The Nephron- Renal corpuscle Flashcards Preview

A&P 3.2 > The Nephron- Renal corpuscle > Flashcards

Flashcards in The Nephron- Renal corpuscle Deck (22):
1

What are the two structural components of the nephron?

The renal corpuscle and the renal tubule

2

What are the three functions of the kidney?

Filtration, reabsorption, secretion

3

There are ____ nephrons located both in the renal ______ and the renal _______

1.25 million
cortex
medulla

4

Describe a cortical nephron

85% Nephron tubules only go a short way into the pyramid, the glomerulus goes further

5

Describe a juxtamedullary nephron

15% These tubules are very long, usually extending to the apex of the pyramid

6

Where are glomeruli?

In cortex, are closer to the base of the pyramid

7

What two parts make the renal corpuscle?

The glomerulus and Bowman's capsule

8

What does the glomerulus look like?

A “tuft” of fenestrated capillaries, like a ball of yarn

9

In the glomerulus:
An _______ arteriole brings blood in, ______ in diameter
An _______ arteriole drains blood out- _______ in diameter

Afferent/ larger
Efferent/smaller

10

Bowman's capsule is also called the "..." What's it's function?

Glomerular capsule
Surrounds the glomerulus to “catch” the filtrate
A collecting area for filtrate being filtered from the glomerulus

11

What epitheliums make up Bowman's capsule?

Made up of a visceral and parietal epithelium

12

What makes up the visceral epithelium of Bowman's capsule? What does it do?

podocytes, that cover the capillary

13

What makes up the parietal epithelium of Bowman's capsule?

Simpel squamous epithelium

14

Where is the filtration membrane located?

In Bowman's glad

15

What does the filtration membrane do?

This is non-selective filtering, it only filters by size

16

What are the three parts of the filtration membrane?

1- Pores of the fenestrated capillary
2- Basement membrane
3- Filtration slit- A space between interdigitating pedicels

17

What is a pedicel? What does it come off?

Pedicels come off the foot processes of podocytes, like interlaced fingers

18

What passes through the filtration membrane?

Water, waste, sodium, dissolved solutes, and glucose pass through

19

What doesn't pass through the filtration membrane?

RBCs, WBCs, and loose proteins like albumins and transporters do not pass

20

How much blood is filtered in 40 minutes? In a while day?

40 min- Total Blood Volume
1 day- 180L

21

Because the efferent arteriole is narrower in diameter than the afferent arteriole, blood in the glomerular capillaries is under ________ and ______ takes place

Pressure
Filtration

22

Liquid and solutes are forced through the _______ ______, _______ _________, and _______ _______, and ends up inside the capsular space.

capillary pores
basement membrane
filtration slits