Cells Test 1 Homeostasis

Front

What is homeostasis?

Back

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

Front

Why is homeostasis important for living organisms?

Back

Homeostasis is crucial because it allows organisms to function optimally, ensuring that conditions such as temperature, pH, and hydration levels remain within a suitable range.

Front

What are some examples of homeostasis in the human body?

Back

Examples include temperature regulation (sweating or shivering), blood sugar regulation (insulin and glucagon), and maintaining fluid balance (thirst response).

Front

What is the role of the cell membrane in homeostasis?

Back

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

Front

What is negative feedback in homeostasis?

Back

Negative feedback is a mechanism that counteracts a change in a physiological variable, helping to return it to its set point.

Front

What is positive feedback in homeostasis?

Back

Positive feedback amplifies a change in a physiological variable, moving it away from its set point, often leading to a specific outcome (e.g., childbirth).

Front

How do kidneys contribute to homeostasis?

Back

Kidneys help maintain homeostasis by regulating water balance, electrolyte levels, and removing waste products from the blood.

Front

What is thermoregulation?

Back

Thermoregulation is the process by which the body maintains its internal temperature within a narrow range, despite external temperature changes.

Front

What is osmoregulation?

Back

Osmoregulation is the process of maintaining the proper balance of water and electrolytes in the body.

Front

What is the significance of blood pH in homeostasis?

Back

Maintaining blood pH within a narrow range (around 7.4) is vital for proper enzyme function and overall metabolic processes.