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Across 1. A hormone that allows more water to be reabsorbed through the collecting duct 5. Excreting urine from the body 10. The portion of the CNS that is responsible for the urination reflex is the: 11. The PASSIVE TRANSPORT which allows water to pass across the nephron membrane, and be reabsorbed from the filtrate is: 12. Outter region of the kidney 14. The nonselective function of filtration occurs in this area. 16. The location of the kidneys 17. All of the nephron is located in the cortex EXCEPT this part 19. The hormone that increases the reabsorption of Na+ by the kidneys, and therefore, INDIRECTLY, and powerfully, causes an increase in blood volume and blood pressure is: 21. During glomerular filtration, 45 gallons of this is produced each day: 22. The filtration of blood is made possible by the “pushing” action of this in the afferent arterioles

Down 2. What does urinary specific gravity measure? 3. The most important extracellular cation in nerve/muscle transmission is _____ . 4. The structure surrounding the glomerulus, which collects filtrate, is the 6. Most likely to occur when output is less than intake 7. The greatest extracellular fluid compartment- 8. The kidneys play a role in the homeostasis of pH by releasing or retaining 9. Kidneys role on RBC production by secretion of this substance 13. Aldosterone, the “salt-retaining” steroid hormone, is released from the 15. The presence of waste in the blood is termed- 18. Should never be found in the urine 20. Functioning unit of the Kidneys 23. The hormone that directly increases the reabsorption of Ca++ by the kidneys, and therefore, CAUSES AN INCREASE IN Ca++ BLOOD LEVELS IS: