fong IV

Question 1

what are epithelia?

Answer 1

polarized cell sheets separated by tight junctions

Question 2

what are the transport proteins

Answer 2

• pumps
• carriers (symporters, anitporters, etc)
• channels

Question 3

what are the transport processes?

Answer 3

• active (pumps)
• secondary active (coupled carriers)
• passive (channels, some carriers)

Question 4

what uses secondary active transport>

Answer 4

PT reabsorption of glucose

Question 5

this pump maintains low intracellular Na+and thereby facilitates the apical uptake of glucose

Answer 5

SGLT

Question 6

basolateral glucose moves passively via

Answer 6

GLUT

Question 7

what does the PT reabsorb?

Answer 7

HCO-/3

Question 8

CA inhibitors inhibit what process?

Answer 8

PT reabsorption of HCO-/3

Question 9

the proximal tubule effeciently recovers what?

Answer 9

• filtered amino acids
• oligopeptides
• low molecular weight proteins (LMPs)

Question 10

are PTs highly water permeable?

Answer 10

yes

Question 11

transport in the PT is

Answer 11

iso-osmotic

Question 12

should there be any pressure in the bowmans capsule in health?

Answer 12

no