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WorksheetsExcretion
Total questions: 20
Worksheet time: 32mins
The waste products produced by cellular life processes the most important of which are carbon dioxide, water, urea and mineral salts.
ATP
metabolic wastes
feces
enzymes
A nitrogenous waste resulting from the breakdown of the amino acids produced during protein digestion.
carbon dioxide
bile
urea
water
A) Urine passes through the ureters
B) Urea enters the kidneys
C) Urine enters the urethra
Which substance is NOT found in the liquid in the highlighted parts of a healthy person?
Glucose
Salt
Water
Urea
The area influenced by hormones in order to regulate water balance in the body.
Loop of Henle
Proximal convoluted tubule
Distal convoluted tubule
Collecting duct
Which of these is found in larger quantities in the renal artery than in the renal vein.
glucose
urea
water
oxygen
carbon dioxide
Excretion
is the removal of urea only
is the removal of urine, faeces and sweat
is the removal of toxic substances, excess and waste products
is the removal of urine, salts and sweat
The process that reduces the volume of the kidney filtrate and returns substances (water, glucose, amino acids) to the blood.
reabsorption
perspiration
excretion
transport
Identify which statement(s) define the role of the kidneys in the excretory system.
Regulate water content in the blood
Metabolises drugs present in the blood
Excrete (remove) toxic waste products of metabolism
Detoxifies chemicals in the blood
Identify the correct statement(s) regarding Ultrafiltration in the kidneys.
Occurs in the Bowmans capsule
Is when molecules of water, protein and glucose pass out of the blood
Is when molecules of water, glucose and salts pass out of the blood
Is when small molecules pass out of the blood and are excreted from the body.
Is controlled by a hormone called ADH
The concentration of water in the blood is controlled by the kidneys in response to the presence of a hormone released from the brain. Select any of these actions that would alter the water potential/concentration of the blood plasma.
Consumption of fatty foods
Consumption of salty foods
Excess sweating
Excess consumption of water
Using certain medications (diuretics)
Identify the statement that correctly describes what happens when there is too little water in the blood.
Low solute concentration of blood plasma results in more ADH hormone therefore less water reabsorbed by the nephrons
Low solute concentration of blood plasma results in less ADH hormone therefore less water reabsorbed by the nephrons
High solute concentration of blood plasma results in more ADH hormone therefore more water reabsorbed by the nephrons
High solute concentration of blood plasma results in less ADH hormone therefore more water absorbed by the nephrons
What statement(s) are NOT examples of excretion?
release of a hormone into the blood
removal of carbon dioxide from the lungs
removal of undigested food from the alimentary canal
release of water from the sweat glands
The diagram represents the liver and associated blood vessels.
After a meal, how do the levels of glucose and urea in the blood change as the blood passes from X to Y?
decrease; decrease
decrease; increase
increase; decrease
increase; increase
Select the statement which best describes the excretion of excess protein from the body
The kidney converts excess protein (amino acids) into urea which is then excreted by the body
The liver converts excess protein (amino acids) into urea which is transferred to the kidney and excreted
Excess protein is filtered from the blood by the kidney and excreted in the urine
Protein levels in the blood are changed by the kidneys in response to the presence of a hormone called ADH.
The Bowman's capsule, glomerulus, and collecting duct are all part of the
nervous system
kidney
nephron
excretory system
