Biology OER Review Midterm lecture Chapter 5-8

CHAPTER 5: Channels, carriers and pumps are all examples of

• Osmosis

• Transporter proteins

• Adhesion proteins

• Receptor proteins

The cell's plasma membrane mediates which of the following is NOT transactions with the environment?

• Passing messages to other cells

• Directing synthesis of various food-digesting proteins

• Ingesting food molecules and sometimes entire cells

• Responding to a host of chemical cues

Osmosis is the diffusion of water across a membrane in response to the concentration of one or more of the ______.

• cells

• solutes

• compartments

• membranes

A macrophage engulfing a bacterium is an example of

• Phagocytosis

• active transport

  active transport

• Chemocytosis

• Exocytosis

The movement of molecules from an area of high concentration to an area of low concentration is

• Osmosis

• active transport

• Diffusion

• Solubility

Tags

NGSS.MS-LS2-3

A cell is placed in an hypotonic solution. Which way will the water move?

• in and out the cell

• out of the cell

• into the cell

• neither in or out

Tags

NGSS.HS-LS1-3

What type of transport protein can move 2 different molecules in the same direction?

• multi porter

• antiporter

• symporter

• monosymporter

In a single sodium-potassium pump cycle, ATP is used with the result that

• 2 sodium ion enters and 1 potassium ion leaves.

• 3 sodium ions leave and 2 potassium ions enter.

• sodium and potassium ions enter and water leaves.

• 2 sodium ion leaves and 1 potassium ion enters.

Membrane fluidity is affected by

• types of fatty acids, waters affinity for hydrogen bonding.

• temperature, cholesterol, types of fatty acids

• hyrophillic tails, hydrophobic heads, cholesterol.

• size of molecules, polarity of molecules, temperature.

specific molecules are taken in after they bind to a receptor is known as pinocytosis

• false

• true