HD FS 397 Lecture Notes - Lecture 51: Renin, Urination, Ureter

• School: PSU
• Department: Human Development and Family Studies
• Course: HD FS 397
• Professor: Matthew Ishler

Document Summary

Water-salt balance: helps maintain blood pressure. Kidneys: excrete hydrogen ions (h+, reabsorb bicarbonate ions (hco3. Acid-base balance helps maintain a blood ph of 7. 4. Erythropoietin (epo: secreted by the kidneys. Filtration and reabsorption of nutrients and synthesis of vitamin d. The urinary system is responsible for reabsorbing filtered nutrients. Vitamin d: a molecule that promotes calcium absorption from the digestive tract. Kidneys (2: bean-shaped, fist-sized organ, urine is formed. Ureters (2: small, muscular tubes, carry urine from the kidneys to the bladder. Bladder (1: expandable organ, stores urine. Until it is expelled from the body: it is not where the urine is made. Carries urine from the bladder to the outside of the body. It stores urine: sphincters keep it closed. Expandable wall contains: a middle layer of circular fibers of smooth muscle, 2 layers of longitudinal smooth muscle. Filling with urine activates stretch receptors: signal to spinal cord/brain. Tell you it is time to go to the bathroom.