Worksheet: Metabolism and the Liver
In this worksheet, we will practice defining metabolism, and describing the metabolic functions of the liver.
What waste product is formed during anaerobic respiration in humans?
- ACarbon monoxide
- CSulfuric acid
- DHydrochloric acid
- ELactic acid
Why is a period of intense exercise often followed by heavy breathing?
- ATo increase the temperature of the body
- BTo increase the heart rate
- CTo remove oxygen from the bloodstream
- DTo provide cells with energy
- ETo replace the oxygen lost
Which of the following best defines metabolism?
- AMetabolism is how quickly a person can lose weight.
- BMetabolism is how quickly the body digests a meal.
- CMetabolism is the total energy input divided by the total energy output of an organism.
- DMetabolism is the sum of the chemical reactions that occur in each cell of an organism.
- EMetabolism is the sum of all the energy lost from an organism.
Which metabolic reaction in plants uses light energy to produce glucose and oxygen?
What organ is organ X in the diagram?
- AGall bladder
The lactic acid that builds up in the body after anaerobic respiration is transported to the liver.
What sugar does the liver convert the lactic acid into?
Which of the following best describes what is meant by oxygen debt?
- AAn oxygen debt is the amount of oxygen lost in a 24-hour period.
- BAn oxygen debt is the amount of oxygen required after exercise to remove the lactic acid from the body.
- CAn oxygen debt is the amount of oxygen taken in by the muscles during exercise.
- DAn oxygen debt is the number of breaths taken during a period of intense exercise.
Why is it important that lactic acid be removed from the body after exercise?
- AIn high concentrations, lactic acid can build up in arteries and clog them.
- BLactic acid is poisonous and can cause blood poisoning.
- CLactic acid is toxic at high concentrations and can break down cell walls.
- DLactic acid is toxic at high concentrations and can cause muscle pain.
- EIn high concentrations, lactic acid can interact with stomach acid and lower the pH of the body.
In some metabolic reactions, large molecules are broken down into smaller ones.
What biological reaction breaks down glucose in cells to release energy?
Which biological molecules in the body break down to form urea?
- CNucleic acids
- EAmino acids
In some metabolic reactions, large molecules are made from smaller ones, as shown in the simple diagrams provided.
What monomer subunits join together to form starch in a metabolic reaction?
- EAmino acids
What monomer subunits join together to form a protein in a metabolic reaction?
- CAmino acids