Cornell Notes 14

Question 1

what is homeostasis

Answer 1

Homeostasis: the maintenance of stable internal conditions despite changes in the outside environment

Question 2

how does your body regulate your body temp.

Answer 2

If your body temperature begins to get too low- your nervous system will send signals to other body systems to help raise it back up:
- Your skin (integumentary system) might develop goosebumps
- Your muscles may shiver
- You may start moving large muscle groups (like bouncing or rubbing your arms to keep warm).

Question 3

how does your body help keep your balance

Answer 3

Structures in your inner ear sense the position of your head
- This information gets sent to your brain
- If the brain senses that you are losing your balance, it will send a message to your muscles to move in a way to keep you steady

Question 4

Describe what happens in the body when the body needs more energy

Answer 4

When your cells need more energy, hormones will signal to the nervous system to make you feel hungry
When you have consumed enough glucose to replenish your cells, other hormones will signal to your nervous system to make you feel full

Question 5

Why does your body need water?

Answer 5

All chemical reactions take place in the watery environment of your cells

Question 6

How do different body system help make sure you get water when you need it?

Answer 6

if your body needs water, your nervous system will cause you to feel thirsty

Question 7

Define stress

Answer 7

Stress: the reaction of a person’s body to potentially threatening, challenging or disturbing events

Question 8

Does everyone experience stress the same way?

Answer 8

Each person experiences stress differently

Question 9

Why is ongoing stress problematic?

Answer 9

Ongoing stress: can disturb homeostasis and weaken the body’s ability to fight disease
Can also cause a wide array of health issues

Question 10

Why can germs be problematic?

Answer 10

Germs (viruses and bacteria): cause disease can disrupt homeostasis and make you sick

Question 11

Explain how the immune system fights germs/ diseases.

Answer 11

make you sick
The immune system includes specialized cells (like white blood cells) that attack and destroy germs
Fighting infections this way can sometimes cause your body temp. to increase and your energy levels decrease