Homeostatic Control (E1)

Question 1

How did American physiologist Walter Cannon describe homeostasis?

Answer 1

He described it as the “maintenance of nearly constant conditions in the internal environment.”

Question 2

How is disease classified in relation to homeostasis?

Answer 2

Disease is considered a disruption of homeostasis

Question 3

What is the function of the control center?

Answer 3

To receive and process information from the receptor

Question 4

What is the function of the receptor?

Answer 4

To receive information that something in the environment is changing

Question 4

What is the function of the effector?

Answer 4

To respond to the commands of the control center by either opposing (i.e., negative feedback) or enhancing (i.e., positive feedback) the stimulus

Question 5

Explain body temp regulation (i.e., negative feedback) in terms of receptor, control center, and effector.

Answer 5

Receptor - in response to cold temps, arrector pili muscles contract, causing goosebumps

Control center - hypothalamus recognizes cold temps/drop in body temp and initiates response to combat them

Effector - body starts shivering to maintain body heat