Exam 40: Disorders of the Pituitary

A 28-year-old man and his wife visit a fertility clinic.His sperm count is low,but his wife's tests (LH/FSH,estrogen,etc.)all fall within the healthy reference intervals.His history indicates that he had a motor vehicle accident one year previously and was suffering from visual problems.What might be the cause of his oligospermia?

Which one of the following statements regarding FSH/LH is incorrect?

A 45-year-old female complains of fatigue,heat intolerance,and hair loss.Serum thyroxine is abnormally low.What test would confirm that this might be a pituitary disorder?

The anterior portion of the pituitary gland synthesizes many protein hormones.Another name for this part of the pituitary gland is the:

The insulin tolerance test is used to assess which one of the following hormones?

The follicle-stimulating hormone (FSH)and luteinizing hormone (LH)are important in the reproductive function of the male and female and are released in response to:

Oxytocin is:

Which one of the following hormones is classified as a glycoprotein?

An individual using antidepressants visited her physician with a complaint of water retention.Laboratory results indicated decreased urine volume,low serum sodium,low plasma osmolality,decreased serum uric acid,and urea.Antidiuretic hormone was measured and found to be elevated.What is the likely diagnosis?

Use of the cosyntropin stimulation test:

A 35-year-old man visits his physician with complaints of sudden onset of fatigue,polydipsia,and polyuria.Laboratory results indicate a normal fasting blood sugar.Serum sodium was slightly elevated.The most likely cause of these symptoms and laboratory results would be:

The release of thyrotropin-releasing hormone from the hypothalamus stimulates thyrotropin release from the pituitary,which further leads to synthesis and secretion of thyroid hormone from the thyroid gland.When the concentration of thyroid hormone in the blood turns off the release of thyrotropin from the pituitary,this is referred to as what type of feedback?

Which one of the following statements concerning hormonal regulation via the feedback loop is correct?

The hypothalamic hormone that inhibits prolactin is referred to as prolactin-inhibiting hormone but is actually:

Which one of the following hormones is responsible for normal development of cartilage and bone,mobilizing fat stores,and stimulation of protein synthesis?

The most common assay used to assess serum concentration of adenohypophyseal hormones is:

The most common hypothalamic-pituitary disorder in clinical endocrinology is:

Inhibition of growth hormone (GH)occurs through the action of:

Which one of the following is not a function of thyrotropin?

An example of a hypothalamic hormone would be: