Control and Coordination short answer questions 3 marks pyqs for class 10 cbse students

Control and Coordination short answer questions 3 marks pyqs for class 10 cbse students

Here are 50 short-answer questions (3 marks each) from the chapter "Control and Coordination," based on previous CBSE Class 10 board examinations. Nervous System & Reflex Action What is a synapse? What happens at the synapse between two neurons? How are messages carried across it? A synapse is the junction between the axon terminal of one neuron and the dendrite of the next. When an electrical impulse reaches the axon terminal, it triggers the release of chemical messengers called neurotransmitters . These neurotransmitters diffuse across the gap (synaptic cleft) and bind to receptors on the dendrite of the next neuron, initiating a new electrical impulse. Define reflex action. Draw a flowchart showing the sequence of events that occur during a reflex action like sneezing. A reflex action is a rapid, automatic, and involuntary response to a stimulus, not under the conscious control of the brain. Flowchart for Sneezing: Stimulus: Irritant enters the nose (e.g., dust, pollen). ➡️ Re…