The cavity of the body immediately inferior to the diaphragm is the ________ cavity.

In an x-ray film of the skeletal system, the dense tissue areas appear ________ because they ________ the x-rays; and the less dense tissues appear ________ because they ________ the x-rays.

When a sperm cell comes into contact with an egg cell, there is a change in the electrical charge across the plasma membrane and various channel proteins close. These channels would be called

Which of the following chemical reactions best represents the decomposition of ATP?

What type of attachment proteins attach cells to extracellular molecules?

The fluid-mosaic model of the plasma membrane suggests that

The molecule used most frequently by cells as a fuel belongs to which of the following groups?

An electrolyte is

Isotopes of the same element have

The innermost serous membrane attached to the heart muscle is called the: