
Introduction:
The hormones are the signaling molecules which are produced by cells present in the glands. The hormones are transported to distant targets organs by the circulatory system. The synthesis of hormones is a characteristic feature of multicellular organisms.

Answer to Problem 1FIB
Correct answer:
Endocrine hormones are molecules released by cells that are parts of the endocrine system. These cells are embedded in capillary beds, so the hormones enter the bloodstream and move throughout the body. Only specific cells of the body called target cells can respond to any given hormone because only these cells bear proteins, called receptors that can bind the hormone.
Explanation of Solution
The endocrine hormones are the chemical messengers which are synthesized and stored in the cells which are part of the endocrine system. The secretory cells or the cells which synthesize hormones remain embedded within the capillary network. The hormones from there enter the bloodstream.
There are only specific cells which have the receptors to which the hormones are able to bind. All the cells do not have all kinds of receptors. These specific types of cells are known as target cells.
The endocrine hormones are produced by the cells of the endocrine system which are embedded in the capillary network which allows the transportation of hormones to distant organs. The hormones bind to receptors which are present on specific cells known as target cells.
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