NEUR20050 - transport across the cell membrane

how do molecules cross the membrane

• passive diffusion

• carrier mediated transport

• acrive carrier mediated transport that relies on enegry

• specific ion channels

what can pass through the cell membrane

• small and hydrophobic molecules pass through the membrane (O2/CO2 / N2)

• ions and hydrophilic molecules can not easily pass through the hydrophobic membrane

1. what is this

neruons

2. what is this

microglia

3. what is this

oligodendrocyes

4. what is this

astrocytes

5. what is this

neurophil → neuronal axonal and dendritic process and glial processes

what is osmosis

diffusion of water through a selectively permeable membrane like hte cell membrane - area of high concentration to low concentration.

hypertonic

high concentrations → shrivel

hypotonic

low concentrations → swell and rupture

isotonic

same concentration → into and out at the same rate

whats the ion concentrations in the cell

(Na+)sodium AND (CL-)chlorine are usually hgiher outisde the cell, and K+ potassium inside the cell

channel protein

a protein that allows the transport of specific substances across a cell membrane