Which of the following statements are true?

Endocrine glands are ductless and they secrete hormones.

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Hormones have long lasting effects on the target cells.

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Endocrine glands are always present near their target cells.

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Hormones bind to specific receptors present on the cells.

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Solution

The correct options are
A Endocrine glands are ductless and they secrete hormones.
B Hormones have long lasting effects on the target cells.
D Hormones bind to specific receptors present on the cells.
Endocrine glands are ductless. They secrete their secretions directly into the blood. Hormones are secreted by endocrine glands.
Hormones bind to specific receptors present on target cells. The effect of hormone on cells last as long as they are bound to the cells. So, it is long lasting.
Since, they are secreted into the blood, it is not necessary that the endocrine glands have to be placed near their target cells.

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