Human Anatomy and Physiology - Homeostasis - Quiz

What is the definition of homeostasis?

• Ability to change internal conditions continuously

• Ability to maintain unstable internal conditions

• Ability to maintain relatively stable internal conditions

• Ability to maintain external conditions

Answer explanation

Homeostasis is the ability to maintain relatively stable internal conditions.

What are the components of homeostatic control of variables?

• Receptor, control center, and sensor

• Control center, sensor, and effector

• Receptor, sensor, and effector

• Receptor, control center, and effector

Answer explanation

The components of homeostatic control of variables are receptor, control center, and effector. These components work together to maintain a stable internal environment.

What is the most-used feedback mechanism in the human body?

• Positive feedback

• Negative feedback

• Neutral feedback

• Reactive feedback

Answer explanation

Negative feedback is the most-used feedback mechanism in the human body. It helps maintain homeostasis by reversing any deviation from the set point.

Which of the following is an example of negative feedback?

• Regulation of body temperature

• All of the above

• Regulation of blood glucose by insulin

• Control of room temperature by a domestic boiler

Answer explanation

Negative feedback is exemplified by the regulation of body temperature, blood glucose by insulin, and control of room temperature by a domestic boiler. All of the above choices demonstrate a mechanism that counteracts or reverses a change, maintaining stability.

What happens to the response in a biological system when positive feedback is applied to the stimulus?

• Stops the stimulus

• Negates the stimulus

• Enhances or exaggerates the stimulus

• Reverses the stimulus

Answer explanation

Positive feedback enhances or exaggerates the stimulus in a biological system.

What happens when homeostasis is disrupted?

• It has no impact on the body

• It enhances homeostasis

• It improves overall health

• It raises disease risk and is linked to aging-related changes

Answer explanation

Disruption of homeostasis raises disease risk and is linked to aging-related changes.

What is the approximate percentage of water in an average adult's body weight?

• 60%

• 50%

• 70%

• 40%

Answer explanation

The approximate percentage of water in an average adult's body weight is 60%. This is the correct choice.

Where can the extracellular fluid be found in the body during a medical examination by a Nursing student?

• Inside the cells

• In the blood vessels

• In the interstitial spaces

• Outside the cells

Answer explanation

Extracellular fluid is found outside the cells in the interstitial spaces.

What does the brain signal when a person becomes dehydrated?

• Fatigue

• Thirst

• Pain

• Hunger

Answer explanation

When a person becomes dehydrated, the brain signals thirst as a response to the lack of water in the body.

How much fluid do healthy adults typically consume per day?

• 2500ml

• 1500ml

• 2000ml

• 2200ml

Answer explanation

Healthy adults typically consume 2200ml of fluid per day.