Cell Transport and Homeostasis

Diffusion occurs because

• molecules are attracted to one another

• molecules constantly move and collide with each other

• cellular energy forces molecules to collide with each other

• cellular energy pumps molecules across the cell membrane

Tags

NGSS.MS-PS1-5

The diffusion of water across a semipermeable membrane is called

• osmotic pressure

• pinocytosis

• active transport

• osmosis

What is active transport?

• Movement of materials across the cell membrane WITHOUT using cellular energy

• Movement of particles across the cell membrane USING energy

The relatively constant internal physical conditions of an organism is called

• cell specialization

• an organ system

• homeostasis

• uniceullularity

Tags

NGSS.HS-LS1-3

An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes

• WATER to move INTO the cell

• WATER to move OUT of the cell

• SOLUTES to move INTO the cell

• SOLUTES to move OUT of the cell

During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will

• move across the membrane to the outside of the cell

• stop moving across the membrane

• keep moving from both sides at equal rates

• move across the membrane to the inside of the cell

Which process always involves the movement of materials from inside the cell to outside the cell?

• diffusion

• exocytosis

• endocytosis

• osmosis

An example of active transport is

• facilitated diffusion

• osmosis

• diffusion

• endocytosis

Can other substances besides water undergo osmosis?

• YES!

• NO!

Which is TRUE of ALL single-celled organisms?

• They are all prokaryotes

• They are all bacteria

• They all reproduce

• They all have a nucleus