Exam 4: Membrane Structure and Function

Certain individuals with a Y chromosome develop into females because testosterone is not able to induce the formation of male sexual characteristics.This is most likely due to a defect in

Our body recognizes the foreign nature of a parasite or disease agent and we soon build up antibodies.A few parasites can change their identity to evade our immune system.How could cells do this on a regular basis?

The same signaling molecule that binds to the receptor on the outside of the cell is used to alter gene expression in the nucleus.

Radioactive isotopes are used to tag proteins in the cell membranes of mouse cells.These cells are then fused with human cells in cultures.What is the likely consequence of the tagged mouse proteins?

Which intercellular junction allows for the rapid movement of small molecules or ions to flow from one animal cell to the next?

When blood supplies oxygen and food to a cell surface and these molecules diffuse across,we might expect some "resting time." However,if we inspected most cell membranes in a living human body,we would find a nearly continuous flow of substances back-and-forth across the plasma membrane.Which of the following is not a reason why?

Which type of membrane protein will be used to bind to hormones?

When you cut into most active plant tissue,water appears almost immediately because plant cells are in

If a cell lacks ATP,which of the following processes would cease to operate immediately?

A membrane sac filled with large molecules of potassium is suspended in a beaker of water.What will happen?

When a plant cell is placed in a hypotonic solution,the cell wall prevents

Dead plants seen alongside a salted roadway died because the saline solution caused the cells to

The pressure that is generated when water flows through a differentially permeable membrane is termed

One way to determine whether something is being actively transported across a membrane,is to compare its rate of transport with and without a chemical that blocks ATP production.

If a particular molecule is brought into the cell by receptor-medicated endocytosis,then changing the receptors will change the molecule that is being transported.

Which components of a cell membrane are used for cell-to-cell recognition?

When a substance moves from an area of low concentration to an area of high concentration while using energy,the process is termed

Which component of the extracellualr matrix is responsible for forming proteoglycans?

What will happen to the water level in Figure 4.1?

Which is the most common type of intercellular junction between skin cells?