Bio

If the sodium concentration inside a cell is greater than outside the cell, how can a cell take in more sodium?

• osmosis
• diffusion
• active transport
• passive transport

if you put a plant in salt water it will ...

• swell because water diffuses into the cells
• swell because water diffuses out of the cell
• shrivel because water diffuses out of the cell

Your gums are swollen. How will rinsing with warm salt water help the swelling?

• swollen gums will absorb the salt
• salt lowers the temp
• salt goes against the concentration gradient
• water in the gums has diffused out of the cells

Which is true about active transport?

• It requires energy
• it does not require energy
• It moves substances down the concentration gradient
• it moves material from high to low concentration

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

Movement across the cell membrane that does not require energy is called

• active transport
• passive transport

This picture represents which type of cellular transport?

• passive transport
• endocytosis
• exocytosis
• osmosis

The concentration of water is higher in the soil than in plant root cells. Water moves into root cells of a plant by...

• Facilitated Diffusion
• Simple Diffusion
• Active Transport
• Osmosis

This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

• vacuole

• nucleus

• plasma membrane

• cell wall

Tags

NGSS.HS-LS1-3

What does it mean that a cell membrane is semi-permeable?

• It allows all substances in
• It allows some substances in
• It allows nothing in