UNIT 3 Cells & Transport

An area with a higher concentration of particles is described as.....

• low concentration
• high concentration
• diffusion
• osmosis

Diffusion is the movement of .... 

• water from low concentration  to high concentration
• particles from low concentration to high concentration
• water from an area of high concentration to low concentration
• particles from an area of high concentration to low concentration

Which of the following terms means the movement of water from an area of high concentration to an area of low concentration.

• diffusion
• prokaryotes
• osmosis
• concentration

Large molecules and ions can easily pass through the cell membrane without any help.

• true- they pass right through

• false- they need a protein channel or participate in active transport

Which way would the molecules move through the semi-permeable membrane?

• From the  A side  to the B-side
• From the B side to the A side
• none of the purple molecules would move

Which transport does not require energy?

• Passive
• Active 

Which is true about active transport?

• It requires energy
• it does not require energy
• It moves substances down the concentration gradient
• it moves material from high to low concentration

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

Which of the following substances passes through the plasma membrane   through the process of osmosis?

• glucose
• water
• protein
• sodium

Which of the following does not have a cell wall?

• animal cells
• bacteria cells
• plant cells
• fungi