Homeostasis and Transport

When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of

• Osmosis

• Diffusion

• Equilibrium

If the dots represent sugar which is more concentrated

• Inside the cell

• Outside the cell

• Neither they are equal (equilibrium)

Tags

NGSS.HS-LS1-3

Which of the following is NOT a function of a cell membrane?

• regulates (controls) passage of molecules into and out of the cell

• provides mechanical shape

• maintains cellular balance (homeostasis)

• responsible for the synthesis of ATP

Tags

NGSS.HS-LS1-3

Which molecule in cell membranes reduces the permeability of the membrane to most biological molecules? (i.e. what is most responsible for keeping things out?)

• A. Proteins

• B. Phospholipids

• C. Cholesterol

• D. Glycolipids

A/an protein allows a particular molecule or ion to freely cross the cell membrane as it enters or exits the cell.

• A. Transport

• B. Peripheral

• C. Enzyme

• D. Receptor

10. Substances diffuse from:

• A. Low to high concentration

• B. High to low concentration

• C. Concentration doesn't matter for diffusion

• D. Left to right

11. The diffusion of water through a selectivelypermeable membrane is called:

• A. Active Transport

• B. Osmosis

• C. Endocytosis

• D. Exocvtosis

• E. Equilibrium

When a saltwater plant is placed in freshwater, which direction will osmosis occur?

• Water will diffuse into the plant cell

• Water will diffuse out of the plant cell

• Water will not diffuse

• Against the concentration gradient

Tags

NGSS.MS-LS2-1

Cells need to bring in molecules to carry out cellular processes. Often, this requires moving the molecules across the cell membrane against the concentration gradient. How can these molecules get into the cell?

• By passive transport via diffusion

• By active transport using ATP

• By passive transport via osmosis

• By active transport via facilitated diffusion

15. A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?

• A. The swollen gums have absorbed the saltwater solution.

• B. The saltwater solution lowers the temperature of the water in the gums.

• C. The salt in the solution has moved against the concentration gradient. 

• D. The water in the gums has moved out due to the high concentration of salt in the solution.

Tags

NGSS.MS-PS1-2