The Principles of Homeostasis (chapter 1 of homeostasis)

Question 1

Homeostasis

Answer 1

The maintenance of a stable equilibrium in the conditions inside the body

Question 2

What maintain homeostasis?

Answer 2

• Receptors - detect changes in internal and external environments
• Effectors - muscles or glands that react to the motor stimulus to bring about a change in response to a stimulus

Question 3

What is done with the information from sensory receptors?

Answer 3

The information is transmitted to the brain and impulses are sent along the motor neurones to the effectors to bring about changes to restore the equilibrium in the body

Question 4

Feedback systems

Answer 4

• Homeostasis depends on sensory receptors detecting small changes in the body, and effectors working to restore the status quo
• These precise control mechanisms in the body are based on feedback systems that enable the maintenance of a relatively steady state around a narrow range of conditions

Question 5

Negative feedback systems

Answer 5

1. A small change in one direction is detected by sensory receptors
2. Effectors work to reverse the change and restore conditions to their base level

Question 6

Positive feedback systems

Answer 6

1. A change in the internal environment of the body is detected by sensory receptors
2. Effectors are stimulated to reinforce that change and increase the response