English Medium इयत्ता १० - CBSE Important Questions for Science

What is the role of the brain in reflex action?

Name the function of cerebrum.

Define the following:

Reflex arc

List in tabular form two differences between reflex action and walking. 

List in tabular form three distinguishing features between cerebrum and cerebellum.

Nervous and hormonal systems together perform the function of control and coordination in human beings. Justify this statement with the help of an example.

Name the parts (a) to (e) in the following diagram.

What is the term given to the sequence of events occurring in the diagram?

Plants do not have any nervous system but yet, if we touch a sensitive plant, some observable changes take place in its leaves. Explain how could this plant respond to the external stimuli and how it is communicated.

In a synapse, the chemical signal is transmitted from ______.

How is the mode of action in beating of the heart different from reflex actions? Give four examples.

How is an electric impulse created in human nervous system? 

Identify the parts of a neuron which help the nerve impulse to travel towards the cell body.

Identify the parts of a neuron which help the nerve impulse to travel away from the cell body.

Name the hormone secreted in scary situations by animals. Write any three responses which enable the animal body to deal with it.

Sensory nerve of a reflex arc carries information from the receptor cells to the ______.

We are advised to take iodised salt in our diet by doctors. Justify its importance in our bodies.

A doctor has advised Sameer to reduce sugar intake in his diet and do regular exercise after checking his blood test reports. Which disease do you think Sameer is suffering from? Name the hormone responsible for this disease and the organ producing the hormone.

Why have reflex arcs evolved in animals? 

Trace the sequence of events which occur when you suddenly touch a hot object.

Name the parts labelled as A, B, C and D in the diagram given below:-