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प्रश्न
Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.
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उत्तर
| Nervous System Mechanism | Hormonal System Mechanism |
| It consists of nerve impulses between the PNS, CNS and Brain. | It consists of the endocrine system, which secretes hormones directly into the blood. |
| The axons and dendrites transmit the information through a coordinated effort. | The information is transmitted or transported through blood. |
| The flow of information is rapid and the response is quick. | The information travels slowly and the response is slow. |
| Nerve impulses are not specific in their action. | Each hormone has specific actions. |
| The effects are short-lived. | It has prolonged effects. |
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संबंधित प्रश्न
Differentiate between voluntary and involuntary movements.
Draw the structure of a neuron.
What are the main organs of the human nervous system? Draw a labelled diagram to show the main organs of the human nervous system.
The organ A which is located inside the skull of our body is protected by a bony shell B. It is surrounded by three layers membranes C. The spaces between these layers are filled with a liquid D which protects organ A from mechanical shocks. Organ A in combination with another organ E makes up the central nervous system.
(a) What is organ A?
(b) What are B, C and D?
(c) Name the organ E.
(d) While walking barefoot, if we happen to step on a sharp piece of stone, we immediately lift our foot up. Which of the two organs: A or E, is directly involved in this action?
(e) If we step out from a darkened room into bright sunlight, we close our eyes for a moment. Which of the two organs: A or E, is directly involved in this action?
Name the two types of coordination which take place in our body.
Compare the nervous system and the endocrine system.
Find the odd-one out, giving reasons:
Pinna, eardrum, cochlea, ear canal
Name three major divisions of the human nervous system.
Define the term:
Sensory neuron
Given below is a certain structure. Write against them its functional activity.
Olfactory nerve and ______.
Explain the term: Mixed nerve
Explain the Term: Ganglion
Give Technical Term:
The neuron which conducts impulse from the central nervous system to the organs.
Short answer question
Rakesh got hurt on his head when he fell down from his motorbike. Which inner membranes must have protected his brain? What other roles do they have to play?
‘Injury to the medulla oblongata causes sudden death’ Explain.
Distinguish between
Sympathetic and parasympathetic nervous system.
What is the amount of CSF present in and around the CNS?
Identify the motor nerves.
What constitutes the central and peripheral nervous systems? How are the components of central nervous system protected?
