LIFE FUNCTIONS

•Meet Mr. Stranger!

•You will learn the 10 life functions and their definitions.

Life Functions

Life 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.

Respiration

• Turning food into energy

Respiration: releases the chemical energy stored in nutrients.

Synthesis• Turning the raw materials from your food into

needed materials.

– Simple substances are combined To form complex substance

This is Synthesis

Transport• Moving and

distributing materials throughout the body.

Reproduction• Making more of your own

species.

Reproduction: 2 Types:

Sexual Reproduction:

2 parents make a unique individual.

*1/2 genes from mom

*½ genes from dad

• Asexual reproduction requires one parent cell and offspring are identical to the original.

Absorption

• Incorporating the materials from your

food into your body parts (in order to grow

or heal).

Nutrition

Obtaining

raw

materials

for….

Heterotrophic Autotrophic

• Ingestion =eat

• Digestion =break down

• Egestion =GET RID OF Feces(POOP)

2 Types

Photosynthesis

SUN FOOD

Heterotroph or Autotroph?

Heterotroph or Autotroph?

Growth• To get larger

(using raw materials to make a larger body).

Excretion• Expelling toxic wastes from the body.

CO2, URINE, SWEAT

Carbon Dioxide

Urea

Regulation

Time

Bo

dy

Te

mp

eratu

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• Maintaining Homeostasis

an internal balance.

37

Danger Zone

Danger Zone

Time

TE

MP

ER

AT

UR

E

Regulation– Staying out of danger (reflexes)

– Constant body temperature (Nervous system)

– Constant water level (Excretory system)

– Constant blood sugar level (Endocrine System)

– Constant blood pressure (Nervous System)

Time

Blo

od S

ug

ar

Which Life Function Is It?

TransportRegulation

Excretion

Nutrition

Excretion

Reproduction

SynthesisNutrition

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. transport

3. locomotion

4. 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. regulation

2. egestion

3. reproduction

4. growth of cells

Describe the difference:

• Sexual and Asexual

• Autotrophic and Heterotrophic