Physiology

Question 1

what are tight junctions?

Answer 1

they join the lateral edges of epithelial cells together at apical membranes

Question 2

what are desmosomes?

Answer 2

junctions that anchor cells together that stretch eg uterus and heart

Question 3

what are gap junctions?

Answer 3

allows movement of charged ions between 2 cells

Question 4

what two factors affecting the permeability of cell membrane

Answer 4

size and solubility of the particle

Question 5

what factors affect Ficks Law of Diffusion

Answer 5

magnitude of conc gradient
SA of membrane where diffusion occurs
lipid solubility and distance of diffusion

Question 6

what channels do water move through

Answer 6

Aquaporins

Question 7

what is osmolarity

Answer 7

concentration of osmotically actively particles in a solution

Question 8

how does a cell change in hypotonic solution

Answer 8

less solute, more water

water moves in so cell size increases

Question 9

how does a cell change in hypertonic solution

Answer 9

more solute, less water

water moves out of cell so cell size decreases

Question 10

describe primary active transport

Answer 10

energy directly required to move substance across membrane

Question 11

describe secondary active transport

Answer 11

energy not used to split ATP instead used to move molecule with ion gradient

Question 12

what are the functions of the Na+/K+ATPase

Answer 12

establish ion concentrations
regulate cell volume
provides energy for secondary active transport

Question 13

what are three areas to measure temperature

Answer 13

tympanic
rectal
oral

Question 14

where is the temperature control centre located

Answer 14

hypothalamus

Question 15

what temperature is classified as a fever

Answer 15

above 38 degrees

Question 16

how do you calculate MAP

Answer 16

diastolic + 1/3(systolic - diastolic)