Cell Homeostasis

What is a molecule that allows signal molecules to bind?

• Receptor

• Ligand

• Enzyme

• Substrate

What is an example signal sent between cells?

• epinephrine

• potato

• DNA

• nucelus

Which of the following describes homeostasis?

• keeps variables exactly at the set point

• organism's ability to maintain steady (stable) internal conditions

• acts to keep values outside of a desired range

• operates through positive feedback

Tags

NGSS.HS-LS1-3

NGSS.HS-LS2-5

What is another word that can be used to describe "homeostasis"?

• STABLE

• EQUAL

• COMPLETE

• CORRECT

Check all that apply. Which of the following are examples of an organism maintaining homeostasis?

• Shivering when cold

• Sweating when hot

• Fever - an immune response when sick

• Vomiting - releases toxins and wastes

I store water in both plant and animal cells. What am I?

• cytoplasm

• ribosomes

• vacuole

• lysosomes

Tags

NGSS.MS-LS1-2

Active transport requires

• osmosis

• energy

• a hypotonic solution

• a concentration gradient

Which is an example of a hypertonic solution that a human cell could be placed into?

• Saltwater

• a solution equal to the concentrations of the cell

• pure water (no solutes)

Movement of particles or molecules from an area of high concentration to an area of low concentration is called

• Photosynthesis

• Concentration gradient

• Diffusion

• Active Transport

Why would a plant cell become wilted in a concentrated sugar solution?

• the cell would gain water by the process of osmosis

• the cell would lose water by the process of osmosis

• the cell would lose water because of active transport

• the cell would gain water because of active transport

Tags

NGSS.MS-LS1-5