Unit 4 Cell Transport Review

What is the significance of selective permeability to biological membranes?

• Selectively permeability allows the cell membrane to control traffic into and out of the cell.

• Selectively permeability prevents toxic materials from entering the cell.

• Selectively permeability permits the selective uptake of nutrients and the elimination of wastes.

• All the options are correct

Which of the following statements BEST describes the difference between active transport and passive transport?

• Active transport has a concentration gradient, passive does not.

• Active transport is the movement of very small molecules, passive is the movement of large molecules

• Active transport requires energy from the cell, passive does not require energy.

• Active transport is osmosis, but passive is exocytosis.

Tags

NGSS.HS-LS2-3

Limp (wilted) celery sticks are placed into a container of water. After some time in the water the celery sticks become firm again. Why does this occur?

• Photosynthesis in the celery cells produces water

• Water moves by osmosis into the celery cells

• Water moves by osmosis out of the celery cells

• Cellular respiration in the celery cells produces water

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What process is represented in the diagram?

• Osmosis

• Active transport

• Sodium-Potassium pump

• simple diffusion

When animal cells are exposed to high concentrations of water, they can burst. However, plant cells exposed to the same high concentration of water rare burst. Why is this so?

• Plant cells have cell membranes that prevent the cell from bursting

• Animal cells absorb more water than plant cells.

• Plant cells have cell walls that prevent the cell from bursting

• Animal cells have more permeable cell membranes than plant cells

Sea water is dangerous to drink because

• one cup of sea water contains enough sodium to poison you

• sea water is hypertonic to your body tissues and drinking it will cause you to lose water by osmosis

• sea water is isotonic to your body fluids and you will absorb too much water, causing your cells to burst.

• the salt causes hypertension and you will promptly die of a stroke.

If cells are placed in a strong sugar solution such as corn syrup, water will _____.

• pass from the sugar solution to the cells

• pass from the cells to the sugar solution

• stay in the cell

• pass back and forth

Tags

NGSS.MS-LS2-3

The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?

• carbohydrates

• lipids

• nucleic acid

• proteins

Tags

NGSS.MS-LS1-2

Diffusion is a form of __________ transport.

• Passive

• Active

• Easy

• Free

Passive Transport uses ____ energy

• no

• a lot of

• a little bit of

• some