts AP to synapses on extensor muscle fibers, causing contraction
• flexer muscle relaxes b/c the activity of it motor neurons has been inhibited

Question 18

Steps of knee jerk reflex- 4th step

Answer 18

leg extends

Question 19

Sensory neurons

Answer 19

Afferent
long dendrite
short axons
carry info from sensory receptors to CNS

Question 20

Motor Neurons

Answer 20

efferent
long axon
short dendrites
CNS to muscles or glands

Question 21

Interneurons

Answer 21

found only in CNS

interconnect other neurons

Question 22

Size in somatosensory cortex

Answer 22

directly proportional to the # and density of sensory fibers

-NOT surface area or size of the body part