Human Anatomy and Physiology Concepts

Front

What happens when a calcium ion binds to troponin?

Back

Tropomyosin moves out of the groove between the actin molecules, allowing muscle contraction.

Front

Which vitamin is synthesized by epidermal cells when exposed to sunlight?

Back

Vitamin D3.

Front

What are joints that allow only a little movement called?

Back

Amphiarthroses.

Front

What is the correct order of complexity from smallest to largest?

Back

Molecules, organelles, cells, tissues, organs.

Front

What is an atom that has lost or gained electrons called?

Back

An ion.

Front

What is the role of troponin in muscle contraction?

Back

Troponin binds calcium ions, causing tropomyosin to move and expose active sites on actin.

Front

What is the function of vitamin D3 in the body?

Back

It helps regulate calcium and phosphate in the body, promoting healthy bone formation.

Front

What type of joint allows for free movement?

Back

Diarthroses.

Front

What are the four main types of tissues in the human body?

Back

Epithelial, connective, muscle, and nervous tissue.

Front

What is the basic unit of life?

Back

The cell.