Homeostasis in Cells

Which molecule is in equilibrium? How can you tell?

• Molecule A; equal amounts inside and outside

• Molecule B; passive movement into the cell

• Molecule C; equal amounts inside and outside

• Molecule C; all molecules are inside the cell

Tags

NGSS.MS-LS1-2

Match the following scenarios with the direction of water movement.

• Cell in a hypertonic solution

• Water will move in and out of the cell

• Cell in a hypotonic solution

• Water will move out of the cell

• Cell in an isotonic solution

• Water will move into the cell

Moving ions against a concentration gradient requires energy and results in uneven concentrations of the ions. ATP powers the pump, allowing it to create and maintain _______________ of these ions.

• equilibrium

• concentration gradients

• diffusion

• osmosis

Tags

NGSS.MS-PS3-5

___________ strengthens and stabilizes the cell membrane.

• Carbohydrates 

• Proteins 

• Phospholipids 

• Cholesterol

What happens to a plant cell in a hypotonic solution?

• The cell remains unchanged

• The cell bursts

• The cell swells and becomes turgid

• The cell shrinks

Tags

NGSS.MS-LS1-2

Label the following as Passive or Active transport.

a

b

Passive

Active

The molecules in this image are moving via PASSIVE TRANSPORT through the cell membrane. Click on the side of the cell membrane that the molecules are moving to.

What best describes the solution the cell is in?

• Hypotonic Solution

• Hypertonic Solution

• Isotonic Solution

which side is hypertonic?

• Left. Low concentration

• Right. High concentration

In the cell pictured, where would water move?

• Into the cell, causing it to swell

• Out of the cell, causing it to shrink

• In and out of the cell equally, causing the shape to stay the same

Tags

NGSS.MS-LS1-2