Unit 1 life functions

Biology Introduction: Unit 1-Life Functions

1. 1 What is Biology ? Biology is the study of life

2. 2 SO… WHAT IS LIFE Life is defined by a list of characteristics organisms must possess to be considered living. All living organisms contain the same life functions although their means of achieving them may be different

3. 3 Life Functions 1. Nutrition - activities of an organism, used to obtain materials from the environment and process them for their use. Two types of nutrition 2. Transport - involves the absorption and distribution of materials within an organism. 3. Respiration - includes the chemical process by which an organism obtains energy (ATP) from its food (Glucose). Autotrophic Heterotrophic Materials CO 2 H 2 O organic food Light energy Process Photosynthesis Ingest, digest, egestion Organism Plants and algae other organisms

4. 4 5. Synthesis - includes the chemical activities by which an organism builds larger molecules from smaller ones. (to Make) 6. Regulation - involves the control and coordination of various activities in an organism. (Nervous system and Endocrine system play a role) 4. Excretion - the removal of wastes produced by cells during metabolic activities. Life Functions

5. 5 Life Functions 7. Growth - increases in cell size and/or cell numbers. 8. Reproduction - production of new individuals. A species survival depends on reproduction. An individual’s life does not.

6. 6 II. Important Terms 1. Metabolism - refers to all the life functions needed to sustain life. Does not include reproduction 2. Homeostasis - the maintenance of a stable internal environment. (Regulation helps to achieve Homeostasis) Your body systems are constantly adjusting to maintain homeostasis.

7. MR STRANGER M=Metabolism R= Respiration S= Synthesis T= Transport R= Regulation A= Ambulation (Locomotion) N=Nutrition G=Growth E=Excretion R= Reproduction 7 Hi Guys!!! I’m Mr Stranger