Exam 5: Cell Structure

Which type of cell connection joins heart muscle cells?

The major direct cell connections are tight junctions, gap junctions, and desmosomes.

Which of the following is not a function of the integral membrane proteins?

An organelle called a vault, composed of RNA and protein, functions to shuttle molecules to and from the nucleus.

Match each term to the phrase that describes it best. -Cell extension that is found on the sperm cell

Explain the structure and function of the primary cilium in the cell. Which cell type does not have a primary cilium?

The fundamental organizational unit of life is the:

Generally, the more active a cell is, the fewer mitochondria it will contain.

The presence of which substance in the cell membrane keeps it from breaking too easily?

Small protein structures called molecular motors pull loads from one part of the cell to another along the cytoskeleton.

The proteasomes contain enzymes that assist in protein synthesis.

Match each cell structure with its corresponding description or function. -Structures that destroy improperly folded protein molecules that could possibly harm the cell

Match each term to the phrase that describes it best. -Cell connection that forms a "collar" around groups of cells

Cell connections called desmosomes are like Velcro holding cells together.

Muscular dystrophy is a disease condition that can be linked to the malfunctioning of proteasomes.

Which cell fiber serves as part of our "cellular muscles?"

One function of the smooth endoplasmic reticulum is to help maintain a low Ca⁺⁺ concentration in the cell's interior.

Match each cell structure with its corresponding description or function. -Outer boundary of the cell made up of phospholipids and proteins

The outer portion of the cell membrane is hydrophobic, or water loving.

An area of cytoplasm that coordinates the building and breaking of microtubules is called: