lecture 2

Question 1

how did Golgi visualize neurons

Answer 1

soaked and stained brains in solution

Question 2

what are the four regions of a neuron

Answer 2

1. soma
2. axon and axon collaterals
3. dendrites (spiny or smooth)
4. pre synaptic release sites (terminals, boutons and non-localized sites)

Question 3

what does the size of a dendrite indicate about a neuron

Answer 3

its convergence (inputs)
the territory that neutron will pay attention to

Question 4

cell body characteristics

Answer 4

main metabolic centre of neuron- lots of. mitochondria
site of protein synthesis- lots of endoplasmic reticulum
around 8-200um

Question 5

dendrites characteristics

Answer 5

primary sites of INPUT from other neurons 
can release Its
contains ribosomes (can make proteins)
vary in diameter
contain lots of actin

Question 6

axon characteristics

Answer 6

specialized for relaying electrical signals (conduct AP)
vary in length but constant diameter
contain microtubules and MTBP - involved in transport
always have specialized areas to release NTs

Question 7

how do neutrons communicate with eachother

Answer 7

synapses

Question 8

what is a directed synapse

Answer 8

transmitter is released onto a receptor ~15nm away from the cleft
ex. axo-dendritic, axo-somatic, axo-axonic

Question 9

what is a non directed synapse

Answer 9

transmitter is released onto a synapse many um away

Question 10

what is 2 photon microscopy

Answer 10

Winifred denk- concept that putting in 2 red photons very fast will act the same way as 1 blue would - can use green fluorescence using red light

Question 11

spine characteristic

Answer 11

compartmentalize biochemical processes driven by calcium

produce amplification of local voltage changes if voltage gated channels are in spine head

Question 12

what is convergence

Answer 12

the number of inputs to a single neuron

Question 13

what is divergence

Answer 13

number of targets innervated by one neuron