Biology
Define the terms :
(a) Coordination
(b) Synapse
(c) Impulse
(d) Reflex action
(e) Reflex arc
Answer
(a) Coordination — The interlinking of various activities and organs of a living being as per the needs of the body internally or externally is called coordination.
(b) Synapse — A synapse is a small junction used for communication between two neurons.
(c) Impulse — A wave of electrical disturbance that runs through the nerves.
(d) Reflex action — Reflex action is the quick, immediate and automatic response to a stimulus without the involvement of the brain.
(e) Reflex arc — The shortest pathway of the nerve impulse from a receptor to the effector which makes a reflex action possible is called a reflex arc.
Related Questions
Draw a neat and labeled diagram of a neuron and answer the following questions :
(a) What are the two main parts of a neuron?
(b) Is this structure unicellular or multicellular?
(c) Which part of the neuron contains nucleus?
(d) Name the two parts of the human body where neurons are found abundantly.
(e) How are neurons significant to us?
With the help of a suitable example, describe reflex action.
Briefly differentiate between the following by giving examples:
Voluntary and involuntary action.
Briefly differentiate between the following by giving examples:
Inborn and acquired reflexes.