Exam 5: Membrane Dynamics

The membrane proteins that change shape and bind with specific molecules to transport them across the cell membrane are ________.

Match the transport process to its description. -the movement of molecules via proteins embedded in the cell membrane; requires ATP

Match the type of transport with its description. -in one side of a cell and out the other

Which membrane transport process(es)is/are abnormal in people with cystic fibrosis? What is the consequence of the abnormal transport? Which organ systems are affected? How is this disease treated? How long do cystic fibrosis patients normally live? What are some of the possible causes of death related to this disease? What is the cause of cystic fibrosis?

When the ions move across the cell membrane,an electrical potential change results.As you are probably aware,nerves trigger muscle movement.When you place your finger on a sharp object (such as a tack),you quickly draw your hand away and develop a sensation of pain.Which types of channels are operating under these conditions to allow nerve conduction and subsequent muscle movement?

Facilitated diffusion and active transport differ in that

A patient is given an intravenous infusion of glucose solution that has a concentration of 25 grams of glucose per liter.If the infusion is given at a rate of 4 milliliters per minute,what is the mass flow of glucose into the body?

A cell membrane that is selectively permeable

As the charge on the membrane of a typical neuron approaches 0 from -70 mV,the cell is

How does the beta cell in the pancreas react to release insulin when glucose levels are low?

Explain and distinguish between the following: A.chemical reaction equilibrium B.chemical equilibrium C.osmotic equilibrium

When the kidney goes into failure,one of the signs that doctors will see is that red blood cells will crenate (shrivel up).Why does this happen in kidney failure? What process is occurring to the blood cells?

The Na⁺-K⁺-ATPase pumps (this number of)________ Na⁺ ions ________ (into/out of)the cell and (this number of)________ K⁺ ions ________ (into/out of)the cell.

Pinocytosis and potocytosis are types of

Anions will ________ each other.

Match the terms to changes presented,assuming a resting membrane potential of -70 mV.Answers may be used once,more than once,or not at all. -to -50 mV from resting potential

If someone has a muscle cramp or spasm,a commonly discussed treatment is to consume a banana (or another food high in potassium).Why would this be a possible treatment for muscle cramps or spasms?

Which of the following is a unique characteristic of glucose as a solute in biological systems?

Match the type of transport with its description. -movement from the extracellular fluid into the lumen of an organ

Which of the following would increase the rate of diffusion across a cell membrane?