Question

1)mention four reflex action
2)name emergency hormone
3)define impulses

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Answer 1

Taking hand when touch an hot object,blinking eyes,coughing when dust enters in our nose, jumping when we hear crackers noise ! 2) Adrenalin 3) Impulses are chemical substances that travels in the form of messages in the dentrites and later turns into transmitters at the synapse!!

Answer 2

1. Blinking, coughing, touching a hot object, jumping due some sudden loud noise

2.adrenalin

3. when a force f acts on a body for a period of time t, then the product of force and time is known as impulse.