Homeostasis lesson 3

Match the following

• Neurotransmitter

• Chemical messenger released by neurons.

• Hormone

• Chemical responsible for controlling and regulating the activities of certain cells and organs.

• Nervous system

• Command system of the body; brain, spinal cord and nerves.

• Endocrine system

• The glands and organs that make hormones.

These detect or identify changes or variations on the inside or outside of your body.

• Effectors

• Receptors

• Response

• Stimuli

These detect or identify changes or variations on the internal environment of your body

• Effectors

• Receptors

• Response

• Stimuli

Give an example of homeostasis in regard to the human body.

Blood glucose levels increase and insulin returns this back to normal levels is an example of ...

• Positive feedback

• Negative feedback

During a fever, the body temperature continues to increase away from the set body temperature. This is an example of ...

• Positive feedback

• Negative feedback

When your body temperature decreases, thyroxine acts to increase your metabolism and increase your body temperature. This is an example of ...

• Positive feedback

• Negative feedback

The stimulus-response model describes how ​​ (a)   , such as changes in the internal environment of your body, are detected by ​ (b)   , which may communicate the message to ​ (c)   to bring about some kind of ​ (d)   so that conditions are brought back to normal.

• stimuli
• receptors
• effectors
• response

Give an example of a negative feedback mechanism in the human body.

Distinguish between negative and positive feedback.