A&P I Unit 1 Review

Front

What is an isotonic solution?

Back

An isotonic solution is a solution in which the concentration of solutes is equal inside and outside the cell, resulting in no net gain or loss of water.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the most abundant substance in the human body?

Back

Water is the most abundant substance in the human body, making up about 60% of body weight.

Front

What is the function of the cell (plasma) membrane?

Back

The cell (plasma) membrane maintains cell integrity and controls the entry and exit of substances.

Front

What is the visceral layer of the serous membrane?

Back

The visceral layer of the serous membrane is the layer that directly covers and adheres to the organs.

Front

What is the difference between isotonic, hypertonic, and hypotonic solutions?

Back

Isotonic solutions have equal solute concentrations, hypertonic solutions have a higher solute concentration outside the cell causing it to shrink, and hypotonic solutions have a lower solute concentration outside the cell causing it to swell.

Front

What role does water play in the body?

Back

Water serves as a solvent, regulates body temperature, transports nutrients, and is essential for biochemical reactions.

Front

How does the cell membrane contribute to homeostasis?

Back

The cell membrane regulates the movement of substances in and out of the cell, helping to maintain a stable internal environment.

Front

What are the components of the cell membrane?

Back

The cell membrane is primarily composed of a phospholipid bilayer, proteins, cholesterol, and carbohydrates.

Front

What is the significance of the serous membrane?

Back

The serous membrane reduces friction between organs and provides a lubricated surface for movement.