White Blood cells engulf bacteria in order to fight infection
Endocytosis
WHen nerve cells secrete neurotransmitters to send signals throughout the body
Exocytosis
Potassium (K+) Chlorine (Cl-) Sodium (Na+)
Molecular PUmps
Water
Osmosis
glucose, sugar, calcium (Ca+2)
Facilitated Diffusion
O2& CO2
Simple DIffusion