Nervous System (appendix)

Question 1

Two categories of cells

Answer 1

Nerve cells (neuron)

Neurological cells (glia); support neurons

Question 2

Neuron parts

Answer 2

Dendrites: receive info, around soma

Soma: cell body, integrates signal and creates new signal

Axon: sends this signal to further neuron

Axon terminal; connected to dendrites of next cell (synaptic cleft)

Question 3

Types of neurons

Answer 3

Retinal (small and simple)

Pyramidal (cortex, lot bigger and dendrites to own axon)

Purkinje (in cerebellum, LOT of dendrites)

Question 4

PNS main function

Answer 4

Connecting CNS to limbs and organs. Group of these are called ganglion

Question 5

3 systems in PNS

Answer 5

Sensory system; translate all sensory input

Somatic motor system: voluntary muscle movements

Automatic motor system; automatic movements. Symp costs energy, parasymp saves energy