1. Unit 12: Human Regulation and Reproduction
Assignment 2: The Nervous and Endocrine Systems

2. Lesson Objectives To understand the process of glucoregulation
Be able to describe the flight or fight response and explain the reactions of this response.

3. Regulating Glucose:

4. Glucoregulation
Now you have researched this process, you should be able to answer some questions on it.
Complete the worksheet…
You have 15 minutes …

6. Fight or Flight:
What do you understand about the fight or flight response in mammals?
Write a few sentences to describe what you think it is…

7. Fight or Flight

8. For each physiological response, explain why it is helpful in a stressful situation:
Circulation increases blood supply to brain, muscles and to limbs (more O2).
Brain activity changes: we think less and react more instinctively.
Heart beats faster and harder – coronary arteries dilate.
Blood pressure rises.
Lungs take in more O2 and release more CO2.
Liver releases extra sugar for energy.
Muscles tense.
Sweating increases.
Adrenal glands release adrenalin.

9. Sympathetic system
Those responses were all examples of increasing activity in the body through the Sympathetic Nervous System
The following slide lists responses coordinated by the parasympathetic system which are examples of decreased activity:

10. Parasympathetic
Digestion slows down or stops – stomach and small intestines reduce activity. We might feel sick, or be sick.
Mouth does dry – constriction of blood vessels in salivary glands.
Kidney, large intestine and bladder slow down. We often feel we want to go to the toilet: this is the body’s way of “lightening the load”
Immune responses decrease.

11. Fight or flight:

12. Crash Course:

13. Assignment 2: Launch Date: Friday 6th March 2015
Hand In date: Friday 20th March 2015
The distinction test will be at 9:00am on Friday 20th March.