WorksheetsIGCSE Unit 13 - Excretion in Humans
Total questions: 34
Worksheet time: 19mins
Adjective pertaining to the kidneys (as in pulmonary pertains to lungs and cardiac for the heart)
(a)
What substance is the urine of a person suffering from diabetes mellitus likely to contain?
amino acids
fatty acids
glucose
proteins
Which is not a function of the liver?
Produce urine
Deamination of amino acids
Break down toxins
Produce bile
Which diet will cause the liver to produce the most urea?
high carbohydrate, low fat
high fat, high fibre
high fat, low protein
high protein, low carbohydrate
Check the organs which are involved in excretion directly
Lungs
Skin
Heart
Kidney
Brain
Which labelled structure contains urine?
A
B
C
D
What do these results show?
Less water is lost from the kidneys on a cold day than on a hot day
More salt is lost from the kidneys on a hot day than on a cold day
The total amount of salt lost each day is the same
Water is not lost from the kidneys on hot days
In which order does urea pass through structures in the body?
A
B
C
D
Which is not a feature of the glomerulus?
tightly packed capillary network
carrier proteins present for active transport
partially-permeable
located inside the Bowman's capsule
Name structure D
(a)
What is structure D?
(a)
What is structure E?
(a)
What is the area A?
(a)
What is the area B?
(a)
What is the area C? (Extension)
(a)
What is structure E?
(a)
What is structure C?
(a)
What is structure B?
(a)
What is structure G?
(a)
What is structure F?
(a)
The diagram shows the structure of the filtering unit of a kidney. What is the name given to these filtering units?
(a)
Ultrafiltration occurs in which of these areas?
(a)
Reabsorption of glucose occurs in which of these areas?
(a)
Reabsorption of water and salts occurs in which of these areas?
(a)
Select those that are excreted by the kidneys
Excess water
Ions (salts)
Urea
Glucose
In which organ is urea produced?
(a)
What is the process by which excess amino acids are converted into ammonia and then urea (and other products)?
(a)
Which is true of waste products such as carbon dioxide and urea?
Toxic
Increase pH of blood
Are produced more during exercise
May compete with oxygen for binding sites on haemoglobin molecules
How can urine be used to diagnose diabetes?
There would be blood in the urine
There would be glucose in the urine
There would be proteins in the urine
There would be salt in the urine
Define the term excretion [3]
Describe the process of filtration in the kidney. [3]
How does a nephron ensure that useful substances such as glucose are reabsorbed but not urea? [2]
ADH is a hormone that stimulates the production of aquaporins in the collecting duct. Explain the conditions when ADH would be secreted [3]
Suggest why the presence of protein in urine is a major medical concern [2]
