Protein-mediated transport

Question 1

P-type ATPase function

Answer 1

phosphorylates

Question 2

define V-type ATPase and what does it pump?

Answer 2

proton uniporter

H+ ions

Question 3

define uniporter carrier

Answer 3

diffuse one type of solute

Question 4

define co-transporter carrier (and what are the two types?)

Answer 4

diffuse more than one type of solute

antiporter (opp directions)

symporter (same direction)

Question 5

define channel

Answer 5

only functions in passive transport

Question 6

do carriers use ATP?

Answer 6

sometimes

they do either active or passive transport

Question 7

define F-type ATPase and what does it do?

Answer 7

proton uniporter

uses H+ gradient to generate ATP

Question 8

what is an ABC transporter? what does it pair with?
what is its function?

Answer 8

ATP-Binding Cassette transporter

2 ABCs pair with 2 TMDs (transmembrane domains)

both importer and exporter

Question 9

what is RVI?

Answer 9

regulatory volume increase

Question 10

what is RVD?

Answer 10

regulatory volume decrease

Question 11

when does a cell cause RVI? how does it do this?

Answer 11

during hypertonic stress / shock

transports solutes INTO cell, to cause water INFLUX

Question 12

when does a cell cause RVD? how does it do this?

Answer 12

during hypotonic stress / shock

transports solutes OUT of cell, to cause water EFFLUX