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Science > Excretory System > Flashcards

Excretory System Flashcards

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0
Q

What produces ammonia

A

Break down of proteins and nucleic acids produces ammonia

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1
Q

What are the functions of the excretory system

A

To eliminate waste
Collect water and filter body fluids
Remove and concentrate waste products from body fluids
Eliminate excretory products from the the body
Regulate volume and chemical make up of blood.

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2
Q

Is ammonia toxic

A

Yes

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3
Q

What do mammalian livers do with ammonia

A

Mammalian livers convert ammonia into uric acid.

By doing so it can excrete it with little water loss

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4
Q

Why do many aquatic organisms excrete ammonia

A

Because it can be diluted by water

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5
Q

What is the functional unit of the excretory system

A

The nephron

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6
Q

What are the key functions of the nephron

A

Filtration
Reobsorption
Secretion
Excretion

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7
Q

What does the Reobsorption do

A

Good stuff gets out back in blood

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8
Q

What is secretion

A

Secretion of some water

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9
Q

What is filtration

A

Filters blood. Bad stuff gets turned into waste

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10
Q

Why do you filter out the good stuff

A

So it doesn’t end up in urine

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11
Q

What are the different parts of the urinary system

A

Kidneys
Ureters
Bladder
Urethra

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12
Q

Where are nephrons

A

In kidneys

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13
Q

What are the 3 parts of the kidneys

A

Medulla
Cortex
Pelvis

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14
Q

What is the functional unit of the kidney

A

Nephron

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15
Q

What are the different parts of the nephron

A 
Renal artery
Renal vein
Bow mans capsule
Nephron tubule
Glomerulus 
Proximal convoluted tubule
Loop of henle
Distal convoluted tubule 
Collecting duct
16
Q

About how many nephrons are there

A

About 1 million

17
Q

What are the functions of the tubules

A

Reobsorption of glucose
Reobsorption of salts
Reobsorption of water

18
Q

Where is the Reobsorption of glucose

A

Proximal convolted tubule

19
Q

Where is the Reobsorption of oh salts

A

PAT AT DCT

20
Q

How does blood enter the kidneys

A

Through renal arteries

21
Q

How does blood leave

A

Through the renal vein

22
Q

Where is urine produced

A

The kidneys

23
Q

What is urine made of

A

Excess water and waste products

24
Q

Where does urine leave the kidneys

A

Through the ureter

25
Q

Where does the urine go after the ureter

A

Urinary bladder

26
Q

Where does urine go after the urinary bladder

A

Urethra

27
Q

How much blood does each kidney process a day

A

About 1000 litres

Science (17 decks)

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