The Kidneys And The Excretory System - Part 5 (T2) Flashcards Preview

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Flashcards in The Kidneys And The Excretory System - Part 5 (T2) Deck (10):
1

The kidneys produce around ....... of glomerular filtrate per minute, or about ....... per day

The kidneys produce around 25 cm3 of glomerular filtrate per minute, or about 180 dm3 per day

2

How much urine is lost from the body every day, equating to what % of of the volume filtered through the capsules?

Around 1.5 dm3 - less than 1% of the volume filtered through the capsules

3

What happens to the glomerular filtrate (about 99% of what is produced) that is not lost?

It is reabsorbed back into the blood

4

What does the terms diuresis refer to?

The flow of urine from the body

5

What does anti-diuresis mean?

Producing less urine

6

What region of the brain detects water loss, leading to blood becoming more concentrated?

The hypothalamus

7

Explain in detail how the hypothalamus and ADH maintain the amount of water in our bodies...

- upon detecting a lack / loss of water in the blood, the hypothalamus cause the pituitary gland to release more ADH
- the ADH travels in the blood stream to the kidney tubules
- when it reaches it causes the collecting duct to become more permeable to water, so more water is reabsorbed back into the blood
- when the water content returns to normal, this acts as a signal to switch off the release of ADH
- less ADH will then reach the kidney tubules which consequently reabsorbed less water
- is you were to then drink a large quantity of water the blood will become too dilute and this will lead to even less ADH secretion
- in turn, the kidney tubules become less permeable to water and retain less water, so more water passes out of the body in the urine

8

Explain in brief steps how the body rectifies things when there is too little water in the blood...

- hypothalamus detects water level
- pituitary gland releases ADH
- more water is reabsorbed by the kidneys
- less water is lost in the urine
- blood water level returns to normal

9

Explain in brief steps how the body rectifies things when there is too much water in the blood...

- hypothalamus detects water level
- the pituitary gland release less ADH
- less water is reabsorbed by the kidneys
- more water is lost in the urine
- blood water level returns to normal

10

A kidney transplant involves connecting two blood vessels and tube to the transplanted kidney. Name the two blood vessels and the tube..

- pelvic artery
- pelvic vein
- ureter

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