KIN 191 Lecture Notes - Symporter, Facilitated Diffusion, Posterior Pituitary
Document Summary
Consists of two kidneys; two ureters, which carry urine from the kidneys to the urinary bladder; urinary bladder; urethra, which carries urine from the bladder to the outside of the body. Excretion: the kidneys filter blood and produce a large volume of filtrate. Large molecules (proteins and blood cells) stay in the blood. The filtrate flows through the kidneys and is modified until it"s converted to urine. Waste products enter the filtrate and useful molecules are reabsorbed. Regulation of blood volume and pressure: they control the extracellular fluid volume in the body by producing either a large volume of dilute urine or a small volume of concentrated urine. Therefore, the kidneys regulate blood volume and hence blood pressure, Regulation of the concentration of solutes in the blood: they help regulate the concentration of the major ions. Regulation of extracellular fluid ph: they secrete variable amounts of h+ to help regulate the extra cellular fluid ph.