IB Bio A1.1- Water

metabolism

reactants and products of chemical reactions dissolve in water

nutrition

photosynthesis and digestion occur in aqueous solutions (water)

growth

cytoplasm is aqueous, by gaining water it can grow

reproduction

sperm swim through the water, fetus supported by water in the uterus

movement

aquatic organisms swim, blood and sap transported through it

response to stimuli

nerve impulses caused by dissolved sodium and potassium ions

excretion

urine is an aqueous solution of waster product, sweat

homeostasis

blood plasma and tissue fluid form stable environment

buoyancy

solids float in fluids if density is lower

viscosity

resistance to flow, result of cohesion

thermal conductivity

ability to conduct heat

specific heat capacity

how much heat is needed to change the temperature of the water (more dense, high heat capacity, more stable environment)

capillary action

movement of water within narrow spaces against gravity due to adhesion and cohesion

hydrogen bonds

weak attractions between water molecules that contribute to its unique properties.