Lecture 12

Question 1

External senses include

Answer 1

Sight, hearing, taste, smell, and touch

Question 2

Internal sensing systems

Answer 2

– Detect internal environment state; hypothalamus plays a central role in numerous internal senses

Question 3

Neuron Structure

_____ ____: bulk of the cytoplasm sits in basic round shape, hub

Answer 3

Cell body (Soma)

Question 4

Neuron structure

_______ – receive input, can be highly branched

Answer 4

Dendrites

Question 5

Neuron structure

____ – send output away from cell body

Answer 5

Axons

Question 6

______– Cells that provide physical support, help maintain homeostasis in interstitial fluid, and guide neuron growth

Answer 6

Neuroglia

Question 7

______: Connect one neuron to another within the spinal cord and brain

*makes up 90% of neurons

Answer 7

Interneurons

Question 8

Microglia –

Answer 8

Immune derived cells that constantly survey the CNS environment, capable of phagocytosing debris

Question 9

Astrocytes –

Answer 9

Regulate CNS extracellular environment, recycle neurotransmitters released into synapses

Question 10

Oligodendrocytes –

Answer 10

Cells that coat axons with their cell membrane forming myelin sheaths, promotes faster nerve signal transmission

Question 11

Ependymocytes –

Answer 11

Line the cavities of the CNS, produces the cerebrospinal fluid that bathes the CNS

Question 12

Na+ is high inside/outside cell
K+ is high inside/outside cell
Cl- is high inside/outside cell

Answer 12

Na+ is high outside cell
K+ is high inside cell
Cl- is high outside cell