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Excretion and Organ Function Quiz

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Questions and Answers

What is the main purpose of excretion in organisms?

To regulate body temperature

To produce energy

To facilitate reproduction

To eliminate metabolic waste (correct)

Which organs are primarily responsible for excretion in vertebrates?

Heart, brain, and stomach

Lungs, kidneys, and skin (correct)

Intestines, gallbladder, and bladder

Liver, pancreas, and spleen

Which waste product is expelled through the urethra in mammals?

Carbon dioxide

Water

Urine (correct)

Salts

How do unicellular organisms discharge waste products?

<p>Directly through the surface of the cell</p> Signup and view all the answers

What are some waste products produced during metabolism?

<p>Carbon dioxide, water, salts, urea, and uric acid</p> Signup and view all the answers

Study Notes

Purpose of Excretion

Excretion is crucial for maintaining homeostasis by regulating the balance of fluids and electrolytes in organisms.
It removes toxic metabolic waste products to prevent harmful accumulation within the body.

Organs of Excretion in Vertebrates

Kidneys are the primary organs responsible for filtering blood and producing urine.
The urinary bladder stores urine before it is expelled from the body via the urethra.

Waste Product in Mammals

Urine, containing urea and other metabolites, is expelled through the urethra in mammals.

Waste Removal in Unicellular Organisms

Unicellular organisms, such as amoebas and paramecia, discharge waste products through passive diffusion or specialized structures like contractile vacuoles.

Metabolic Waste Products

Common waste products produced during metabolism include carbon dioxide, urea, ammonia, and creatinine.
Excess salts and water are also byproducts of metabolic processes that must be excreted to maintain balance.

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Description

Test your knowledge on excretion and the different organs involved in eliminating metabolic waste from organisms. Explore how excretion differs from secretion and understand the importance of this essential process in all forms of life.