Aweightlifter who practices five hours a day observes that his muscles have gotten larger. he tells you that his muscle cells are dividing and consequently making him stronger, so he can lift more weight. is his explanation correct? why or why not? how would you explain muscle structure to the weightlifter?

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure. which would most likely occur in the kidney? a)more water would be transferred from the nephron. b)less water would be absorbed into the nephron. c)the amount of water in the bladder would decrease. d)the amount of water in the blood would increase.