Extra

Question 1

T/F there are more mEquiv/L in the ICF than in the ECF

Answer 1

true
ICF has soluble proteins
(gibbs-donnan effect… though not quite gibbs-donnan equilibrium in physiological cases)

Question 2

T/F inhibition of the cellular synthesis of ATP will eventually inhibit the net transport of glucose by the sodium-dependent cotransporter

Answer 2

true

Question 3

T/F a carrier system that is not coupled to any source of energy can only perform passive transport

Answer 3

true
i suppose secondary active transport is technically coupled to a source of energy…in the form of the Na+ electrochemical gradient!

Question 4

T/F the GLUT2 transporter functions by secondary active transport

Answer 4

false

GLUT2 is just a facilitated glucose transporter… it is not the Na+ glucose symport

Question 5

T/F the H+ pump is an H+ ATPase that secretes H+

Answer 5

true

Question 6

T/F transepithelial absorption requires the selective insertion of transporter proteins in the luminal and basolateral membranes of the epithelial cells

Answer 6

true

Question 7

T/F tight junctions between epithelial cells are permeable to ions and small molecules

Answer 7

true

Question 8

T/F a cation may move from a region of negative electrical potential to a region of positive electrical potential in the absence of active transport

Answer 8

true

concentration gradient can be greater than electrical gradient

Question 9

T/F electrochemical equilibrium is achieved because the voltage difference across the membrane produces a flux equal but opposite to the flux due to the concentration gradient

Answer 9

true