Exam 18: Principles of Endocrinology - the Central Endocrine Glands

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The specialized retinal ganglion cells cue the pineal gland about the presence or absence of light by sending their signals along the __________ to the suprachiasmatic nucleus.​

(Short Answer)
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A long bone consists of a fairly uniform cylindrical shaft,the epiphysis,with a flared articulating knob at either end,a diaphysis.​

(True/False)
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Melatonin is an effective antioxidant,a defense tool against biologically damaging free radicals.​

(True/False)
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What are the bone cells called that produce the organic matrix?​

(Multiple Choice)
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What kind of lipophilic hormone stays active in the blood the longest?​

(Multiple Choice)
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The anatomic and functional link between the hypothalamus and the anterior pituitary is an unusual capillary-to-capillary connection called the __________.​

(Short Answer)
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Growth hormone directly influences both IGF-I and IGF-II production.​

(True/False)
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What is the natural cycle of the suprachiasmatic nucleus,without any external cues?​

(Multiple Choice)
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Frequently,a single hormone has more than one type of target cell and therefore can induce more than one type of effect.​

(True/False)
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The posterior pituitary releases into the blood two small peptide hormones,vasopressin and __________,which are synthesized by the neuronal cell bodies in the __________.​

(Short Answer)
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The fluctuating levels of __________ bring about cyclic changes in neural output from the suprachiasmatic nucleus that,in turn,lead to cyclic changes in effector organs throughout the day.​

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What is another term for the adenohypophysis?

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Hyposecretion of growth hormone in an adult is one cause of dwarfism.

(True/False)
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Children display two periods of rapid growth: a postnatal growth spurt during their first 2 years of life and a pubertal growth spurt during adolescence.​

(True/False)
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Almost all blood supplied to the anterior pituitary must first pass through the hypothalamus.

(True/False)
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The same chemical messenger may be either a hormone or a(n)__________,depending on its source and mode of delivery to the target cell.​

(Short Answer)
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Discuss the effects of growth hormone (GH)deficiency with examples.​

(Essay)
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Discuss the greatest disrupter to our natural circadian rhythms.​

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Unlike the rhythmicity of breathing,endocrine rhythms are locked on,or entrained,to external cues such as the light-dark cycle.

(True/False)
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What do corticotropes produce and release?​

(Multiple Choice)
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