Histoendocrine

1. 1Choose the incorrect statement.

   1. AIn the anterior pituitary, acidophilic somatotropes release growth hormone.
   2. BHypothalamic dopamine inhibits prolactin secretion by the anterior pituitary.
   3. CBasophilic cells of the anterior pituitary release hormones that act on other endocrine organs.
   4. DThe capillary system present in the anterior pituitary can be characterized as fenestrated without diaphragms.
   5. ETypically, acidophils represent a larger percentage of total cells present in the anterior pituitary than basophils.
2. 2Choose the incorrect statement.

   1. AThe pars intermedia is lined by basophilic cuboidal cells.
   2. BThe pars intermedia contains cells that produce pinealocyte stimulating hormone.
   3. CThe pars intermedia is a remnant of Rathke's pouch.
   4. DThe pars intermedia is not well developed in humans.
   5. EThe pars intermedia lies in the middle of the pituitary gland, coronally.
3. 3Choose the incorrect statement.

   1. AThe supraoptic nucleus produces a hormone that causes retention of water in the collecting ducts.
   2. BThe posterior pituitary contains "glial-like" cells called pituicytes.
   3. CThe hormones of the posterior pituitary are produced in the hypothalamus and stored in "Herring bodies."
   4. DThe paraventricular nucleus produces a hormone that results in myoepithelial contraction of specific cells.
   5. EThere are two incorrect answer choices.
4. 4Choose the incorrect statement.

   1. AThe adrenal medulla contains chromaffin cells which are derivative of neural crest cells.
   2. BPreganglionic sympathetic neurons innervate cells in the adrenal medulla.
   3. CThe zona glomerulosa makes up about 80% of the adrenal cortex by weight.
   4. DThe adrenal cortex develops from mesoderm.
   5. EThe zona fasciculata releases glucocorticoids.
5. 5Choose the best answer.

   1. AThe delta cells of the pancreas release somatostatin, which inhibits the release of growth hormone by the anterior pituitary.
   2. BF-cells, also known as PP cells, release pancreatic peptide.
   3. CThe alpha cells of the pancreatic Islets of Langerhans are centrally located.
   4. DThere are approximately one million Islets of Langerhans in the pancreas.
   5. EBoth 'b' and 'd' are correct.
6. 6Choose the correct statement.

   1. AParafollicular cells secrete calcitonin, which directly suppresses osteoclast activity.
   2. BThe thyroid releases TSH, which acts on the parathyroid.
   3. CThe entire thyroid gland is covered by a connective tissue capsule.
   4. DThe thyroid contains fenestrated capillaries with no diaphragm.
   5. EBoth 'a' and 'c' are correct.
7. 7Choose the incorrect statement.

   1. AThere are four parathyroid glands, which are located on the posterior aspect of the thyroid.
   2. BThe chief cells of the parathyroid release PTH, which increases blood [Ca2+] and decreases blood [phosphate].
   3. COxyphil cells of the parathyroid are large and acidophilic, there function is unknown.
   4. DPTH acts directly on osteoclasts to increase blood [Ca2+].
   5. EPTH promotes the activation of vitamin D in the kidneys.
8. 8Choose the incorrect statement.

   1. AThe pineal gland contains melatonin secreting pinealocytes.
   2. BThe pineal gland often contains calcium deposits in the ECM called corpora arenacea.
   3. CMelatonin plays a role in maintaining bodily rhythms.
   4. DThe pineal gland receives innervation from post ganglionic para sympathetic fibers derived from superior cervical ganglia.
   5. EAstrocytes are present in the pineal gland.

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Test sobre Histoendocrine, creado por mbkatz21 el 24/03/2014.

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mbkatz21

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