Posted: April 19th, 2017

In general and in your own words, briefly describe the role of the three regions to the renal tubule section of a nephron.

Solution Description

Module 07 Lab Worksheet:  Urinary System

Pre-Lab Evaluation Questions

The pre-lab evaluation questions must be answered prior to lab and demonstrated to your lab instructor.  You must read through the assigned chapter readings, lab introduction, objectives, overview and procedure to answer these questions.


Please cite your work for any reference source you utilize in answering these questions.


1.Describe the blood flow to the kidney and within including the renal artery and vein, interlobar arteries, cortical radiate arteries and afferent arteries? 
The renal arteries branch off of the abdominal aorta and supply the kidneys


with blood. The arterial supply of the kidneys is variable from person to


person, and there may be one or more renal arteries supplying each kidney.


Due to the position of the aorta, the inferior vena cava, and the kidneys in the


body, the right renal artery is normally longer than the left renal artery. The


renal arteries carry a large portion of the total blood flow to the kidneys, up


to a third of the total cardiac output can pass through the renal arteries to be


filtered by the kidneys. Renal blood supply starts with the branching of the


aorta into the renal arteries (which are each named based on the region of


the kidney they pass through) and ends with the exiting of the renal veins to


join the inferior vena cava. The renal arteries split into several segmental


arteries upon entering the kidneys. Each segmental artery splits further into


several interlobar arteries and enters the renal columns, which supply the


renal lobes. The interlobar arteries split at the junction of the renal cortex


and medulla to form the arcuate arteries. The arcuate “bow shaped” arteries


form arcs along the base of the medullary pyramids. Cortical radiate arteries,

as the name suggests, radiate out from the arcuate arteries. The cortical


radiate arteries branch into numerous afferent arterioles, and then enter the


  • supplying the nephrons (Boundless, 2015).


2.In your own words, describe the anatomy and function of the components that make up the renal corpuscle.     


A renal corpuscle is composed of a tangle of small blood vessels, called a


glomerulus, which filters your blood, and the Bowman’s capsule, which


collects the filtered molecules and directs them into the tubing of your


3.In general and in your own words, briefly describe the role of the three regions to the renal tubule section of a nephron. 
The three regions to the renal tube are divided by the proximal tube, the loop


of Henle, and the duct via medulla. The proximal tube is mostly present in the


cortex and performs the part of reabsorption of nutrients and minerals from


tubular fluid and then transports these absorbed components to blood


located in peritubular capillaries.


The loop of Henle goes down dipper in the medulla and assists the


establishment of medullary interstitial fluid’s environment. Then the loop of


Henle comes back as distal convoluted tubule to juxtaglomerular apparatus


of corpuscle, a place from where it originated. Lastly, the collecting duct via


medulla goes back to pour into pelvis and nephron unit’s end point.


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