Flashcards in Lecture 3: Body Organisation Deck (13):
Name the three top functions of a protein
Structure for membranes, enzymes and hormones
How do cells maintain a closely regulated environment
Get a fresh supply of substrates, eliminate wastes and store/export products effectively
Advantages to being a single-celled organism
Small: dont require complex support, reproduction is simple and independent movement isn't necessary
Disadvantages to being single-celled
Ineffective if too large, insufficient surface area and internal transport over larger surfaces is more difficult
Advantage to being being multi-cellular
Organism can be large without large cells
Challenges with being multicellular
Absorption of food, oxygen, transportation within bodilfy factors, excretion, support, reproduction, communication and co-ordination between cells
How do multicellular organisms combat issues associated with being large and maintain a stable internal environment?
They have evolved behavioural responses and groups of specialized cells called tissues and organs
What organs provide a large surface area for gas exchange?
What do the sacs and folded surfaces of the digestive tract enable?
Water conservation, allow entry of nutrients and excretion of waste while avoiding dehydration and contact with other organisms
Function of the kidneys?
Excrete nitrogenous waste, minimize water, nutrient and electrolyte loss
Function of the circulatory system?
Exchange with organs (kidneys and lungs) and transport between organs and cells
A study based upon the theory that all natural things are desgined to fulfill a particular purpose.