LIFE FUNCTIONS

• Meet Mr. Stranger!• You will learn the 10 life

functions and their definitions.

Life FunctionsLife functions are needed to keep a

stable or constant environment with in a living thing.

Metabolism• All of the chemical activities

happening in your body.

NutritionObtaining

raw materials

for….

Heterotrophic Autotrophic

• Ingestion =eat• Digestion =break down

• Egestion =GET RID OF Feces(POOP)

2 Types

Photosynthesis

SUN FOOD

DIGESTION

Respiration

• Turning food into energy

Respiration: releases the chemical energy stored in nutrients.

Growth• To get larger (using raw materials to make a larger body).

Synthesis• Turning the raw materials from your food into needed

materials.– Simple substances are combined To form complex substance

This is Synthesis

Absorption• Incorporating the materials from your

food into your body parts (in order to grow or heal).

Transport• Moving and

distributing materials throughout the body.

Reproduction• Making more of your own

species.

Excretion• Expelling toxic wastes from the body.

CO2, URINE, SWEAT

Carbon Dioxide

Urea

Regulation

Time

Body

Tem

pera

ture

• Maintaining Homeostasis • An Internal Balance

– .

37

Danger Zone

Danger Zone

Time

TEM

PERA

TURE

Which Life Function Is It?

Transport RegulationExcretion

Nutrition

Excretion

Reproduction

SynthesisAssimilation

Nutrition

The body temperature of a runner increases. The runner responds by perspiring, which lowers body temperature. This process is an example of….

1. maintenance of homeostasis 2. transport3. locomotion4. reproduction

If a human system fails to function properly, what is the most likely result?

1. a stable rate of metabolism 2. a disturbance in homeostasis 3. a change in the method of respiration 4. a change in the DNA

Which life process is classified as autotrophic in some organisms and heterotrophic in other organisms?

1. hormonal regulation 2. nutrition 3. anaerobic respiration 4. transport

When an individual goes without eating for a day, his or her blood sugar level remains about the same throughout the day. This relatively constant condition is maintained by……

1. regulation2. egestion 3. reproduction 4. growth of cells

Describe the difference:

• Sexual and Asexual

• Autotrophic and Heterotrophic