Bio Unit 1- Ch 1: Life Processes

Mrs. C Gren

Mrs. C Gren

Movement, respiration, sensitivity, control, growth, reproduction, excretion, and nutrition

What is movement?

an action by an organism or part of an organism causing a change of position or place. movement in plants: venus fly trap closing. movement in animals: a fish swimming. animals move their whole bodies but plants change their orientation

What is respiration?

the chemical reaction (taking place in the mitochondria) that breaks down nutrient molecules in all living cells to release energy for metabolism. respiration in plants: converting glucose and oxygen into energy and water for cellular activities like growth, maintenance, and reproduction. respiration in animals: using gas exchange to break down ingested food for energy

What is sensitivity?

the ability to detect or sense stimuli in the internal or external environment and to make appropriate response (involves nervous and skeletal system) plants: orientation changes when it’s placed by a sunny window. animals: eyes close when light shines into them

What is control?

living organisms must control their internal environment in order to keep conditions within required limits (homeostasis). animals: thermoregulations keeps body temperature a the optimum level (37 degrees). plants: use transpiration to maintain a suitable temperature

What is growth?

a permanent increase in size and mass by an increase in cell number or cell size. plants: grows up towards sunlight (phototropism) and roots grow down because of gravity (geotropism). animals: their mass and weight increases from baby to adult

What is reproduction?

the process that makes more of the same kind of organism/species plants: pollination of a flower (anther and filaments carrying pollen to the ovaries). animals: parents fusing sex cells to make offspring

What is excretion?

the removal from organisms of toxic materials, the waste products of metabolism, and substances in excess of requirements. animals: carbon dioxide and water are excreted during respiration. plants: oxygen from photosynthesis and water and carbon dioxide from respiration

What is nutrition?

the taking in of materials for energy, growth, and development. plants: use water, sunlight, and carbon dioxide to produce glucose and oxygen for nutrition (autotrophic). animals: consume other organisms and break it down during digestion, they need organic compounds like glucose, ions, and water

Locomotion

movement of an organism from place to place