Biology · Class 11 · Chapter 18
Neural Control and Coordination
11 lessons 86 min 3 simulations
This chapter explains how the neural system keeps the organs of the body working together. It starts with what coordination means, compares neural organisation in Hydra, insects and vertebrates, and splits the human neural system into its central and peripheral parts. It then describes the neuron, shows how ion gradients make the resting potential, how a stimulus creates an action potential that travels along the axon, and how the impulse crosses a synapse. It ends with the parts of the brain and what each part controls.
What the exam asks
NEET asks for the ion picture of the resting membrane (more K⁺ and negative proteins inside, more Na⁺ outside; the pump moves 3 Na⁺ out for 2 K⁺ in), the order of events in an action potential (Na⁺ rushes in, polarity reverses, K⁺ leaves to restore it), the steps at a chemical synapse, neuron types with their locations, and which brain part does what (hypothalamus for temperature, hunger and thirst; medulla for breathing, cardiovascular reflexes and gastric secretion; corpus callosum joining the hemispheres). Marks are lost by reversing the pump ratio, by saying K⁺ rushes in during depolarisation, by calling electrical synapses slower, and by placing the pons or cerebellum in the forebrain.
Lessons
11 lessons · 86 min
1CoordinationNCERT §18 (opening)6 min2Neural system in animalsNCERT §18.16 min3Human neural systemNCERT §18.26 min4Structure of a neuronNCERT §18.37 min5Resting potentialNCERT §18.3.19 min 1 sim6Nerve impulseNCERT §18.3.110 min 1 sim7Transmission of impulsesNCERT §18.3.210 min 1 sim8The brainNCERT §18.46 min9ForebrainNCERT §18.4.16 min10Midbrain and hindbrainNCERT §18.4.2–18.4.36 min11Chapter reviewMust-know facts, traps and formulas14 min