1. Do Now: What is a Living Thing?
Put your belongings down, bring your class material to your desk
On a piece of loose-leaf paper, answer the following question:
-Imagine you are an astronaut stepping foot onto an unexplored planet.
-You find a strange object on the planet and want to determine if it is a living thing.
-How do you determine this? (Think about what all living things have in common, ex. A Rock VS a Tree)

2. Life Functions of Living Things

3. Life Functions Respiration Regulation Reproduction Excretion Growth
Nutrition
Transport
Synthesis
=R R R E G N T S

4. What is Nutrition?
The process by which an organism takes in materials from the external environment and changes them into a usable form
Plants: Autotrophs
Animals: Heterotrophs
The usable parts of food are known as nutrients
Water, minerals, sugars (carbohydrates), fats (lipids), and proteins are nutrients
Is a three part process
Ingestion: the taking in of food
Digestion: the breaking down of food
Egestion: the elimination of undigested food (solid waste)

5. Transport
The process by which items are absorbed and distributed (circulated) by a cell or tissue
The process by which materials are carried across an organelle membrane (ex. cell, nuclear, or mitochondria membrane)

6. Respiration
The process by which chemical energy from nutrients is released
The Nutrients are broken down into simpler forms causing energy to be released
The chemical energy is converted into ATP
2 Types:

7. Excretion
The removal of cellular waste products from the body or from cells
Salt water (sweat), urine, and Carbon dioxide are the waste products excreted from your body
** Remember if it cannot fit through the pores of your skin it is not waste***

8. Synthesis
The assembly of 1 large particle from 1 or more small particles
The manufacturing of compound and complex sugars, protein assembly and lipid generation are examples of synthesis

9. Growth The increase in size
Usually, the raw materials for growth are produced through synthesis

10. Regulation
The coordination and control of all life functions within an organism
This is usually the 1st life function
Improper regulation causes metabolism problems
Responding to changes in the environment to maintain homeostasis.
Plants grow towards light, people react to temperature

11. Reproduction
Production of new individuals, also capable of reproducing
Not required for a single organism to survive, but necessary for a species
2 types:
1) asexual reproduction--involves one parent and the offspring are identical to the parent
2) sexual reproduction--involves two parents and the offspring is a combination of both parents

12. Metabolism and Homeostasis
Metabolism is the sum of all life functions working together to keep an organism alive—not just related to food
An organism's external (outside) environment is always changing. By keeping control and regulating its metabolic activities, an organism can maintain a stable internal (inside) environment. This is called HOMEOSTASIS.

13. Independent Work
Please complete the hand out. You may use your notes or a textbook as a reference
You will receive a short assessment on this material before leaving class today. Please make sure you know it!