The nerves of the whole body join in the form of a bundle on the way to the brain through the spinal cord, which is called reflex arc. The response to a sensation is informed by this reflex arc to the brain. It is reconsidered by the brain.

What is the role of the brain in reflex action ?

What is the difference between the movement in the mimosa plant and the mode of movement in our leg?

Compare and contrast the neural and hormone mechanisms of action for control and co-ordination in animals.

How are involuntary actions and reflex actions different from each other?

What is the need for a system of control and co-ordination in an organism?

How does chemical co-ordination take place in plants?

Which signals will get disrupted in case of a spinal cord injury?

How does phototropism occur in plants?

Draw the structure of a neuron and explain its function.

What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?

The brain is responsible for : (a) Thinking. (b) Regulating the heartbeat. (c) Balancing the body. (d) All of the above.

The gap between two neurons is called a : (a) Dendrite. (b) Synapse. (c) Axon. (d) Impulse.

Which of the following is a plant hormone? (a) Insulin (b) Thyroxine (c) Estrogen (d) Cytokinin

Why are some patients of diabetes treated by giving injections of insulin?

How does our body respond when adrenaline is secreted into the blood?

Why is the use of iodised salt advisable?

How does chemical co-ordination take place in animals?

Design an experiment to demonstrate hydrotropism.

How do auxins promote the growth of a tendril around a support?

Give an example of a plant hormone that promotes growth.

How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

What is Plant Hormone?

How do we detect the smell of an agarbatti (incense stick) ?

Which part of the brain maintains posture and equilibrium of the body ?

What happens at the synapse between two neurons ?

What is the difference between reflex action and walking ?

Chapter 6 NCERT Class 10 Science SOLUTIONS

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