Control and Coordination is the process by which living organisms respond to stimuli and maintain body balance.
In Animals:
- Nervous system (brain, spinal cord, nerves) controls quick actions.
- Endocrine system (hormones) controls slow, long-lasting changes.
- Neurons carry messages as electrical signals.
- Example: Moving hand away from hot object (reflex action).
In Plants:
- Use hormones (phytohormones) to respond to light, gravity, touch, etc.
- Example: Plant bends towards light due to auxin (phototropism).
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Questions on Control and Coordination
Showing 61–90 of 25661.What is the primary role of the motor neurons? 62.The response of a plant to gravity is called: 63.Which of the following is not a part of the human brain? 64.The feedback mechanism that regulates the secretion of hormones like thyroxine is typically: 65.Which of these is a plant hormone that promotes stem elongation and cell division? 66.What is the role of interneurons (relay neurons) in the reflex arc? 67.The specialized tip of a neuron that transmits signals to another neuron or an effector cell is the: 68.The thyroid gland secretes a hormone called: 69.Which plant hormone helps in the closing of stomata under water stress? 70.The growth of a root towards water is an example of: 71.Which part of the brain is the main control center for vision? 72.A sudden, involuntary response to a stimulus is called a: 73.The function of the gustatory receptors is to detect: 74.Which of the following statements describes the main difference between plant and animal hormones? 75.The condition characterized by abnormally high growth due to excess growth hormone is called: 76.Myelin sheath in neurons helps to: 77.What is the general direction of nerve impulse transmission within a neuron? 78.The ability of living organisms to respond to stimuli is called: 79.Which hormone is secreted by the adrenal medulla? 80.The part of the human brain that is responsible for our sense of hearing and smell is located in the: 81.The immediate cause of the leaves of the 'touch-me-not' plant drooping upon touching is: 82.The nervous system primarily uses ______________ signals, while the endocrine system primarily uses ______________ signals. 83.Which gland is responsible for secreting sex hormones in females? 84.The role of the Pons in the brain is to: 85.A plant stem growing towards light shows: 86.The main function of taste buds is to: 87.The outer protective layer of the brain is called the: 88.Which of the following statements about tropic movements is correct? 89.A person suffering from diabetes may be advised to take injections of: 90.The structure of the brain that connects the two cerebral hemispheres is the: