Lesson 5.1.2a
5.1.2a Excretion and the liver Quiz: OCR Biology, Unit 5
20 questions
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Lesson 5.1.2a, Excretion and the liver: 20 multiple choice questions for the OCR Biology (H020), Unit 5: Communication and homeostasis, written with Revision Ninja.
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The 20 questions
-
What is the term for removing metabolic waste products from the body?
- Excretion
- Secretion
- Egestion
- Assimilation
-
Which metabolic waste is excreted mainly by the lungs?
- Urea
- Carbon dioxide
- Glucose
- Sodium chloride
-
Which nitrogenous waste product is formed in the liver from ammonia?
- Creatine
- Glycogen
- Urea
- Bilirubin
-
Which molecule is glucose converted into for storage in the liver?
- Glycerol
- Glycogen
- Starch
- Glucagon
-
Which metabolic pathway in liver cells converts toxic ammonia into urea?
- Krebs cycle
- Calvin cycle
- Glycolysis
- Ornithine cycle
-
What metabolic role does the liver perform when breaking down alcohol and drugs?
- Glucogenesis
- Detoxification
- Deamination
- Emulsification
-
Why must metabolic waste products such as urea be removed from the body?
- They digest lipids
- They raise pH
- They store energy
- They are toxic
-
A patient's liver is damaged and cannot form urea. Which substance is most likely to build up in the blood?
- Urea
- Ammonia
- Oxygen
- Glucose
-
If liver function is impaired, which key homeostatic process for clearing toxins is reduced?
- Detoxification
- Deamination
- Egestion
- Ultrafiltration
-
What is the main purpose of drawing stained liver tissue observed under a microscope?
- Test enzyme activity
- Record cellular structures
- Determine cell pH
- Measure tissue mass
-
What effect does excess carbon dioxide retention have on blood pH?
- Fluctuates blood pH
- Raises blood pH
- Lowers blood pH
- Keeps pH neutral
-
Why does the human liver convert toxic ammonia into urea before excretion?
- Urea is less toxic
- Urea is a lipid
- Ammonia is insoluble
- Ammonia is a polymer
-
In which carbohydrate form does the liver store excess glucose?
- Maltose
- Starch
- Glucagon
- Glycogen
-
What type of waste material is removed from the body during excretion?
- Dietary fibre
- Undigested food
- Pathogenic bacteria
- Metabolic waste
-
Which process converts excess amino acids into ammonia in the liver?
- Deamination
- Transamination
- Hydrolysis
- Decarboxylation
-
What toxic substance accumulates in the body if the ornithine cycle slows?
- Glutamine
- Ammonia
- Urea
- Uric acid
-
Which organ excretes the soluble toxins produced by liver detoxification?
- Kidneys
- Lungs
- Gallbladder
- Pancreas
-
Which nitrogenous waste is excreted mainly by the kidneys rather than the lungs?
- Water vapour
- Carbon dioxide
- Urea
- Oxygen
-
What process converts ammonia into urea within liver cells?
- Calvin cycle
- Ornithine cycle
- Krebs cycle
- Nitrogen cycle
-
Which organ produces urea from nitrogenous waste before its excretion?
- Spleen
- Kidney
- Liver
- Bladder
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