Exam 5: Cell Membranes and Signaling

If a drop of red ink is placed in one end of a shallow pan filled with water,and a drop of green ink is placed in the other end,which of the following will be true at equilibrium?

Membrane proteins covalently bonded to carbohydrates are called _______.

Integral membrane proteins that extend all the way through the bilayer and have both ends exposed are called _______ proteins.

When placed in a hypertonic solution,animal cells

Which enzyme converts cAMP back to AMP?

In biological membranes,the phospholipids are arranged in a _______,with the _______.

If a red blood cell is placed in an isotonic solution,it will

Which of the following is the driving force for simple diffusion?

The two sides of a membrane can be split apart from each other by an experimental technique known as freeze-fracturing.When one side of a freeze-fractured membrane is examined under the electron microscope,the exposed interior of the membrane bilayer appears to be covered with bumps.These bumps are most likely

Which of the following is the driving force for active transport?

If you were designing a drug with an intracellular target,which type of transport system would you want to include in your design as the most efficient way to deliver the drug?

Which statement about ligands and receptors is true?

Osmosis

Chemical signals reaching a cell deep inside a multicellular organism may come from

Which molecule has an ion channel receptor?

In the intestine,Na⁺ and an amino acid bind to the same transport protein that moves the two substances in the same direction.This is an example of

Phagocytosis refers to

Most of the lipids that make up biological membranes are called _______.

Which of the following would likely not be observed in a person injected with epinephrine?

Signals that travel to distant cells through the circulatory system are known as