Active and Passive Transport Exam

What is cellular transport?

• The process of building cellular towers
• Movement of materials across the cell membrane
• The movement of cells within the body
• The transportation of people using cell phones

A selectively-permeable membrane is a membrane that allows _________________ substances and molecules to pass into or leave the cell.

• only some
• all

Diffusion is a form of

• active transport
• passive transport
• endocytosis
• exocytosis

With passive transport, a substance diffuses ______________the concentration gradient across a membrane.

• up
• down

Examples of diffusion include:

• being able to smell baked cookies in the oven several feet away
• when you become thirsty after eating salty Takis Chips
• when you dip a teabag into water and the water changes color
• all of the choices above

Which city has a higher concentration of people living in a square mile radius?

• New York City
• Wyandanch

With active transport, molecules move from an area of

• high concentration to an area of low concentration
• low concentration to an area of high concentration

Active transport

• requires energy
• requires no energy

6. In osmosis, water moves:

• from an area of lower concentration to an area of higher concentration
• from an area of high concentration to an area of lower concentration
• between areas of equal concentration
• all of the above

Osmosis is a form of active transport

• True
• False