Cell Junctions Review

What structures make up muscle cells?

Myofibrils

What filaments make up myofibrils?

Actin and Myosin

How does moving an arm or leg occur via muscle cells?

They contract and expand together

How do bone cells form bones?

They secrete calcium and other materials that harden

What are cell junctions?

Structures that connect cells to each other

In what tissue are cell junctions most commonly found?

Epithelial

What kind of junction is depicted?

Tight Junction

What kind of junction is depicted?

Desmosome

What kind of junction is depicted?

Gap Junction

What sorts of molecules can pass through a tight junction?

Nothing

Where can we find tight junctions?

Bladder, Intestines, and Kidney’s

Where do desmosomes attach at?

The cytoskeleton

What sorts of molecules can pass through a desmosome?

Water and Ions

Where can we find desmosomes?

Skin and Intestines

What do gap junctions allow to occur?

The passing of water and ions between cells 

Where can we find gap junctions?

Cardiac Muscles and Neurons

What are the four tissue types found in animals?

Epithelial, Connective, Muscle, and Nerve

What is the function of epithelial tissue?

Covers and lines body surface, provides protection

What is the function of connective tissue?

Provides structural support and connects other tissues

What is the function of muscle tissue?

Contracts to enable movement

What is the function of nervous tissue?

Transmits electrical impulses

Which of the following organelles often occupies the majority of the volume of a plant cell?

Central Vacuole