Chp 14 Active Transport

Question 1

co-transport and counter transport are examples of primary active transport T or F

Answer 1

False. Co-transport and counter transport (symporters and antiporters) are examples of secondary active transport.

Question 2

What drives secondary active transport

Answer 2

concentration gradient (often a gradient created from a primary transport )

Question 3

In secondary active transport symporters move one molecule _____ concentration gradient and another molecule ______ concentration gradient in the _______ direction(s). What is an example of this type of transport

Answer 3

With its concentration gradient (high to low)
Against its concentration gradient (low to high)
Same direction
SGLT is an example of this. Sodium-glucose

Question 4

When a molecule moves against its concentration gradient it moves from high to low concentration T or F

Answer 4

False. A molecule moved against its concentration gradient moves from low to high. (Think about equilibrium - why move something to already high concentrations - this takes energy)

Question 5

In symport both substrates must be present for transport T or F

Answer 5

True

Question 6

In antiports one molecule is moved ______ its concentration gradient and another is moved _____ its concentration gradient. Molecules are moved in ______ direction(s). What is an example of this?

Answer 6

With its concentration gradient (high-low)
Against its concentration gradient (low-high)
Molecules are moved in opposite directions
Sodium calcium antiporter (cardiac muslce)

Question 7

Primary active transport can create ion gradients that can be used for powering secondary active transport T or F

Answer 7

True!

Question 8

Glucose is moved by co-transport T of F

Answer 8

True!

Question 9

Amino acids are moved by co-transport T or F

Answer 9

True!