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Control and Coordination
Control and Coordination explains how the body of a plant or animal detects a change, processes that information, and produces a suitable response. In humans, the nervous system gives quick responses, while the endocrine system gives slower but longer-lasting control through hormones. In plants, coordination is mainly shown through tropic movements, where growth happens in a particular direction because of a stimulus. The chapter is important for board exams because it links body response, reflex action, hormones, and plant movement in a clear, application-based way.
Difficulty
Medium
Study time
80-100 min
Plan by time
Pick the window that matches what you have right now.
If you have 15 min
Last-pass revision
Skim the Quick Revision table — definitions, formulas, and the traps board examiners reuse.
Open Quick RevisionIf you have 45 min
Targeted practice
Read the high-priority concepts, then take the chapter MCQ quiz to find weak spots.
Start MCQ QuizIf you have 80 min
First full pass
Walk every concept in chapter order, then revise and quiz. Best for the first time you study this chapter.
Open Key ConceptsChapter Learning Map
Start with one of the buckets below, then open the full map when you want the complete concept roadmap.
Nervous System
Follow how a stimulus is detected, carried, and turned into a response.
Open mapHormonal Control
Revise slower chemical control through glands, hormones, and emergency response.
Open mapPlant Responses
See how plants respond through directional growth rather than movement from place to place.
Open mapKey Concepts
Concepts grouped the way the chapter is taught — open the bucket that matches what you want to revise.
Nervous System
high priorityFollow how a stimulus is detected, carried, and turned into a response.
Stimulus
A stimulus is any change in the surroundings or inside the body that can be detected and can produce a response.
Neuron
A neuron is a nerve cell that carries messages in the body in the form of electrical impulses.
Synapse
A synapse is the small gap between two neurons, or between a neuron and an effector, where the message passes from one cell to another.
Reflex Action
A reflex action is a quick, automatic response to a stimulus, usually controlled by the spinal cord for safety.
Hormonal Control
high priorityRevise slower chemical control through glands, hormones, and emergency response.
Pituitary Gland
The pituitary gland is a small endocrine gland at the base of the brain that controls several other endocrine glands and body functions.
Adrenaline
Adrenaline is a hormone released by the adrenal glands during fear, excitement, or emergency situations.
Plant Responses
medium prioritySee how plants respond through directional growth rather than movement from place to place.
Tropism
Tropism is the directional growth movement of a plant part in response to a stimulus.
Phototropism
Phototropism is the growth movement of a plant part in response to light.
Geotropism
Geotropism is the growth movement of a plant part in response to gravity.
Exam Intelligence
Use this section to decide what deserves the most revision time.
High Probability Topics
- Stimulus
- Neuron
- Reflex Action
- Synapse
- Hormone
- Pituitary Gland
- Adrenaline
- Tropism
Common Traps
- Confusing stimulus with response in everyday examples.
- Reversing dendrite and axon functions in a neuron.
- Saying the brain controls every reflex before the spinal cord.
- Thinking a synapse carries impulses like a metal wire without chemical transfer.
- Treating hormones as nerve impulses and forgetting blood transport.
- Calling the pituitary the only gland that controls the body alone.
- Mixing up adrenaline with digestion or rest hormones.
- Using tropism for any plant movement without checking directional growth.
Likely Question Types
- MCQ: concept checks, applications, and common mistakes
- Very short answer: definitions, formulas, or conditions
- Short answer: worked method, example, or reason-based explanation
- Case-based: chapter scenario with concept-linked subparts
Quick Revision
Concept, formula or equation to remember, and the trap that loses marks — in one scannable view.
- Nervous control is fast and uses neurons; hormonal control is slower and uses blood.
- Reflex action protects the body by giving a quick automatic response.
- Synapses ensure controlled transfer of messages between neurons.
- The pituitary gland plays a master role in controlling several other glands.
- Adrenaline prepares the body for emergency action.
- Plant responses are often growth responses called tropisms.
- Phototropism responds to light, while geotropism responds to gravity.
- Stimulus: A stimulus is any change in the surroundings or inside the body that can be detected and can produce a response.
Practice
Use short concept checks first, then move into the full chapter test.
Free Chapter MCQ Quiz
Try a 15-question quiz from this chapter. Get instant score and unlock concept-wise analytics.
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