Class 10 Science - Chapter Control and Coordination NCERT Solutions | How are involuntary actions and reflex a

Draw the structure of a neuron and explain its function.

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

How does chemical coordination take place in animals?

Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.

Why is the use of iodised salt advisable?

The brain is responsible for

(a) thinking.
(b) regulating the heart beat.
(c) balancing the body.
(d) all of the above.

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

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

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

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

Did Döbereiner’s triads also exist in the columns of Newlands’ Octaves? Compare and find out.

What is a good source of energy?

Why is diffusion insufficient to meet the oxygen requirements of multi-cellular organisms like humans?

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

What changes can you make in your habits to become more environment-friendly?

What is the importance of DNA copying in reproduction?

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Why should a magnesium ribbon be cleared before burning in air?

Define the principal focus of a concave mirror.

You have been provided with three test tubes. One of them contains distilled water and the other two contain an acidic solution and a basic solution, respectively. If you are given only red litmus paper, how will you identify the contents of each test tube?

Name two metals which are found in nature in the free state.

What are the advantages of connecting electrical devices in parallel with the battery instead of connecting them in series?

What are the differences between autotrophic nutrition and heterotrophic nutrition?

Why is sodium kept immersed in kerosene oil?

What are amphoteric oxides? Give two examples of amphoteric oxides.

What are the different ways in which glucose is oxidised to provide energy in various organisms?

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?

How does the creation of variations in a species promote survival?

What are the limitations of extracting energy from—

   (a) the wind?          (b) waves?          (c) tides?

You are given kerosene, turpentine and water. In which of these does the light travel fastest? Use the information given in Table 10.3.