Exam 2: The Celt Basic Unit of Structure and Function

_______________ transport is required to move a substance across a membrane against a concentration gradient.

The process of "programmed cell death" is called

Mitochondria are responsible for the synthesis of most of the energy-rich ATP molecules used by human cells.

Metaplasia is the abnormal transformation of a fully differentiated adult tissue into a differentiated tissue of another kind.

Which of these is considered a "gatekeeper" that regulates the passage of materials in or out of the cell?

_____________ is the division of the cytoplasm during cell division.

Organelles that are always in direct contact with the cytosol are called non-membrane-bound organelles.

Which of the following shows the correct sequence of mitosis?

The uptake of cholesterol into cells is an example of

Often,a cell's functions are reflected in either its size or shape.

Functions of human body cells include

Human body cells have many functions,including

_____________ are short,membrane-attached projections containing microtubules that occur in large numbers on exposed membrane surfaces.

The microscope of choice for a detailed three-dimensional study of the surface of a specimen is the

In _____________ transport,substances move across a plasma membrane without the expenditure of energy by the cell.

Another name for the intracellular fluid is

During its mitotic phase a cell is

Materials tend to move less rapidly when their concentrations are significantly different between two compartments.

The production of sperm and oocytes is achieved through a cell division process called _____________.

Which of the following serve to increase the surface area of a cell for absorption and/or secretion?