BIO 246 FINAL EXAM QUESTIONS & ANSWERS 100% Correct!

define homeostasis - ANSWERinternal environment risk kept constant in the face of changes in external environment define diffusion - ANSWERmovement of solutes hi-lo can diffusion reach equilibrium? - ANSWERyes, still movement define osmosis - ANSWERmovement of water hi-lo facilitated diffusion - ANSWERrequires a carrier or channel, can become saturated active transport - ANSWERmovement of solutes lo-hi, requires ATP primary active transport - ANSWERuses a pump secondary active transport - ANSWERsymporter- same direction antiporter- opposite directions bulk transport- endocytosis - ANSWERphago, pino, receptor mediated, requires ATP exocytosis - ANSWERsecretion, requires ATP what determines the phenotype of a cell? - ANSWERproteins which are expressed depending on transcription factors define transcription factors - ANSWERdifferentiate cells what is the main purpose of stem cells? - ANSWERconstant supply of new cells for all stages of life requirements to be a stem cell - ANSWERself renewal undifferentiated define self renewal - ANSWERstem cell replicates through mitosis explain differentiation of a stem cell - ANSWERstem cell undergoes self renewal and other daughter cell differentiates levels of stem cells - ANSWERtotipotent