Exam 18: Principles of Endocrinology - the Central Endocrine Glands
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Exam 18: Principles of Endocrinology - the Central Endocrine Glands100 Questions
Exam 19: The Peripheral Endocrine Glands100 Questions
Exam 20: The Reproductive Systembrad100 Questions
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Primary hyposecretion takes place when an endocrine gland is normal but is secreting too little hormone because of a deficiency of its tropic hormone.
(True/False)
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The axons of the neurosecretory neurons that produce the hypothalamic regulatory hormones terminate on the __________ at the origin of the portal system.
(Short Answer)
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Sex steroids are potent growth stimulators and contribute to the pubertal growth spurt,but they ultimately stop further growth by closing the epiphyseal plates.
(True/False)
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Growth hormone promotes growth of soft tissues by __________ and hyperplasia.
(Short Answer)
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What is the most abundant hormone produced by the anterior pituitary?
(Multiple Choice)
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A tropic hormone's actions aimed at maintaining the structural integrity of its target gland are specifically known as __________ actions.
(Short Answer)
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Growth hormone uses up fat stores and promotes synthesis of body proteins,so it encourages a change in body composition away from adipose deposition toward an increase in muscle.
(True/False)
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In a growing bone,the diaphysis is separated at each end from the epiphysis by a layer of cartilage known as the __________.
(Short Answer)
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The two biggest self-prescribed uses of melatonin are as prevention for the common cold and as a reproductive aid.
(True/False)
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The master biological clock that serves as the pacemaker for the body's circadian rhythms is the suprachiasmatic nucleus (SCN).
(True/False)
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Lactotropes secrete prolactin (PRL),which enhances breast development and lactation in females.
(True/False)
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Figure 18-3
Use the figure above (Figure 18-3)to answer the corresponding questions.
-Which number in the figure represents the optic chiasm?
(Multiple Choice)
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Unlike other regions of the brain,portions of the hypothalamus are not guarded by the blood-brain barrier,so the hypothalamus can easily monitor chemical changes in the blood.
(True/False)
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Some endocrine control systems include both feedback control (which maintains a constant basal level of the hormone)and neuroendocrine reflexes (which cause sudden bursts in secretion in response to a sudden increased need for the hormone).
(True/False)
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What is the main nutrient needed in order to synthesize thyroid hormone?
(Multiple Choice)
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