Cell Transport Part 1

A cell membrane is described as selectively permeable. What does this mean?

• it is made of lipids

• it allows all molecules to pass through

• it only allow certain molecules to pass while keeping others out

• flexible

Which type of membrane transport requires energy?

• passive transport

• active transport

Which type of membrane transport do NOT require energy?

• passive transport

• active transport

Passive transport moves particles (solute) from areas of _______ concentration to areas of ________ concentration

• HIGH to LOW concentration

• LOW to HIGH concentration

Which of the following is an example of passive transport?

• diffusion

• osmosis

• facilitated diffusion

• all of the above

What type of passive transport uses a protein channel?

• osmosis

• endocytosis

• active transport

• facilitated diffusion

Moves small molecules like O₂ and CO₂ directly between the phospholipids how?

• simple diffusion

• active transport

• endocytosis

• osmosis

The diagram below represents a plant cell with three structures labeled X, Y, and Z. Identify structure Y and describe its main function.

• cell wall, regulate what enters and leaves cell

• cell wall, maintain cell structure

• cell membrane, regulate what enters and leaves cell

• chloroplast, create glucose from CO2 and sunlight

Tags

NGSS.MS-LS1-2

The cell membrane is also called a "lipid bilayer" because it

• has two layers of phosphoLIPIDs

• has two layers of DNA

• has one layer of phospholipids

• one layer of glucose