Question

Give 3 differences between nervous and hormonal information.

Answer 1

The biggest difference between the two is that the nervous system uses electrical impulses to send signals through neurones, whereas the hormonal system uses chemical messengers transported into blood plasma to target cells. Transmission by the nervous system is short-lived but quick, whereas transmission by the hormonal system is long-lasting but takes much longer. This means that communication is faster when using the nervous system. In the nervous system, responses are localised - whereas in the hormonal system, they are widespread. Responses are often permanent in the hormonal system, but temporary and reversible in the nervous system.

Answer 2

[First u can study what are nervous and hormonal:-]

Nerves

Nerve system coordinates all the body activities by means of neurons, the cells that act as the functional and structural unit of the nervous system. Unlike the endocrine system, nerve responses are very quick and do not last for a long period. There are three types of nerves; namely, sensory nerves, which carry impulses from sense organs to brain, motor nerves, which carry impulses from the brain to other parts of the body, and mixed nerves, which are a mixture of sensory and motor nerve fibers.

Hormones

Hormones are chemical regulators that are secreted by ductless glands called endocrine glandsand are released in the blood directly. They are transported to a target organ by blood. Hormones may be proteins, polypeptides, amino acids derivatives or steroids. Generally very small amount of hormone is needed for activating its function. Hormones are very specific in their action and influence only one specific organ, even though they are circulating with the blood stream throughout the body. Major endocrine glands found in the human body are hypothalamus and pituitary, pineal gland, thyroid gland, parathyroid, adrenal gland, pancreas, ovaries and testes. Some examples for hormones are Thyroxine, aldesterone, adrenaline, growth hormone, RH, ADH, progesterone, testosterone etc.

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[Difference between Nervous and hormonal!]

• Nerve impulses mainly carry the signal within nerves, whereas hormones act as a chemical signal within the endocrine system.

• Nerve signals transmit along the nerves, and are controlled by the central nervous system while hormones are transmitted through the bloodstream and are controlled by endocrine glands.

• In general, hormones have slow speed of effect while nerve signals have rapid transmission.

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Hope it helps u a lot!

Best of luck for ur exams!

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Evajiju!