Week 8 (Urinary System)

Question 1

What are the main functions of the Kidneys?

Answer 1

excrete nitrogenous waste, excess water and products of drug metabolism

Regulate water volume and chemical composition of body fluids

Secretes erythropoietin- stimulates RBCs from RBM

Question 2

What is the function of the Hilum?

Answer 2

exit and entry point of blood vessels and nerves (uterers exit)

Question 3

Define osmosis

Answer 3

movement of water particles from low to high concentration, over a permeable membrane- exert osmotic pull

Question 4

Define diffusion

Answer 4

movement of particles from a high to low concentration

Question 5

Why does the Nephron work?

Answer 5

1. osmosis
2. diffusion
3. reabsorption
4. secretion

Question 6

What are the 5 key components?

Answer 6

Glomerulus (Bowman’s Capsule)

Proximal Convoluted Tube

Loop of Henle- descending and ascending

Distal Convoluted Tube

Collecting Duct

Question 7

What is RAAS?

Answer 7

Renin Angiotensin Aldosterone System:
maintains blood pressure. leads to vasoconstriction- h20 retention in blood

Question 8

What is the Internal Sphincter?

Answer 8

smooth muscle, involuntary control

Question 9

What is the External Sphincter?

Answer 9

striated muscle, voluntary control

Question 10

What is the Urethra?

Answer 10

conveys urine cadually through pelvic cavity (male and female)