Chapter 4: Excretion – The Waste-Disposing System — Online MCQ Test
BIOLOGY · CLASS 10th · Telangana State Board
Practice Chapter 4: Excretion – The Waste-Disposing System with a free chapter-wise online MCQ test.
This chapter covers: Diving into metabolic waste removal this chapter focuses on how organisms maintain homeostasis. It details the anatomy of the human excretory system specifically the internal struc....
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Chapter 4: Excretion – The Waste-Disposing System — Important Questions & Answers
What is the main function of the human excretory system?
- A. To digest food
- B. To remove metabolic wastes from the body
- C. To transport oxygen
- D. To produce hormones
Answer: B. To remove metabolic wastes from the body
The excretory system removes metabolic wastes like urea and maintains internal balance in the body.
The excretory system removes metabolic wastes like urea and maintains internal balance in the body.
Which part of the kidney is the basic structural and functional unit?
- A. Neuron
- B. Alveolus
- C. Nephron
- D. Villus
Answer: C. Nephron
Each kidney is made up of many nephrons, and each nephron carries out urine formation.
Each kidney is made up of many nephrons, and each nephron carries out urine formation.
Which process in the nephron involves the removal of useful substances like glucose and water from the filtrate back into blood?
- A. Filtration
- B. Reabsorption
- C. Secretion
- D. Evaporation
Answer: B. Reabsorption
Reabsorption takes back useful substances from the filtrate into the blood capillaries.
Reabsorption takes back useful substances from the filtrate into the blood capillaries.
A student says, 'Dialysis removes wastes from blood by passing it through a semipermeable membrane.' Which statement best explains why this works?
- A. Only red blood cells can pass through the membrane
- B. Small waste molecules pass out, while blood cells and proteins are retained
- C. All blood components pass through equally
- D. The membrane converts wastes into useful substances
Answer: B. Small waste molecules pass out, while blood cells and proteins are retained
In dialysis, small molecules like urea diffuse out through a semipermeable membrane, while larger components remain in the blood.
In dialysis, small molecules like urea diffuse out through a semipermeable membrane, while larger components remain in the blood.
Which of the following is the most correct comparison between excretion in humans and in plants?
- A. Humans excrete wastes through kidneys, while plants store some wastes as gums, resins, and alkaloids
- B. Humans store wastes as gums, while plants use kidneys
- C. Both humans and plants use nephrons
- D. Plants produce urea as a major excretory product
Answer: A. Humans excrete wastes through kidneys, while plants store some wastes as gums, resins, and alkaloids
Humans have specialized excretory organs, whereas plants often store or eliminate wastes as secondary metabolites like gums and resins.
Humans have specialized excretory organs, whereas plants often store or eliminate wastes as secondary metabolites like gums and resins.