composition of cells

Question 1

Volume of plasma

Answer 1

3 liters

Question 2

Extracellular fluid

Answer 2

13 liters plus another 5 for the ‘third space’

Question 3

Intracellular fluid

Answer 3

27 liters

Question 4

ECF solute composition

Answer 4

140mM Na+, 5mM K+, 145mM Cl-, ~0 mM A-n

Question 5

ICF colute composition

Answer 5

14mM Na+, 145mM K+, 5mM Cl-, 126mM A-n

Question 6

functional properties of membranes

Answer 6

Lipid composition of membrane allows it to withstand imposed electric force from the electrical potential differences created between the inside and outside of the cell due to excess anions inside cell. Impermeable to charged substances. Channels and transporters allow for the transport of charged and polar molecules when needed.

Question 7

gated ion channels opening

Answer 7

can be voltage-gated, mechanically gated, chemically (receptor) gated, temperature gated, multiple, or no gates (aquaporins)