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BIO 669 QUIZ 3 EXAM (NEW 2026 /
2027 UPDATE) QUESTIONS & VERIFIED
ANSWERS| 100% CORRECT
An important anabolic hormone which has many of its effects mediated by IGF's is:
A. Growth hormone B. Aldosterone C. Cortisol D. Luteinizing hormone correct answer A. Growth hormone
The alpha cells of the islets of Langerhans secretes:
A. Pancreatic polypeptide B. Somatostatin and gastrin C. Insulin D. Glucagon correct answer D. Glucagon
Hypocalcemia will result in all of the following except:
A. Spasms, tetany, hyperreflexia B. Hyperphosphatemia C. Positive Chvostek and trousseau sign D. Decreased neuromuscular excitability correct answer D. Decreased neuromuscular excitability
Which of the following is NOT associated with hypothyroidism?
A. Constipation B. Heat intolerance C. Hashimoto's thyroiditis
D. Myxedema coma correct answer B. Heat intolerance
Syndrome of Inappropriate Antidiuretic Hormone (SIADH) will result in all of the following EXCEPT:
A. Enhanced water retention B. Increased plasma osmolality (hyperosmolarity) C. Hyper-secretion of ADH D. No peripheral edema but muscle twitching may occur if increasing sensitivity correct answer B. Increased plasma osmolality (hyperosmolarity)
A hypodermic injection of epinephrine would:
A. Increase HR, increase BP, dilate the bronchi and increase peristalsis B. Increase HR, increase BP, dilate the bronchi and decrease peristalsis C. Decrease HR, increase BP, constrict bronchi, and increase peristalsis D. Decrease HR, decrease BP, constrict bronchi, and increase peristalsis correct answer B. Increase HR, increase BP, dilate the bronchi and decrease peristalsis
A secondary effect of this hormone is to inhibit release of gonadotropin releasing hormone, which decreases libido and fertility, and may by why there is some measure of birth control while exclusively breastfeeding a baby:
A. Cortisol B. T 3 and T 4 C. Oxytocin D. Prolactin correct answer D. Prolactin
Diabetes insipidus will show all of the following signs and symptoms EXCEPT:
A. Glucose in urine B. Frequent urination C. Stimulation of thirst reflex D. All of the above are found in DI correct answer A. Glucose in urine
All of the following effects of primary hyperaldosteronism EXPECT:
Which of the following statements are INCORRECT?
A. Metabolic syndrome is often described as a condition of HTN, dyslipidema, and above normal gas levels B. Type 1 diabetes is more commonly associated with DKA C. Type 2 diabetes is more commonly associated with hyperosmolar nonketotic syndrome D. Type 1 diabetes develops rapidly and is not associated with obesity correct answer D. Type 1 diabetes develops rapidly and is not associated with obesity
Thyroid carcinoma is the most common endocrine cancer, and is most commonly caused by
A. Parasitic infection B. Ionizing radiation, usually as a child or teen C. Insufficient oxygen around the time of birth D. Genetics correct answer B. Ionizing radiation, usually as a child or a teen
Absence of thyroxine would result in
A. Increased HR and increased force of contraction B. High metabolic rate C. Exopthalmous D. Depression of the CNS and lethargy correct answer D. depression of the CNS and lethargy
Calcitonin is produced by the
A. Adrenal B. Parathyroid C. Pituitary D. Thyroid correct answer D. thyroid gland
The pineal gland is responsible for secretion of:
A. Insulin B. Melatonin
C. ACTH
D. Prolactin correct answer B. Melatonin
Which of the following is an example of permissiveness?
A. Glucagon increases blood glucose levels and insulin decrease blood glucose levels B. Estrogen stimulates the synthesis of progesterone receptors in the endometrium C. Glucagon epinephrine and cortisol all increase glucose levels D. All of the above E. None of the above correct answer B. Estrogen stimulates the synthesis of progesterone receptors in the endometrium
DKA occurs most directly as a result of ________ leading you increased lipolysis and formation of keystone bodies
A. Increased stress hormones B. Profound insulin deficiency C. Insulin resistance with a mild decrease in insulin D. Hyperglycemia correct answer B. Profound insulin deficiency
Diabetes insipidus is best described as:
A. An inability to be able to dilute urine B. Water retention and weight gain C. An insufficiency of ADH amount or response D. Hyponatremia and decreased plasma osmolality correct answer C. An insufficiency of ADH amount or response
While the primary stimulation of aldosterone secretion is angiotensin 2 , ____ can also stimulate secretion.
A. A drop in Na or rise in K B. Growth hormone C. Increased plasma levels D. Thyroid hormone correct answer A. A drop in Na or rise in K
C. Androgens D. Aldosterone correct answer B. Epinephrine
A hormone not involved in glucose metabolism is
a. glucagon b. cortisone c. aldosterone d. insulin correct answer c. aldosterone
A possible symptom of an expanding pituitary tumor not related to hormones includes:
A. Visual disturbances B. Muscle weakness C. Respiratory depression D. Hearing disturbance correct answer A. Visual disturbances
The regulation shown by a hormone feeding face on the organ that released it, in addition to the physiological effect feeding back on the same producing/secreting organ that released the hormone is termed:
A. Long feedback loop B. Positive feedback C. Ultra-short feedback loop D. Short feedback loop correct answer C. Ultra-short feedback loop
Which of the following characteristics is typical of rapid and long lasting response hormones?
A. Bunds to surface receptors B. Carrier bound and lipid soluble C. Dissolved in plasma, water soluble D. High molecular weight correct answer B. Carrier bound and lipid soluble
Chromaffin cells are found in the:
A. Anterior gland B. Adrenal gland C. Parathyroid glad D. Pineal gland correct answer B. Adrenal gland
Besides having anti-inflammatory effects, cortisol (and this most glucocorticoids) will also:
A. Lower glucose levels in blood B. Stimulate growth C. Promote Na loss by the kidneys D. Reduce protein synthesis correct answer D. Reduce protein synthesis
Hyperthyroidism resulting from Graves' disease will present with all of the following EXCEPT:
A. Exophthalmos B. Increased levels of TSH (thyroid stimulating hormone) C. Pretibial myxedema D. Increased heart rate and metabolism correct answer B. Increased levels is TSH (thyroid stimulating hormone)
Which of the following is not a chronic complication of diabetes mellitus?
A. Retinopathy B. Increased risk of infection C. Parenthesis and neuropathy D. All of the above are chronic complications of diabetes mellitus correct answer D. All of the above are chronic complications of diabetes mellitus
panhypopituitarism will result in a decrease in all of the following except.
A. Oxytocin B. Folic stimulating hormone C. Thyroid stimulating hormone D. Growth hormone correct answer A. Oxytocin
D. Short loop inhibition correct answer A. Long loop inhibition
Which of the following is an accurate regarding the regulation of pituitary hormone secretion by the hypothalamus?
A. All anterior hormones are regulated by a releasing hormone and a release inhibiting hormone from the hypothalamus B. All posterior pituitary hormones are regulated by a releasing hormone from the hypothalamus C. All pituitary hormones are tropic hormones D. All pituitary hormones are regulated by tropic hormones from the hypothalamus. E. None of the above are correct. correct answer E. None of the above are correct.
What percentage of total beta cell population in the pancreas must be destroyed before noticeable hyperglycemia occurs?
A. About 10 % B. About half C. Between 80 - 90% D. Between 10 - 30 % correct answer C. Between 80-90%
Gestation diabetes mellitus is best described as:
A. Diabetes caused by a viral infection B. Subclinical damage to the beta calls that preceded onset of diabetes C. Any degree of glucose intolerance with onset or first recognition during pregnancy D. Beta cell function or action affected by autosomal dominant mutations correct answer C. Any degree of glucose intolerance with onset or first recognition during pregnancy
Excessive levels of cortisol as a result of excessive anterior pituitary secretion of ACTH is termed: A. Cushing syndrome B. Addison disease
C. Cushing disease D. Graves' disease correct answer C. Cushing disease
Insulin has effects on electrolytes as well as stimulating the movement of:
A. K+, PO 4 , Mg++, and amino acids into the cell B. Na out of the cell C. Ca into the cell D. Cl- out of the cell correct answer A. K+, PO4, Mg++, and amino acids into the cell
Which of the following stimulates the release of oxytocin?
A. Dehydration B. Rising blood calcium levels C. Rise in estrogen levels D. Stimulation of the nipples correct answer D. Stimulation of the nipples
