4-4 Active Transport

The movement of ions or molecules up their concentration gradient or towards the side of the membrane with a higher concentration.

• active transport

• osmosis

• diffusion

• facilitated diffusion

Active transport happens by carefully controlling how a ___ opens and closes to one side of the membrane to another.

• transport protein

• phospholipid

• carbohydrate

• nucleic acid

Active transport requires energy.

• True

• False

What molecule acts as the "battery" of the cell?

• ATP

• glucose

• DNA

• phospholipid

Tags

NGSS.HS-LS1-7

ATP is used to change the ___ of a protein.

• color

• shape

• size

• DNA

Which ion acts as a signaling molecule telling a muscle cell to contract?

• calcium

• sodium

• potassium

• chloride

A muscle cell must pump out calcium using active transport in order for the muscle to

• contract

• relax

____ occur(s) if a muscle cell can not pump calcium out fast enough

• cramps

• relaxation

Tags

NGSS.HS-LS1-3

Which of the following affect the rate of active transport?

• temperature

• concentration of ion/molecule being transported

• number of transport proteins available

• ATP availability

In the sodium-potassium pump, ___ sodium ions are transported out of the cell and ___ potassium ions are transported into the cell.

• 3, 2

• 2, 3

Tags

NGSS.HS-LS1-3