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Questions and Answers
Which organs are primarily responsible for excretion in vertebrates?
Which organs are primarily responsible for excretion in vertebrates?
- Eyes, ears, and nose
- Lungs, kidneys, and skin (correct)
- Heart, liver, and brain
- Stomach, intestines, and pancreas
What is the main waste product excreted by mammals?
What is the main waste product excreted by mammals?
- Urine (correct)
- Salts
- Water
- Carbon dioxide
How do unicellular organisms excrete waste products?
How do unicellular organisms excrete waste products?
- Directly through the surface of the cell (correct)
- Through their respiratory system
- Through their reproductive system
- Through their digestive system
What are the waste products produced during cellular respiration in the body?
What are the waste products produced during cellular respiration in the body?
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What is the harmful consequence of the accumulation of metabolic waste beyond a certain level in the body?
What is the harmful consequence of the accumulation of metabolic waste beyond a certain level in the body?
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Study Notes
Excretory Organs
- Kidneys, liver, lungs, and skin are primarily responsible for excretion in vertebrates, with kidneys being the primary excretory organs.
Waste Product Excreted by Mammals
- Urea is the main waste product excreted by mammals, produced in the liver and excreted through the kidneys.
Unicellular Organisms
- Unicellular organisms excrete waste products directly through their cell membranes, without the need for specialized excretory organs.
Waste Products of Cellular Respiration
- Carbon dioxide and lactic acid are the waste products produced during cellular respiration in the body, which need to be excreted to maintain homeostasis.
Consequences of Waste Accumulation
- The accumulation of metabolic waste beyond a certain level in the body can lead to harmful consequences, including acidosis, toxicity, and disease.
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