Homeostasis

Front

What is Homeostasis?

Back

Homeostasis is the maintenance of a relatively stable internal environment in an organism, often incorporating feedback regulation.

Front

What happens to blood cells when a person drinks very large amounts of water?

Back

Drinking very large amounts of water can cause a person's blood cells to burst due to osmotic pressure.

Front

Why does pulse rate increase during exercise?

Back

Pulse rate increases during exercise because gas exchange must happen more quickly than when a person is at rest.

Front

Which of the following is NOT an example of homeostasis? A human producing gametes, A plant bending toward sunlight, A bird drinking water when thirsty, A dog stealing chicken off the kitchen counter when hungry?

Back

A human producing gametes is NOT an example of homeostasis.

Front

Why is the sensation of thirst important for homeostasis?

Back

The sensation of thirst is important for homeostasis because water removed by the kidneys must be replaced.

Front

What role does feedback regulation play in homeostasis?

Back

Feedback regulation helps maintain homeostasis by adjusting physiological processes in response to changes in the internal environment.

Front

What is an example of a feedback mechanism in the human body?

Back

An example of a feedback mechanism is the regulation of body temperature through sweating or shivering.

Front

How do plants maintain homeostasis?

Back

Plants maintain homeostasis by regulating water loss through transpiration and adjusting their growth towards light.

Front

What is the significance of gas exchange in maintaining homeostasis?

Back

Gas exchange is significant for maintaining homeostasis as it ensures that oxygen is delivered to cells and carbon dioxide is removed.

Front

What is osmotic pressure?

Back

Osmotic pressure is the pressure required to prevent the flow of water across a semipermeable membrane, crucial for maintaining cell integrity.