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प्रश्न
Which of the following does not act as an endocrine gland as well as an exocrine gland?
(a) testis
(b) ovary
(c) pituitary
(d) pancreas
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उत्तर
(c) Pituitary
The pituitary gland is an endocrine gland, while the ovary, testis and pancreas are heterocrine glands. Those glands which are partly exocrine (with duct) and partly endocrine (without duct) are known as heterocrine glands. Here, the exocrine part releases secretion into the duct, while the endocrine part releases hormones into blood.
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संबंधित प्रश्न
Where are hormones made in the human body?
Name the hormones secreted by testes.
Name one gland which acts only as an exocrine gland.
If sugar is detected in the urine of a person, name the disease he is suffering from.
Which one term of the following includes the other three?
adrenalin, insulin, hormone, thyroxine, estrogen
How does chemical coordination take place in human beings?
Why is the use of iodised salt advisable?
Write the names of all the major endocrine glands present in the human body. Which of these glands also function as exocrine glands?
Which hormone controls the amount of glucose in blood?
Name the gland which controls the secretion of hormones from the pituitary.
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
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.
A gland W is located just below the stomach in the human body. The gland W secretes a hormone X. The deficiency of hormone X in the body causes a disease Y in which the blood sugar level of a person rises too much. The person having high blood sugar is called Z.
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(b) What is the function of hormone X?
(c) Name (i) disease Y, and (ii) person Z.
(d) What advice would you like to give to a person who is suffering from disease Y due to faulty life-style?
A and B are two pairs of glands that are present in the human endocrine system. The pair A is found only in females, whereas B is present only in males. Glands A make and secrete two hormones C and D, whereas glands B make and secrete only one hormone E. In addition to hormones, Glands A make gametes F, whereas glands B make gametes G.
(a) What are the glands A?
(b) What are the hormones C and D?
(c) What are the glands B? Name the hormone E.
(d) What are the gametes F and G?
(e) Which event in the life of males and females is associated with the secretion of the hormones C, D and E?
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How does chemical coordination take place in animals?
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