Cells, Transport, Energy

What process occurs when WATER diffuses across a membrane?

• endocytosis
• mitosis
• osmosis
• nuclear fission 

When particles move from areas of high concentration to areas less concentrated, this has taken place.

• diffusion
• mitosis
• endocytosis
• photosynthesis

Tags

NGSS.MS-PS1-4

Why is diffusion and osmosis important to cells?

• It allows them to take in materials without using energy.
• It allows them to reproduce.
• It allows them to absorb sunlight.
• It allows cells to use all energy.

Tags

NGSS.HS-LS1-3

The cell membrane is said to be selectively-permeable, what does this mean?

• The cell controls what passes in and out of the cell

• Nothing gets through

• The cell lets only large substances through

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck

Movement of particles from high to low concentration. They are said to go "DOWN the concentration gradient"

• Passive Transport

• Active Transport

What is it called when large molecules move across the cell membrane from an area of high concentration to an area of low concentration through a protein channel?

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

How does a cell maintain homeostasis?

• By controlling what enters and leaves the cell

• Flexibility

• Protective barrier

• Structure and support

Tags

NGSS.HS-LS1-3

When there is an equal number of molecules on the inside and outside of the cell, that is called-

• difference

• transportation

• homeostasis

• solution

Tags

NGSS.HS-LS1-3