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Test: Excretion - Class 10 MCQ


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10 Questions MCQ Test Science Class 10 - Test: Excretion

Test: Excretion for Class 10 2024 is part of Science Class 10 preparation. The Test: Excretion questions and answers have been prepared according to the Class 10 exam syllabus.The Test: Excretion MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Excretion below.
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Test: Excretion - Question 1

In what plant structures are many waste products stored for eventual disposal?

Detailed Solution for Test: Excretion - Question 1
Many plant waste products are stored in old xylem tissues for eventual disposal. Xylem, which is responsible for transporting water and nutrients throughout the plant, also serves as a storage site for various waste substances. This storage mechanism helps plants manage waste materials effectively and maintain their overall health and function.
Test: Excretion - Question 2

How do plants primarily excrete waste substances into the soil surrounding them?

Detailed Solution for Test: Excretion - Question 2
Plants excrete some waste substances into the soil around them by storing waste products as resins and gums, particularly in old xylem. This method of waste excretion helps plants to rid themselves of certain waste materials while also contributing to the ecosystem through the release of these substances into the soil.
Test: Excretion - Question 3

How does the process of dialysis in an artificial kidney differ from the natural kidney's filtration mechanism?

Detailed Solution for Test: Excretion - Question 3
Unlike the natural kidney's filtration mechanism, dialysis in an artificial kidney does not involve re-absorption of waste products back into the blood. Instead, the waste products are removed from the blood through the dialysing fluid, without the re-absorption process seen in the kidney tubules. This distinction highlights the unique method through which an artificial kidney functions to cleanse the blood of toxins.
Test: Excretion - Question 4
How does an artificial kidney function in removing nitrogenous waste products from the blood through dialysis?
Detailed Solution for Test: Excretion - Question 4
An artificial kidney works by employing a system of tubes with a semi-permeable lining that are immersed in a tank filled with dialysing fluid. As the patient's blood passes through these tubes, waste products diffuse into the dialysing fluid, effectively removing nitrogenous wastes from the blood. This process mimics the natural function of the kidneys in filtering the blood and maintaining the body's internal balance.
Test: Excretion - Question 5
What controls the urge to urinate in humans?
Detailed Solution for Test: Excretion - Question 5
The urge to urinate is under the control of the nervous system in humans. The bladder, being a muscular organ, is influenced by nervous signals that allow individuals to regulate and control the timing of urination based on environmental and physiological factors.
Test: Excretion - Question 6
Which organ in the human body stores urine until it is ready to be excreted?
Detailed Solution for Test: Excretion - Question 6
The urinary bladder in the human body stores urine until the pressure from the expanded bladder triggers the urge to pass it out through the urethra. It acts as a reservoir for holding urine until it is convenient to release it from the body.
Test: Excretion - Question 7
How is urine produced in the human body?
Detailed Solution for Test: Excretion - Question 7
Urine is produced in the kidneys through a filtration process that removes waste products from the blood. The kidneys play a crucial role in filtering out nitrogenous waste such as urea or uric acid from the blood, which eventually forms urine.
Test: Excretion - Question 8
What strategy do complex multicellular organisms typically employ to remove harmful metabolic wastes?
Detailed Solution for Test: Excretion - Question 8
Complex multicellular organisms typically use specialized organs to remove harmful metabolic wastes from their bodies. These organs, such as the kidneys in humans, are specifically designed to filter and eliminate waste products from the bloodstream while maintaining the body's internal balance. By concentrating and excreting waste materials through these specialized organs, multicellular organisms can efficiently manage their metabolic byproducts and maintain homeostasis.
Test: Excretion - Question 9
What is the biological process involved in the removal of harmful metabolic wastes from the body?
Detailed Solution for Test: Excretion - Question 9
Excretion is the biological process involved in the removal of harmful metabolic wastes from the body. It is essential for maintaining internal balance and ensuring the proper functioning of various bodily systems. Through excretion, organisms eliminate waste products such as urea, ammonia, and carbon dioxide, which are byproducts of metabolic processes. This process helps in preventing the accumulation of toxic substances in the body, ensuring overall health and well-being.
Test: Excretion - Question 10
What is a unique strategy plants use to get rid of excess water?
Detailed Solution for Test: Excretion - Question 10
Plants utilize transpiration as a mechanism to eliminate excess water. Through transpiration, plants release water vapor from their leaves, which helps in regulating water content within the plant and also aids in nutrient uptake. This process is crucial for maintaining water balance in plants.
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