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Question
Which one term of the following includes the other three?
thyroid, ductless gland, thymus, pituitary, ovary
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Solution
Thyroid, pituitary, thymus and ovary are types of ductless glands.
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There are two similar glands P which are located on top of two similar organs Q in the human body. P are often called the emergency glands and they secrete a hormone R into the blood stream. R is secreted in large amounts when a person is frightened. It brings about temporary changes in the body which allow a lot of substance S from the liver to go into the blood to provide a lot of energy in a very short time. This helps a person to fight back or run away from the frightening situation.
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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.
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Assertion: On attaining puberty, breast size increases and reproductive organs develop in females.
Reason: Ovaries release the hormone progesterone in females.
