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Homeostasis

EQ: Why do we get a fever when we are sick?

Open Ended

What kinds of things does your body do to get warm when it's cold outside?

Multiple Choice

What do you think homeostasis is?

• Keeping your body systems stable

• Staying at home

• Making body systems unstable

What is Homeostasis?

• Keeping internal body systems stable even during changes in the environment

• All organisms need specific conditions to function

• Our bodies naturally work to keep us stable and safe

Multiple Choice

What is the perfect internal body temperature for a person?

• 102 degrees F

• 98.2 degrees F

• 75 degrees F

When it Gets Cold...

• 1. Nervous system - Sends signals

• 2. Skin (integumentary system) - Creates goosebumps

• 3. Muscular System - Cause you to shiver

• All of this is to generate.....

• HEAT!!

Open Ended

What do you think your body does when you get too hot??

When you Need Energy...

• 1. Endocrine system - Sends hunger hormones

• 2. Nervous system - Makes you feel hungry

• 3. You eat, using muscular, skeletal, & digestive system

When your Body Needs H2O

• 1. Nervous system: Makes you thirsty

• 2. Skeletal + Muscular : Walk you to water

• 3. Nervous system: Makes you not thirsty

• 4. Digestive system & Circulatory: Get the water to where it is needed

Multiple Select

Which 2 body systems did you see in each scenario?

• Nervous system

• Muscular system

• Endocrine system

• Respiratory system

Multiple Choice

When your blood sugar is too high, what hormone is released?

• glucagon

• insulin

Open Ended

What can happen when homeostasis (a healthy balance in the body) is not maintained?

Compare and contrast negative and positive feedback loops

We will:

Understand the process of homeostasis in the human body

I will:

Today's Objectives

Homeostasis in Cells

THE CELL (or plasma) MEMBRANE!

• The cellular (or plasma) membrane is responsible for controlling substances entering and leaving its boundaries.

• Hypertonic, Isotonic, and Hypotonic situations/solutions

• Balance & Equilibrium

• Water soluble and insoluble substance control

Homeostasis

Keeping "normal" conditions for survival

​

​Proper functioning of systems

​

​Maintaining Equilibrium

Homeostasis

Negative Feedback Loop

​-Nothing bad about this system

​-Simply moves back to a "normal" state

-Ex. If your body temperature rises to 103 degrees (F), and then returns to 98F hours later, that is movement in a "negative" direction...but totally normal!​

Homeostasis

Positive Feedback Loop

This mechanism results, usually, in a permanent change

​

It also is a push to a "completion" of something. Ex. pregnancy

​

​It's a change in the SAME direction, unlike NF, whereas the change goes back the other way

Multiple Choice

Which of those examples was a POSITIVE feedback loop?

• The pregnant woman

• Cut on arm

• Blood pressure

• Running a fever

Compare and contrast negative and positive feedback loops

We will:

Understand the process of homeostasis in the human body

I will:

Today's Objectives

Cells, Cell Theory, Homeostasis

Multiple Choice

All living things are made up of...

• cells

• cell tissues

• organ

• organ systems

Multiple Choice

All cells come from___________ cells.

• pregnant

• pre-existing

• paternal

• pin size

Multiple Choice

An organism made of one cell is called

• unicellular organism

• multicellular organism

Multiple Choice

Which two systems work together to maintain homeostasis while transporting oxygen throughout the body and removing carbon dioxide?

• circulatory and respiratory

• respiratory and excretory

• circulatory and digestive

• respiratory and digestive

Multiple Choice

What do you think homeostasis is?

• Keeping your body systems stable

• Staying at home

• Making body systems unstable

Multiple Choice

Which of the following are in the correct order?

• organ system, cell, organ, tissue, organism

• cell, organ, tissue, organ system, organism

• cell, tissue, organelle, organ system, organism

• cell, tissue, organ, organ system, organism

Homeostasis District Assessment Review

​Cell Energy Cycle

Multiple Choice

Plants absorb the gas _______________ from the atmosphere through the process of _____________________.

• carbon dioxide;

  photosynthesis

• oxygen;

  diffusion

• nitrogen;

  cellular respiration

• hydrogen;

  evaporation

Multiple Choice

Plants release the gas _________________ into the atmosphere through the process of _____________________.

• hydrogen;

  transportation

• nitrogen;

  evaporation

• carbon dioxide;

  cellular respiration

• oxygen;

  photosynthesis

Multiple Choice

Which of the following is a biotic factor that will influence the rate of cellular respiration?

• pH levels

• Water temperature

• Sunlight

• Amount of plants

Multiple Choice

Diffusion is a process where molecules move from an area of ___________ concentration to an area of ____________ concentration.

• low;

  high

• low;

  low

• high;

  low

• high;

  high

Multiple Choice

Which body system is responsible for breathing? (ما هو جهاز الجسم المسؤول عن التنفس؟)

• musculoskeletal

• respiratory

• digestive

• circulatory

Multiple Choice

Which body system protects you from getting sick? (ما هو جهاز الجسم الذي يحميك من الإصابة بالمرض؟)

• digestive

• circulatory

• immune

• nervous

Multiple Choice

Which body system has the brain as its part? (ما هو نظام الجسم الذي يحتوي على الدماغ كجزء منه؟)

• digestive

• immune

• nervous

• musculoskeletal

Multiple Choice

______________ controls homeostasis.

• brain

• muscles

• skin

• hypothalamus

Multiple Choice

The hypothalamus is found in the ___________.

• skin

• brain

• heart

• stomach

Multiple Choice

Which of the following does homeostasis regulate?

• body temperature

• blood glucose

• water content

• all of the above