part 2

Question 1

What is excretion?

Answer 1

Excretion is the process of separating waste from the body fluid and eliminating them

Question 2

Excretion is dependent on 3 functions, what are they?

Answer 2

Filtration - movement of blood

Reabsorption - The transfer of ions, nutrients, sodium and water absorbed from urine during the transfer in the Nephron back to blood.

Secretion - transport of waste materials from blood to the nephron

Question 3

In filtration, filtration is dependent on 2 factors, what are they?

Answer 3

Permeability (how easy to pass through) of capillaries and blood pressure

Question 4

In filtration, the filtered fluid from the blood and waste product (water and solutes does NOT consist of proteins) is called filtrate. These filtrate consists of..

Answer 4

Water, urea, glucose, amino acids and salts

Question 5

In filtration, what are unable to filter through the glomerulus and the Bowman’s capsule?

Answer 5

Plasma proteins, blood cells and platelets are too large to be filtered. Therefore, it does not enter the Bowman’s capsule

Question 6

In reabsorption, reabsorption removes useful substances from the filtrate and brings it back to the blood for reuse in the body. The useful substances are..

Answer 6

Sodium, nutrients, ions and water which is absorbed from the filtrate

Question 7

In reabsorption, __% of the useful substances are absorbed from the filtrate in the proximal tubule and is retuned to the body for reuse. What is the % amount?

Answer 7

65%

Question 8

What is the formula to calculate the amount of solute exerted?

Answer 8

Amount filtered - amount reabsorbed + amount secreted = amount of solute exerted

Question 9

In secretion, secretion removes additional..

Answer 9

waste and excess substance from blood from efferent arteriole to the filtrate in the nephron. This mainly takes place in the distal tubule

Question 10

In secretion, secretion usually takes place in..

Answer 10

takes place mainly in the distal tubule

Question 11

In water reabsorption, it removes water from the filtrate and returns it back to the blood. This takes place where?

Answer 11

In the loop of Henle

Question 12

When our body exert urine, our urine contains substances that has gone through..

Answer 12

glomerular filtration and tubular secretion

Question 13

Filtrate contains : water, urea, glucose, amino acids and salts

Urine contains : ?

Answer 13

water, urea, salts, uric acid and minerals