Lecture 03-04

Question 1

within neurons are what type of communciation?

Answer 1

electrical

Question 2

between neurons are what type of communication

Answer 2

chemical

Question 3

What type of charges repel/attract

Answer 3

same charges repel, opposite charges attract

Question 4

which way does diffusion go?

Answer 4

from high concentration to low

Question 5

in the cell membrane where is the high concentration of NA? and therefore what about K?

Answer 5

Higher concentration of NA on outside, and therefore higher K on inside
Therefore sodium moves through the cell membrane

Question 6

resting membrane potential

Answer 6

when there is a maintain of concentration and electrical differences, i.e equilibrium, the resting rate is -65mV to -70 mV

Question 7

what is the electrochemical gradient

Answer 7

combo of concentration gradient and voltage difference

Question 8

What first happens during chemical communication between neurons?

Answer 8

chemicals released from pre-synpatic neuron to synpatic cleft.
Neurotransimtters diffuse across synapse where it can combine with a receptor.

Question 9

Membrane depolarization