10th Class Biology – Short Questions & Answers
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Define dialysis.
Dialysis is a medical procedure that artificially removes waste products and excess fluid from the blood when the kidneys are not functioning properly.
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What is the role of sweat glands in temperature regulation?
Sweat glands help cool the body by releasing sweat onto the skin’s surface, where it evaporates, dissipating heat and lowering body temperature.
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Discuss the structure and function of the human excretory system.
The human excretory system includes the kidneys, ureters, bladder, and urethra. It filters blood to remove waste products, regulates water and salt balance, and maintains pH levels. The kidneys are the main organs responsible for filtration.
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Explain the process of urine formation in humans.
Urine formation occurs in three stages: filtration (blood is filtered in the glomerulus), reabsorption (valuable substances are reabsorbed into the blood from the renal tubules), and secretion (additional waste products are added to the urine).
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Describe the mechanisms involved in thermoregulation in humans.
Thermoregulation in humans involves behavioral and physiological responses. These include vasodilation and vasoconstriction to regulate heat loss, sweating for cooling, and shivering to generate heat when cold.
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Define coordination in biology.
Coordination in biology refers to the regulation and integration of different biological processes within an organism to ensure its functions are harmonious and efficient.
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What is the role of the nervous system?
The nervous system controls and coordinates body functions, responding to stimuli through electrical impulses and regulating activities like movement, thought, and sensation.
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Explain the function of neurons.
Neurons are specialized cells that transmit electrical signals, enabling communication between different parts of the body. They play a key role in sensory perception, motor control, and cognition.
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What is a synapse?
A synapse is the junction between two neurons, where electrical signals are transmitted through the release of neurotransmitters.
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Define reflex action.
Reflex action is an involuntary, rapid response to a stimulus, typically mediated by the spinal cord, bypassing the brain for quick action.
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