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प्रश्न
“Nervous and hormonal systems together perform the function of control and coordination in human beings.” Justify the statement.
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उत्तर
In human beings, control and coordination are brought about by both the nervous system and endocrine system. The nervous system works by the generation and transmission of electrical impulses while the endocrine system works by secreting chemical messengers called hormones. These systems complement the action of each other to control and coordinate different functions in our body. For example, when an emergency stimulus is detected by the nervous system, the stimulus is received and analyzed by the central nervous system that sends messages to effectors to provide a proper response. At the same time, the sympathetic nervous system activates the adrenal gland to release adrenaline that prepares the body by increasing heart rate, blood pressure, respiration and dilates the pupil, etc. Thus, both these systems interact and work together to produce an effective response.
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संबंधित प्रश्न
| The organ A which is located inside the skull of our body is protected by a bony box B and it is surrounded by three membranes C. The space between the membranes is filled with a liquid D which protects the organ A from mechanical shocks. The organ A in combination with another organ E makes up the central nervous system. |
- What is organ A?
- What are B, C and D?
- Name the organ E.
- While walking barefooted, 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?
- If we step out from a darkened room into bright sunshine, 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.
State whether the following statement is true (T) or false (F):
The pigment melanin is present in inner layers of skin epidermis.
What are sense organs?
Write one word in the space provided to complete the second pair of the related words pertaining to the nervous system.
Memory: cerebrum:: breathing:
Balance: cerebellum:: reasoning:
State whether the following statement is true (T) or false (F):
Each neuron consists of three parts called cell body, cyton, and axon.
Find the odd-one-out, giving reasons:
Axon, cell body, dendrite, cerebellum
Choose the correct answer.
Number of cranial nerves _____________
Differentiate between:
Cerebrum and Cerebellum.
Name the following:
The dorsal root ganglion of the spinal cord contain cell bodies of which type of neurons.
Give Technical Term:
The neuron which conducts impulse from the central nervous system to the organs.
Choose the Odd One Out:
Complete the following sentence with appropriate Word
The ventral root ganglion of the spinal cord contains cell bodies of the:
Which cells of PNS secrete myelin sheath around the nerves?
The outermost of the three cranial meninges are ______
Identify the CORRECT sequence of meninges. (From inside to outside)
Which of the following statement is correct about the node of Ranvier?
Complete the following table:
| No. | Name of Nerve | Type of Nerve | Function |
| 1. | Optic | ||
| 2. | Facial | ||
| 3. | Hypoglossal | ||
| 4. | Trigeminal | ||
| 5. | Auditory | ||
| 6. | Glossopharyngeal |
Trace the sequence of events which occur when you suddenly touch a hot object.
