Case Study Questions for Class 10 Science Chapter 7 Control and Coordination

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Home CBSE Class 10 Science Case Study Questions for Class 10 Science Case Study Questions for Class 10 Science Chapter 7 Control and Coordination

Case Study Questions for Class 10 Science Chapter 7 Control and Coordination

Question 1:

Read the case/passage and answer the questions given below.

To carry out a simple function such as eating food there has to be coordination of the eyes, hands and the mouth. The eyes have to focus on the food, the hands have to pick it up and take it to the mouth where it will be chewed. All these actions have to be coordinated in such a manner that they follow a particular sequence and the action is completed. A similar mechanism is also needed for internal functions of the body. This function is carried out by the nervous system. It is composed of
(a) Specialised cells which can detect, receive and transmit different kinds of stimuli. These are called neurons.
(b) Nerve fibres which are certain bundles of extended processes of nerve cells.

The individuals also have to adjust to the changing conditions around them and vary their responses. At the same time, the internal conditions of the body should be maintained constant. This is called homeostasis. The internal conditions of the body are maintained at a constant by controlling the physiology of the organisms.

(i) What will the correct sequence in which conduction of information through nerves take place?
(ii) How homeostasis is said to maintain the equilibrium of the body?
(iii) What function does the central nervous system perform?
(iv) What happens when the dendrite tip of a nerve cell receives a signal?

Show Answer Answer: (i) Dendrites → Cell body → Axon → Nerve endings at the tip of axon → Synapse → Dendrite of next neuron
(ii) Homeostasis helps in keeping the constant internal environment within a cell or a body and hence maintains the equilibrium of the body.
(iii) The central nervous system is comprised of the brain and the spinal cord which process the information received from the receptors on/in the body.
(iv) Upon receiving a signal, the dendrite tip of a nerve cell sets off a chemical reaction which creates an electrical impulse in the them.

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