Science Class 10
Control and Coordination
Explain how nerves and hormones keep many body parts working together.
13 lessons · ~93 min total
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Lessons in this topic
- 0 Start here A roadmap: nerve cells and their fast signal, the reflex that skips the brain, the brain and cord, hormones as a chemical message in the blood, blood sugar and feedback, plants that steer by chemistry, other plant hormones, and the two systems compared. · 5 min You are here
- 1 One body, many parts A body has many parts with different jobs. They must act together, in step, and two systems help them. · 7 min
- 2 The message and the messenger A neuron carries a signal as electricity, one way. At a synapse, the signal crosses as a chemical. · 8 min
- 3 The shortest path A reflex is a fast, automatic response. Its arc often closes in the spinal cord, so the muscle does not wait. · 8 min
- 4 The centre and the cable The brain has three parts: forebrain, midbrain and hindbrain. The cerebellum balances; the medulla runs blood pressure and more. · 8 min
- 5 Messages in the blood Hormones are chemical messengers from glands, carried by the blood: growth hormone, thyroxin, adrenaline. · 8 min
- 6 Sugar and feedback Insulin lowers blood sugar. Feedback keeps blood sugar steady: more sugar brings more insulin, then less. · 8 min
- 7 Checkpoint: nerves and hormones Six marked questions on coordination, neurons, reflexes, the brain, hormones and blood sugar. · 6 min
- 8 Plants bend toward the light Auxin gathers on the shaded side of a shoot, so it bends toward light. Roots grow down with gravity. · 8 min
- 9 Other plant hormones Gibberellins make stems grow longer. Cytokinins make cells divide. Abscisic acid slows growth. · 6 min
- 10 Fast and slow, side by side Nerves are usually fast and reach one place. Hormones are usually slower and reach many places. · 8 min
- 11 The big picture Nine rules, one page: neurons and synapses, the reflex arc, the three brain parts, hormones and their glands, blood sugar and feedback, plant tropisms, other plant hormones, and nerves compared with hormones. · 5 min
- 12 Track quiz One question on each rule — neurons, synapses, the reflex arc, brain parts, hormone glands, blood sugar, plant tropisms, plant hormones, and nerves compared with hormones. · 8 min
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