Task 3 - Neurons at rest

Question 1

Ion Pumps

Answer 1

convert energy from various sources (ATP, sunlight)

Question 1

Ion channels

Answer 1

control of electrical potential across the membrane

Question 2

Cell body

Answer 2

metabolic center of a neuron

Question 3

cell membrane

Answer 3

semipermeable, encloses the neuron

Question 4

dendrites

Answer 4

receive most of the synaptic contacts

Question 5

Axon Hillock

Answer 5

cone-shaped region between the axon and the cell body

Question 6

Myelin

Answer 6

fatty insulation around many axons

Question 7

Nodes of Ranvier

Answer 7

gabs between section of myelin

Question 8

Buttons

Answer 8

endings of the axon - release chemicals into synapses

Question 9

Synapses

Answer 9

chemical signals are transmitted

Question 10

Role of the membrane

Answer 10

composed of layers of fat molecules
Chanel proteins - certain molecules can pass
signal proteins - transfer a signal to the outside of the neuron when particular molecules bind to them on the outside of the membrane

Question 11

fatty acids

Answer 11

influence membrane fluidity and flexibility and the function of membrane proteins

Question 12

PUFAs

Answer 12

may act as antioxidants and may modulate inflammatory processes

Question 13

fat in our brain

Answer 13

essential in small quantities - involved in the formation of cell membranes, cellular transport and energy storage

Question 14

facilitated diffusion

Answer 14

passive movements of molecules along the concentration gradient - selective process

Question 15

simple difussion

Answer 15

substances move from higher to lower concentration - does not need a membrane protein that will help the substance to move downhill