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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
How does our body respond when adrenaline is secreted into the blood?
Where are hormones made in the human body?
Name the disease caused by the deficiency of thyroxine hormone in the body.
Why do you need iodine in your diet?
What substances are made by endocrine glands?
How does chemical coordination take place in human beings?
Why is the use of iodised salt advisable?
Which hormone gives girls soft skin?
Write the names of five endocrine glands found in the human body. Name the hormones secreted by each gland.
Name the gland which controls the secretion of hormones from the pituitary.
Which of the following hormone prepares our body for action in emergency situations?
(a) testosterone
(b) growth hormone
(c) adrenaline
(d) insulin
A doctor advised a person to take injection of insulin because :
(a) his blood pressure was high
(b) his heart beat was high
(c) his blood sugar was high
(d) his thyroxine level in blood was high
Dwarfism results due to:
The underactive endocrine gland which causes goitre is :
(a) pancreas
(b) thyroid
(c) adrenal
(d) pituitary
The use of iodised salt is recommended to prevent :
(a) diabetes
(b) gonorrhoea
(c) dysentery
(d) goitre
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 doctor advised a person to take an injection of insulin because:
How does chemical coordination take place in animals?
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.
Write any three responses which enable the animal body to deal with a scary situation.
