Cell Transport & levels of organization

In passive transport, molecules move from an area of __________ concentration to an area of __________ concentraiton

• high, low

• low, high

• water, salt

• active, passive

Which of the following is not a type of passive transport?

• osmosis

• Diffusion

• Endocytosis

• facilitated diffusion

_______ regulates what enters and leaves a cell.  

• Cell Membrane

• Nucleus

• Mitochondria

• Cytoplasm

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 water and water-soluble substances to enter the cell.

When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of

• Osmosis

• Diffusion

• Transportation

• Homeostasis

Which cell is placed into a hypotonic environment? 

• A

• B

• C

• D

An animal cell placed in a hypertonic (salty) solution will

• Stay the same

• Shrink- get smaller

• Swell- get bigger

What is the difference between active and passive transport?

• Active does not need energy and passive uses ATP (energy)

• Active uses ATP (energy) and passive does not need energy

• Active stores transport proteins and passive releases 

• Active uses hormones and passive does not 

Moving from areas of LOW concentration to areas of HIGH concentration is called?

• Passive Transport

• Active Transport

• Diffusion

• Osmosis

Movement across the cell membrane that requires no energy and goes from higher to lower concentration is called:

• active transport

• passive transport

• hydrolysis

• dehydration synthesis