BSC 109 Lecture Notes - Lecture 11: Renal Function, Afferent Arterioles, Distal Convoluted Tubule

• School: University of Alabama
• Department: Biological Sciences
• Course: BSC 109
• Professor: Austin R.Hicks

Document Summary

Muscular tube that transports urine from kidneys to bladder. Three layers of smooth muscle, lined with epithelial cells. Carries urine from bladder to outside of body. Figure 15. 3 the positions of the bladder, the urethra, and associated organs in fe/males. Due to a shortened urethra, women are more susceptible to utis. We have sphincters here, just like we do in the intestines. Each nephron consists of a long, thin, hollow tube (tubule) plus associated blood supply. Role of nephrons: remove approximately 180 liters of fluid from the blood daily, and return most of it, minus the wastes that are excreted. Blood supply is what our urine is formed from. 180 liters returns most of it without waste. Say you want to clean your house, you have trash throughout the house. Instead of picking up the trash, you take everything out of your house and put everything but the trash back in the house.