The Urinary System Flashcards

1
Q

What does the hilum contain?

A

Renal vessels, nerves, and the renal pelvis

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2
Q

What constitues a lobe?

A

A medullary pyramid and the overlying cortex plus 1/2 of the renal columns on each side of the pyramid

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3
Q

What is a calyx?

A

Extensions of the renal pelvis

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4
Q

How man renal papillae does a minor calyx surround?

A

One

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5
Q

What is the functional unit in the kidney and what does it consist of?

A

Nephron - renal corpuscle and tubule

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6
Q

What are the four major segments and their components?

A

Proximal thick segment - PCT and PST
Thin segment - Thin limb (TL)
Distal thick segment - MTAL and CTAL
Distal Convoluted Tube (DCT)

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7
Q

What segments make up the Loop of Henle?

A

PST, TL, and MTAL

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8
Q

What is the division point between proximal and distal nephron?

A

Macula densa (Herron)

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9
Q

What are the openings from the renal papilla into the minor calyces termed?

A

Ducts of Bellini

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10
Q

Is the afferent or efferent arteriole larger?

A

Afferent

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11
Q

What are the two layers of Bowman’s capsule and their cellular composition

A

Visceral - Podocytes

Parietal - Simple squamous epithelium

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12
Q

What is the space between the visceral and parietal layers of Bowman’s capsule?

A

Urinary space

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13
Q

What cells are distributed amongst capillaries in the glomerulus and what is their function?

A

Mesangial cells - phagocytose debris, provide structural suport, repair (IL1 & PDGF)

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14
Q

What are the subdivisions of the cortex?

A

Cortical labyrinths and medullary rays

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15
Q

What does a cortical labyrinth consist of?

A

Renal corpuscles, PCT and DCT

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16
Q

What does a medullary ray consist of?

A

Straight tubules and collecting ducts

17
Q

What does a lobule consist of?

A

A medullary ray and adjacent one-half labyrinths

18
Q

What does the medulla consist of?

A

PST, thin limb, and DST

19
Q

Name arterial vasculature from renal artery to efferent arteriole.

A

Renal Artery - Lobar Arteries - Interlobar Arteries - Arcuate Arteries - Interlobular Arteries - Afferent Arterioles - Glomerulus - Efferent Arteriole

20
Q

What do efferent arterioles produce in cortical and juxtamedullary glomeruli?

A

Cortical - peritubular capillaries

Juxtamedullary - vasa recta (arteriole recta)

21
Q

What artery is present at the corticomedullary junction?

A

Arcuate artery

22
Q

What artery is present at the medullary ray boundary?

A

Interlobular artery

23
Q

Where does MOST reabsorption take place?

24
Q

Where does MOST secretion take place?

A

Thin limb, distal tubules, and collecting ducts

25
What does the juxtaglomerular apparatus consist of?
Macula densa, juxtaglomerular cells, and extraglomerular mesangial cells
26
What does the juxtaglomerular apparatus do?
Regulate blood pressure
27
What do macula densa cells do?
Monitor blood volume and [Na]
28
What do juxtaglomerular cells do?
Secrete renin when stimulated by macula densa cells
29
Name the route of discharge of urine from collecting ducts to bladder.
Collecting Ducts - Ducts of Bellini - Minor Calyx - Major Calyx - Renal Pelvis - Ureter - Bladder
30
What cell type lines the excretory passages?
Transitional epithelium | *Note the lower part of the urethra has stratified or pseudostratified columnar epithelium
31
What is the general structure of excretory passages?
Mucosa, muscularis, and adventitia (serosa) | *Note except urethra
32
How many muscle layers in ureter and bladder?
Upper Ureter - 2 Lower Ureter - 3 Bladder - 3 (Inner longitudinal, Middle circular, Outer longitudinal)