Excretion PT2 Flashcards
What is the life span of a red blood cell?
About three months.
Where are red blood cells destroyed?
In the liver or spleen.
What is the function of haemoglobin in red blood cells?
Haemoglobin is a protein pigment that transports oxygen.
What happens to the excess protein portion of haemoglobin
It is broken down into excess amino acids and reused by the body.
How is iron from haemoglobin managed in the body?
The iron is extracted, stored, and may be reused later.
What happens to the remainder of haemoglobin after iron extraction?
It is broken down into bile pigments and excreted through bile into the gut and out with faeces.
Why are proteins essential in the diet?
Proteins are essential for various bodily functions and contain nitrogen.
What happens to the nitrogenous waste from protein breakdown?
It is converted to urea, which is removed by the kidneys during urine production.
What are the waste products of photosynthesis in plants?
Oxygen and water
How is oxygen, a waste product of photosynthesis, expelled from plants?
Oxygen is lost from the leaves through the stomata.
What happens to the water produced during photosynthesis?
It is either needed by the cells or lost through transpiration.
