Which of these is an ethical issue associated with stem cell therapy? a) implantation of stem cells into patients is unethical. b) stem cell therapy involves shutting down the immune system. c) stem cells are extracted from patients without their consent. d) embryos are destroyed when stem cells are obtained from them.

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides