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WorksheetsiGCSE Biology 2i: Human excretion
Total questions: 20
Worksheet time: 10mins
What is the definition of excretion?
The removal of waste molecules produced in metabolism
The storage of all molecules produced in metabolism
The removal of all molecules produced in metabolism
The storage of waste molecules produced in metabolism
Which blood vessel brings blood that is high in urea to the kidney?
Renal vein
Renal artery
Hepatic vein
Hepatic artery
What process is used to reabsorb water from the glomerular filtrate?
Active transport
Osmosis
Filtration
Diffusion
What is the name of the process where blood is filtered in the kidney under high pressure?
Ultrafiltration
Selective reabsorption
Active transport
Osmosis
By which process is glucose reabsorbed in the PCT?
Osmosis
Active transport
Diffusion
Low levels of ADH make the collecting duct:
More permeable > Increases urine production
Less permeable > Decreases urine production
More permeable > Decreases urine production
Less permeable > Increases urine production
What is the liquid called that the kidneys excrete?
Bile
Blood plasma
Glomerular filtrate
Urine
What is the name of the cup-shaped structure at the start of the nephron?
Bowman's capsule
Glomerulus
Proximal convoluted tubule
Distal convoluted tubule
The role of the Loop of Henle is:
Selective reabsorption
Ultrafiltration
Osmoregulation
Excretion
Which substances in the glomerular filtrate are reabsorbed back into the blood?
Urea and salts
Red blood cells and platelets
Glucose and amino acids
Water and plasma proteins
The hormone that controls osmoregulation is produced in which gland?
Pituitary
Adrenal
Thyroid
Pineal
The hormone that controls osmoregulation acts upon which part of the nephron?
PCT
Bowmans capsule
Loop of Henle
Collecting duct
What is the process called where useful substances are reabsorbed from the glomerular filtrate?
Selective reabsorption
Ultrafiltration
Active transport
Osmosis
When dehydrated ADH release:
Increases
Decreases
Stays the same
What is the name of the knot of capillaries inside the Bowman's capsule?
Nephron
Proximal convoluted tubule
Glomerulus
Renal pelvis
What is the name of the liquid that is filtered from the blood in the glomerulus?
Glomerular filtrate
Blood plasma
Urine
Urea
Which of the following would be too big to leave the glomerulus?
Glucose
Salt
Plasma proteins
Sodium
Which statement is correct regarding selective reabsorption?
All urea, some glucose and some salt are reabsorbed
No urea, all glucose and some salt are reabsorbed
All Urea, no glucose and no salt are reabsorbed
No Urea, no glucose and some salt are reabsorbed
Ultrafiltration happens due to:
Osmosis
Blood pressure
Diffusion
Active transport
Blood in the urine could be a symptom of:
An overactive hypothalamus
An ADH deficiency
Too much selective reabsorption of glucose
Damage to glomerula capillaries
