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प्रश्न
A and B are the two systems of control and coordination in the human body. The messages in system A are transmitted in the form of chemical substances C which travel comparatively slowly through the blood stream. The substances C are made in tissues D present in the head and trunk of human body. The messages in system b are transmitted very quickly in the form of electrical impulses through fibres E. The effect of messages transmitted by system b usually lasts for a much shorter time as compared to those transmitted by system A.
(a) Name the system A. What does system A consist of?
(b) Name the chemical substance C.
(c) What is tissue D? Name any five such tissues in the human body.
(d) Name the system B. What does system B consist of?
(e) Name the fibres E.
(f) State whether system A controls the working of system B or system B controls the working of system A.
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उत्तर
- A represents the endocrine system. The endocrine system is composed of glands.
- C represents hormones. Hormones are the chemical messengers of the body and they travel slowly through the bloodstream.
- D represents endocrine glands that are made up of tissues. Hypothalamus, thyroid, thymus, pancreas and adrenal glands are some of the endocrine glands present in the human body.
- B represents the nervous system. It comprises the brain, spinal cord and nerves.
- E represents nerve fibres. They transmit messages very quickly in the form of electrical impulses.
- The nervous system (B) controls the working of the endocrine system (A).
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संबंधित प्रश्न
What is the name of in-built 'arrangement' in our body which controls the timing and amount of hormones released by various endocrine glands in the body?
Name one gland which acts only as an endocrine gland.
Which one term of the following includes the other three?
adrenalin, insulin, hormone, thyroxine, estrogen
What substances are made by endocrine glands?
What is the function of insulin hormone? What type of patients are given insulin injections?
State the functions of Thyroxine hormones.
State the functions of Adrenaline hormones.
Write the names of all the major endocrine glands present in the human body. Which of these glands also function as exocrine glands?
Name the gland which controls the secretion of hormones from the pituitary.
One of the following acts as an endocrine gland as well as an exocrine gland. This one is :
(a) salivary gland
(b) pancreas
(c) pituitary
(d) parathyroid
Which of the following is a mis-matched pair?
The dramatic changes in body features associated with puberty are mainly because of the secretions of :
(a) estrogen from testes and testosterone from ovary
(b) estrogen from adrenal gland and testosterone from pituitary gland
(c) testosterone from testes and estrogen from ovary
(d) testosterone from thyroid gland and estrogen from pituitary gland
The faulty functioning of an endocrine gland can make a person very short or very tall. This gland is :
(a) thyroid
(b) pineal
(c) adrenal
(d) pituitary
The gland A is attached to the wind pipe in the human body. The gland A makes and secretes a hormone B which controls the metabolism of carbohydrates, fats and proteins in the body. The non-metal element C is necessary for the formation of hormone B. The deficiency of C in the diet can cause a deficiency of hormone B in the body leading to a disease D in which the neck of a person appears to be swollen. People are advised to use salt E in cooking food so as to avoid disease D.
(a) Name (i) gland A, and (ii) hormone B.
(b) What is the element C?
(c) Name one type of food which can provide sufficient C in the diet of a person.
(d) Name (i) disease D, and (ii) salt E.
A piece of thread was tied tightly around an animal's pancreatic duct. The animal subsequently had difficulty in digesting food but did not get diabetes. Explain.
Which is the target organ of both adrenaline and insulin?
(a) heart
(b) kidney
(c) liver
(d) pancreas
A doctor advised a person to take an injection of insulin because:
Name the gland and the hormone secreted by it in scary situations in human beings. List any two responses shown by our body when this hormone is secreted into the blood.
Name the hormone secreted in scary situations by animals. Write any three responses which enable the animal body to deal with it.
