Concept explainers
More than one choice may apply.
The major endocrine organs of the body
a. tend to be very large organs.
b. are closely connected with each other.
c. all contribute to the same function (digestion).
d. tend to lie near the midline of the body.
Introduction:
The endocrine system is the second control system of the body after nervous system. It releases hormones, which, in turn, regulate complex body processes like growth, metabolism, and reproduction. These hormones are released by major endocrine organs namely, the pituitary, pineal, thyroid, parathyroid, thymus and adrenal glands, pancreas, and gonads.
Answer to Problem 1MC
Correct answer:
Although a few endocrine organs and tissues are situated in the separate regions of the body, all the major endocrine organs are present in the close vicinity of the midline of the human body.
Explanation of Solution
Explanation for the correct answer:
Option (d) is given that all the major endocrine organs lie close to the midline of the body. The major endocrine organs of the body include pituitary, pineal, hypothalamus, thyroid, parathyroid, thymus and adrenal glands, pancreas, and gonads (ovaries and testes) that generally lie in the midline in the anatomical plane of the human body. Hence, option (d) is correct.
Explanation for incorrect answers:
Option (a) is given that endocrine organs tend to be very large. The organs of the endocrine system are of all sizes, some being very small (like pineal and pituitary glands) and others being large (thyroid gland). So, it is an incorrect option.
Option (b) is given that all the endocrine organs are connected to each other. The endocrine organs are situated in different places in the body. So, it is an incorrect option.
Option (c) is given that all organs of the endocrine system control the same function. The endocrine glands exhibit distinct functions. The thyroid gland is involved in the growth and development of body tissues, whereas gonads are for reproductive functions. So, it is an incorrect option.
Hence, options (a), (b), and (c) are incorrect.
The endocrine system consists of organs that are specialized to regulate various body processes. They secrete chemical messengers called hormones, which act on the target cell and control their functions.
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