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 121–150 of 256121.Sensory receptors in the skin that detect touch are called: 122.The chemical messengers secreted by endocrine glands are called: 123.The main coordinating center of the body is the: 124.Which plant hormone inhibits growth and promotes dormancy? 125.The hormone that regulates the basal metabolism rate in the body is: 126.Root growing downwards into the soil is an example of: 127.The cerebrum is the part of the brain responsible for: 128.Which of the following is a tropic movement? 129.The hormone insulin is secreted by the: 130.Touching a hot object and immediately withdrawing the hand is an example of: 131.The functional unit of the nervous system is the: 132.Which plant hormone promotes fruit ripening? 133.Deficiency of iodine in the diet can lead to: 134.Which of the following is an involuntary action? 135.Which gland is known as the master gland? 136.The growth of pollen tubes towards ovules is an example of: 137.The gap between two neurons is called a: 138.The plant hormone responsible for cell elongation in shoots and phototropism is: 139.Which of the following is a component of the reflex arc? 140.The main function of the human brain is to: 141.The two main systems of control and coordination in higher animals are: 142.The regulation of blood pressure and heart rate during an emergency is mainly controlled by: 143.Which of the following is an example of a tropic movement in plants? 144.Plants use hormones for: 145.Which hormone is secreted by the pituitary gland to control the growth of bones and muscles? 146.When you touch a hot object, your hand immediately pulls away. This action is coordinated by the: 147.The ability to write, speak, and solve problems is controlled by the: 148.Which plant hormone delays the aging of leaves? 149.The growth of a tendril around a support is due to a differential growth rate between the side in contact with the support and the side away from the support. This is: 150.If the optic nerve is damaged, which sensation will be affected?