Renal Flashcards

1
Q

What 6 functions do the kidneys have?

A
  1. Eliminate waste substances
  2. Salvage essential compounds
  3. Regulate ion levels
  4. Maintain stable osmolarity
  5. Regulate plasma volume
  6. Produce hormones
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2
Q

Are the kidneys lightly vascularised?

A

No, they are heavily vascularised.

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3
Q

How much cardiac output is received by the kidneys? (percentage)

A

25% of all cardiac output.

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4
Q

What percentage of plasma is converted to primitive urine?

A

20% of the plasma filtered through the kidneys.

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5
Q

After reabsorption, what percentage of the primitive urine remains and travels onto the bladder?

A

Just 1% remains to travel to the bladder and later be expelled from the body.

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6
Q

How long does it take for the entire circulatory volume to be filtered and reabsorbed?

A

30 minutes.

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7
Q

What 3 vessels are connected to a kidney?

A

Renal artery.
Renal vein.
Ureter.

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8
Q

On both gross and histological levels, are kidneys in the domestic animals similar or different?

A

Gross - very different.

Histologically - very similar.

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9
Q

Which is more cranial: right or left kidney?

A

Right kidney.

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10
Q

The renal artery is a short, direct branch of the aorta. What do you expect the pressure to be like in the renal artery?

A

The renal artery is under high pressure.

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11
Q

Where does the ureter connect?

A

Kidney to bladder.

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12
Q

Where does the urethra connect?

A

Bladder to genitals (allowing urine to exit the body).

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13
Q

What are the 3 gross sections of the kidney?

A

Pelvis, Medulla, Cortex.

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14
Q

Where does the renal artery stem from?

A

The aorta.

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15
Q

Where does the renal vein return to?

A

The caudal vena cava.

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16
Q

What is a renal pyramid?

A

The arrangements of tissue in the medulla.

17
Q

What is a papilla?

A

The apex of the renal pyramid where the urine passes through to the pelvis.

18
Q

What is the pelvis?

A

The end of the ureter that enters the kidney.

19
Q

At what point can the composition of urine no longer be changed?

A

Once it enters the ureter (pelvis).

20
Q

What is parenchyma? (Not solely a kidney term)

A

The functional tissue of an organ (as opposed to the structural tissue).

21
Q

What is the functional unit called that makes up the kidney parenchyma?

A

Nephrons.

22
Q

What is a nephron?

A

The part of the kidney that filters the plasma and produces urine.

23
Q

Where is the Bowman’s capsule located?

A

The cortex.

24
Q

Where is the proximal convoluted tubule located?

A

The cortex.

25
Q

Where is the loop of Henle located?

A

The outer and inner medulla.

26
Q

What causes the creation of an inner and outer medulla?

A

The change of diameter (of the lumen) in the loop of Henle.

Wider - outer medulla. Narrower - inner medulla.

27
Q

Where is the distal convoluted tubule and the start of the collecting duct found?

A

The cortex.

28
Q

Where is the majority of the collecting duct found.

A

The outer and inner medulla.

29
Q

What is the glomerulus?

A

A tuft of capillaries supplied by the afferent arteriole.