Cellular Physiology 2

Question 1

EM =

Answer 1

RT/F log e (Ko/ Ki)

Question 2

RMP determined by K+ gradient because

Answer 2

1. K+ leakage that affects charge -> 150mM -> 4mM
2. gradient of Na+ maintained
3. Ek close to RMP - dynamic diffusion potential

Question 3

How do cells communicate?

Answer 3

1. Diffusible chemical signals
2. Direct surface contact between adjacent cells e.g. gap junction in cardiac myosin
3. Direct cytoplasmic contact via gap junctions

Question 4

Autocrine signalling affects

Answer 4

Secreting cell

Question 5

Endocrine and Pancrine signalling differs in

Answer 5

Quantity of chemical secreted

Question 6

Hormones are restricted by

Answer 6

specificity

Question 7

Benefits of synaptic signalling

Answer 7

Diverse, 10 chemical classes from inorganic gas to esters

Question 8

Receptors that detect water soluble signals are located in

Answer 8

plasma membrane