Bio 253 Exam 1 Questions And Answers With Verified Solutions

Nucleic Acids {Ans: Polymers of Nucleotides Nucleotide made of 5-carbon sugar (pentose) bound to a phosphate group and a nitrogenous base DNA- stores genetic info RNA- transfers the genetic info}Lymphatic System {Ans: Consists of Lymph (fluid tissue) that travels through vessels Returns excess tissue fluid to the cardiovascular system Transports materials through the body Primary role is defense against disease}Negative Feedback {Ans: Opposes a change in body conditions Restores conditions to Set Point Self Regulating Ex: Body temp rises, negative feedback works to lower to normal}Gap Junctions {Ans: Hollow 'straws' penetrate both cells, allowing for exchange of material between them}Hemidesmosomes {Ans: Epithelial Tissue Protein fibers are hooked to the basement membrane under epithelium Anchor epithelial cells to their basement membranes}Urinary System {Ans: Kidneys, Ureters, Urinary Bladder, Uterus Kidneys filter metabolic wastes from blood (produce urine) Regulates chemical content of blood}