Exam 6: Cell Membranes, Transport, and Communication

After a steroid hormone enters a target cell it

You observe a cell in a solution swelling until it bursts. You have seen an instance of osmosis in

The various connections between cells including cell junctions and signaling molecules allow the cells in a multi-cellular organism to "talk" to each other, a principle known as cell-to-cell _______.

Channel proteins require energy for transporting molecules across the plasma membrane

Receptors in target cells can be located in the plasma membrane, the cytosol, or the __________.

Cells in our liver take up cholesterol by receptor-mediated _____________.

All steroid hormones are derived from

After entering its target cell, a hormone binds to its receptor and interacts with the cell's DNA, resulting in the production of a specific _______.

The arrows in the figure below show the movement of water in relation to a plant cell. For water to move in the direction indicated, _________ solution must surround the cell.

Soon after a certain molecule enters a cell, the cell begins producing a new type of protein. The molecule was probably a

The fragrance of bread baking in a kitchen spreads to other rooms by

Active transport requires

A white blood cell at the site of a puncture wound engulfs a large cluster of bacteria forming a large internal vesicle. This is an example of

A given signaling molecule can bind to several different kinds of cell surface receptors.

Osmosis

Signaling molecules can be "tagged" by attaching glow-in-the-dark molecules to them. After adding tagged signaling molecules to the fluid around several cells, you observe the cells with a microscope designed to see glow-in-the-dark molecules. After a few minutes, you notice that the plasma membranes of some of the cells begins to glow. This observation indicates that some cells

The principle of cell _______ is that different cells in the same organism may have different functions.

The proposed role of capsaicin in anesthesia during surgery is to

Hydrophilic signaling molecules

_____________ junctions act as protein "hooks" between cells in heart muscle.