7.4 Homeostasis and Cells

Homeostasis is maintaining

• an elevated temperature.

• a constant internal environment.

• the ability of your body to create white blood cells.

• a constant external environment.

Which describes how water moves in and out of cells?

• never

• sometimes

• always

• none of the above

True or False: When the body cannot maintain homeostasis, you could die.

• True

• False

• your

The process by which a cell membrane surrounds a particle and encloses the particle in a vesicle to bring the particle into the cell

• mitosis

• meiosis

• endocytosis

• exocytosis

Homeostasis is the maintenance of a constant _ state in a changing environment.

• internal

• external

The movement of particles from regions of higher concentration to regions of lower concentration.

• endocytosis

• exocytosis

• homeostasis

• diffusion

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

Osmosis it the diffusion of __________.

• water
• glucose
• air
• passive transport

Active transport requires _______.

• food
• energy
• space
• nothing

During osmosis and diffusion substances pass through which organelle?

• nucleus
• cell membrane
• endoplasmic reticulum
• golgi body