Control and Coordination
Karnataka Board · Class 10 · Science
Flashcards for Control and Coordination — Karnataka Board Class 10 Science. Quick Q&A cards covering key concepts, definitions, and formulas.
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A student accidentally touches a hot iron. Their hand jerks away immediately without thinking. What type of action is this and how long does it take?
Answer
This is a reflex action. It takes only 0.1-0.5 seconds because the signal travels through the spinal cord directly to muscles without involving the brain. This quick response prevents severe burns and…
Why do our pupils become smaller in bright light and larger in dim light?
Answer
This is a reflex action controlled by the iris muscles. In bright light, circular muscles contract to make pupils smaller, protecting the retina. In dim light, radial muscles contract to make pupils l…
What happens when you eat food while having a blocked nose due to cold?
Answer
Food tastes bland or different because taste and smell work together. The nose detects aromatic compounds that enhance flavor. When blocked, only basic tastes (sweet, salty, bitter, sour) from tongue …
How does a nerve impulse travel from one neuron to another?
Answer
1. Electrical impulse reaches the axon end of first neuron 2. This triggers release of chemical messengers (neurotransmitters) 3. Chemicals cross the synapse (gap between neurons) 4. Neurotransmitters…
What is a synapse and why is it important?
Answer
A synapse is the gap between two neurons where electrical signals are converted to chemical signals. It's important because: 1) It ensures one-way transmission of impulses, 2) Allows signal processing…
A person suffers a head injury and loses balance while walking. Which part of the brain is likely damaged?
Answer
The cerebellum in the hind-brain is likely damaged. The cerebellum controls: 1) Balance and posture, 2) Coordination of voluntary movements, 3) Precision of actions like walking in a straight line, wr…
Why does the brain need protection and how is it protected?
Answer
The brain controls all body functions and is very delicate. Protection includes: 1) Skull (bony box) for external protection, 2) Cerebrospinal fluid acts like a shock absorber, 3) Meninges (protective…
What happens when you touch a 'touch-me-not' plant (chhui-mui) and how is this different from animal movement?
Answer
The leaves fold and droop immediately due to rapid water loss from cells at the base of leaves. Unlike animals: 1) No nervous system involved, 2) Uses water pressure changes instead of muscle contract…
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Sources & Official References
- Karnataka SSLC — kseeb.kar.nic.in
- Dept of Pre-University Education, Karnataka
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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