Passive Transport

When the number of water molecules outside of the cell is greater than inside the cell, which will most likely occur?

• Molecules of water will NOT MOVE either way.

• Molecules of water will move OUT of the cell.

• Molecules of water will move INTO the cell.

• Molecules of water will EVAPORATE.

Tags

NGSS.MS-LS1-2

A cell that is unable to import substances required to process chemical energy is most likely a result of a malfunctioning of the ____________________.

• cell membrane

• golgi body

• endoplasmic reticulum

• nuclear envelope

Tags

NGSS.MS-LS1-2

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.

Tags

NGSS.MS-LS1-2

Which part of the cell controls the movement of substances?

• mitochondria

• cell membrane

• chloroplast

• nucleus

The thin, semi-permeable membrane that encloses a cell allows nutrients to enter and wastes to be ____________________.

• digested

• recycled

• protected

• removed

Tags

NGSS.MS-LS1-2

All of the following are functions of a cell membrane EXCEPT

• surrounding and protecting the contents of the cell.

• releasing waste products from the cell.

• producing energy for the cell processes.

• allowing gases to enter the cell.

Tags

NGSS.MS-LS1-2

Why are water molecules able to enter the egg but NOT the sugar molecules?

• Sugar molecules are too heavy.

• The holes of the semi-permeable membrane were too small to let sugar molecules through.

• Semi-permeable membranes need energy.

• Semi-permeable membranes must be under pressure to work.

Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?

• A cell membrane is surrounded by fluid.

• A cell membrane is semi-permeable.

• A cell membrane holds organelles in place.

• A cell membrane is found in plant and animal cells.

Capillary walls are only one layer of cells thick. Passage of oxygen into and out of the capillaries is controlled most by which process?

• collection of waste material

• breakdown of materials

• diffusion of materials

• storage of materials

Tags

NGSS.MS-LS2-3

The processes of diffusion AND active transport are both used to...

• break down molecules to release energy

• move molecules into or out of cells of the body

• bring molecules into cells ONLY when they are more concentrated outside of the cell

• move molecules ONLY against a concentration gradient, using ATP molecules

Tags

NGSS.MS-LS2-3