Cell transport Mechanisms

Cell transport Mechanisms

by Coach wilson

Cell Transport

Cell Membrane

Cell transport involves the movement of molecules across the cell membrane. All cells have a membrane; for example,

Eukaryotes: animals, plants, fungi

Prokaryotes: bacteria, archaea

Video Segments

In this lesson you will watch video segments from the Amoeba Sisters' video, Cell Transport, and other short video segments. In addition you will answer questions. To play each video segment, click on the video preview.

Multiple Choice

The cell membrane is made of a

• DNA double helix

• phospholipid bilayer

• cellulose fiber framework

Multiple Select

Examples of molecules that are small enough to diffuse through the cell membrane using passive transport are (choose 3)

• water

• DNA

• oxygen

• carbon dioxide

• polysaccharide

Multiple Choice

Channels in the membrane for facilitated diffusion are formed by

• transport sugars

• transport lipids

• transport proteins

Multiple Choice

An important molecule that needs a transport protein to enter a cell is

• oxygen

• carbon dioxide

• glucose

Multiple Choice

The energy used for active transport in cells comes from

• ATP

• polysaccharides

• proteins

Multiple Choice

The process that can move molecules against the concentration gradient is

• active transport

• passive transport

Multiple Choice

Endocystosis is the process for moving materials

• into a cell

• out of a cell

Multiple Choice

Waste is moved out of cells through the process of

• phagocytosis

• exocytosis

• pinocytosis

Phagocytosis

Phagocytosis means "cell eating," and it is the process used by human immune cells to eat pathogens in the body. Unicellular organisms , such as amoebas, get their food through phagocytosis. Hear how to pronounce phagocytosis correctly in this next video.

Phagocytosis in the human immune system

In the next video you will see a white blood cell, called a neutrophil, chasing bacteria and eating them.

Multiple Choice

When the neutrophil eats bacteria, it is using

• active transport

• passive transport

Phagocytosis in unicellular organisms

In the next video you will see an amoeba eat a paramecium. The sound effects are just that -- those are not the real sounds of unicellular organisms.

Multiple Choice

The molecule that provides energy for the amoeba is

• DNA

• phospholipid

• ATP

Multiple Choice

The movement of particles from an area of high to low concentration is known as--

• Passive Transport

• Active Transport

Multiple Choice

What is it called when large molecules move across the cell membrane from an area of high concentration to an area of low concentration through a protein channel?

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

Multiple Choice

What is the name of the process in which small molecules move from an area of high concentration to an area of low concentration across the cell membrane

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

Multiple Choice

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 

Multiple Choice

The movement of molecules from low to high is known as

• simple diffusion

• facilitated diffusion

• active transport

• osmosis

Multiple Choice

ALL living cells have this in common

• Nucleus
• Cell Membrane
• Cell Wall
• Mitochondria

Multiple Choice

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

Multiple Choice

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

Multiple Choice

The concentration of water is higher in the soil than in plant root cells. Water moves into root cells of a plant by...

• Facilitated Diffusion
• Simple Diffusion
• Active Transport
• Osmosis

Multiple Choice

The cell below is in a _____________ solution.

• Hypertonic
• Hypotonic
• Isotonic

Multiple Choice

This egg has shrunk, what type of solution was it placed in?

• hypotonic solution
• hypertonic solution
• isotonic solution
• active transport

Multiple Choice

You put a cell into a solution, the cell grows. Is the solution hypotonic or hypertonic to the cell? 

• hypertonic
• hypotonic
• isotonic
• not enough information

Multiple Choice

What type of solution allows water to enter the plant cell?

• hypotonic solution
• hypertonic solution
• isotonic solution
• active transport

Multiple Choice

An ISOTONIC solution has a(n) ______________ concentration of solute (dissolved stuff) than inside the cell.

• lower
• equal
• higher

Multiple Choice

If a cell is placed in a HYPOTONIC solution, water will move _________ of the cell, causing it to ___________.

• into, swell
• out of, shrivel
• in and out of the cell, stay the same

Multiple Choice

What type of solution is this cell in?

• Isotonic
• Hypertonic
• Hypotonic
• diffused

Multiple Choice

What type of solution is this cell in?

• Isotonic
• Hypertonic
• Hypotonic
• diffused

Multiple Choice

What type of solution is this cell in?

• Isotonic
• Hypertonic
• Hypotonic
• diffused

Multiple Choice

Is it safe to drink salt water?

• Yum, so salty!

• No, you could die of dehydration.