lab_7_discussion

lab_7_discussion - NPB 101L Exercise 7 The Role of The...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
NPB 101L - Exercise 7 The Role of The Kidney In Extracellular Fluid Homeostasis 1. What is the role of the renal system? Maintain homeostasis and excretes wastes and metabolites. Filters and excretes. Draw a diagram of a nephron and explain the movement of Na + , urea, glucose, Cl - and water across the luminal walls of the nephron. Sodium, chloride and glucose and water get reabsorbed by the proximal, distal tubules and collecting duct; Into the peritubular capillaries (lumen) . How does this promote urine formation and water reabsorption? Important materials such as sodium and glucose get reabsorbed while urea gets excreted leaving a somewhat concentrated urine as it reaches the bladder. 2. Define clearance. Volume of plasma that is completely cleared of a substance per unit time. Clearance = concentration of solute in urine x urine flow rate / concentration of solute in plasma. What are inulin and creatinine (muscle by product made at a relatively constant rate and is a good indicator for GFR because it is not reabsorbed but slightly excreted by the distal tubulesa)? Why are clearance rates for inulin or creatinine good estimators of the GFR? What are the forces that influence GFR and what are their effects upon filtration? The
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

lab_7_discussion - NPB 101L Exercise 7 The Role of The...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online