Passive transport

The process of osmosis is best illustrated by the movement of:

• water into root hair cells

• oxygen into red blood cells

• carbon dioxide through stomates

• glucose through phloem

Tags

NGSS.MS-LS2-3

Which structure, composed mainly of proteins and lipids, aids in maintaining homeostasis in a cell?

• chromosome

• centrosome

• cell membrane

• nucleolus

Tags

NGSS.HS-LS1-3

Which process does not require the use of cellular energy to transport materials into or out of a cell?

• cellular respiration

• active transport

• passive transport

• vacuole

What is diffusion?

• when molecules move from a low concentration to a high concentration 
• when molecules move from a high concentration to a low concentration.
• no movement 
• molecules move everywhere

What is equilibrium?

• a large  amount of substance on  side of the cell and a small amount on the other side
• a small  amount of substance on  side of the cell and a large amount on the otherside
• equal amount of substance on either side of the membrane  
• no particles on either side of the a cell membrane

Cell membranes are described as selectively permeable.

Four students were asked to explain what this means. Which one is correct?

• Student 1: Cell membranes prevent all materials from entering the cell.

• Student 2: Cell membranes only provide structural support for the cell.

• Student 3: Cell membranes regulate which substances can enter and exit the cell.

• Student 4: Cell membranes allow all substances to enter the cell.