Urinary System Flashcards

1
Q

Several functions of the kidneys

A
regulation of blood cells of several ions (Na, K, Ca and Cl)
regulation of blood pH
regulation of blood volume
regulation of blood pressure
production of hormones
regulation of blood glucose levels
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2
Q

what are some metabolic wastes excreted by the kidneys?

A

ammonia, urea from deamination of amino acids, bilirubin, creatinine and uric acid

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3
Q

Function of ureters

A

transport urine from kidney to excrete waste

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4
Q

function of bladder

A

stores urine and expels into urethra

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5
Q

function of urethra

A

discharges urine from body

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6
Q

The kidneys are described as ______ that is, they lie posterior to the ______peritoneum.

A

Retroperitoneal

abdominal

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7
Q

what is the indentation on the medial surface of each kidney called?

A

Renal Hilum

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8
Q

What structures enter or exit the kidney at the hilum?

A

Ureter, blood vessels, lymphatic vessels, and nerves

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9
Q

what are the 3 layers of connective tissue surrounding each kidney, from deepest to most superficial/

A

Renal Capsule
Adipose capsule
Renal Fascia

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10
Q

Function of the renal capsule

A

barrier against trauma and helps maintain shape of kidney

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11
Q

Function of Adipose Capsule

A

Protects kidney from trauma and holds it firmly in place within abdominal cavity

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12
Q

Function of Renal Fascia

A

thin layer that anchors kidney to the surrounding structures to the abdominal wall

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13
Q

A kidney consists of an external smooth-textured layer called the_____ and a deeper layer, the_____consisting of several triangular renal_____.

A

renal cortex
renal medulla
pyramids

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14
Q

Inward projection of cortex lie between these structures and are called_____.

A

Renal columns

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15
Q

The tips of the triangular structures are called _____.

A

Papilla

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16
Q

The central space of the kidney is called the _____and is nearly filled with the funnel-like end of the ureter called the ____along with its extensions called major and minor______.

A

Renal Sinus
pelvis
calyces

17
Q

Blood is supplied to the kidneys by the:

A

Renal arteries

18
Q

What is a nephron?

A

Function unit of the kidney

19
Q

vascular components of a nephron

A

Afferent arterioles–>Glomerulus–>Efferent arterioles–>Peritubluar capillaries

20
Q

tubular components of a nephron

A

bowman’s capsule–>proximal convoluted tubule–>Loop of Henle–>Distal convoluted tubule–>collecting duct

21
Q

What type of tissue makes up the Bowman’s capsule, tubules and collecting ducts?

A

Epithelial

double walled

22
Q

Alongside macula densa, the wall of the afferent arteriole contains modified smooth muscle fibers called:
Also secretes renin and helps to increase kidney BP

A

Juxtaglomerular Cells

23
Q

columnar tubule cells are crowded together

A

macula densa

24
Q

both of these help regulate blood pressure

A

macula densa and juxtaglomerular cells

25
Pathway from glomerulus to the urethra
``` 1--glomerulus 2--Bowman's capsule 3--PCT 4--Loop of Henle 5--DCT 6--Collecting Duct 7--Papillary duct 8--minor calyx 9--major calyx 10--renal pelvis 11--ureter 12--urinary bladder 13--urethra ```
26
Where does filtrate become urine?
End of collecting duct
27
What is the difference between tubular fluid and urine?
Urine is waste of excess material | filtrate is solute rich, low protein, plasma like fluid from which urine is formed.
28
What are the 3 basic steps of urine formation?
Glomerular Filtration tubular reabsorption tubular secretion
29
The initial process is _____in which plasma minus proteins cross the glomerulus to enter the bowman's capsule
Glomerular filtration
30
Some substances are selectively removed from this fluid and returned to the blood by the process of ______which results in retention of these substances by the body.
tubular reabsorption
31
A few substances are added to the tubular fluid by the process of _____
tubular secretion
32
Where in the nephron do the last 2 processes of urine formation occur?
PCT, DCT and collecting duct
33
where does glomerular filtration occur?
renal capsule
34
approximately what % of the plasma volume becomes filtrate?
16-20%
35
What 3 tissue layers make up the filtration membrane?
Glomerular endothelial cell, basal lamina filtration slit caused by a podocyte
36
how does filtrate differ from plasma/
Filtrate is protein free plasma
37
the major driving forcing force for glomerular filtration is
pressure