• University of South Carolina

• BIOL 460  exam 4

1. What element is necessary for the production of thyroxine?
 
2. What is the precursor molecule for three types of adrenal cortex hormones?
 
3. A 40-year old obese woman patient presents with her physical and lab tests
suggesting that she is suffering from hyperglycemia, muscle weakness, and
increased circulating levels of ACTH. The most likely cause of her condition is?
 
4. Parathyroid hormone increases renal calcium reabsorption by acting on what
two structures?
 
5. Melatonin is synthesized from what amino acid?
 
6. Which of the following hormone-gland relationship is incorrect?
a. Glucagon - Pancreas
b. Human Chorionic Gonadotropin - Ovary
c. Melatonin - Pineal Gland
d. Testosterone – Testis
7. The trigger for ovulation in the menstrual cycle is the surge of what hormone?
a. LH
8. Hypothalamus secretes ______________
a. Neurohormones
9. Thyroid hormones bind to receptors which
a.stimulate production of cyclic AMP
b.stimulate production of inositol triphosphate
c.activate tyrosine kinase
d.regulate gene transcription
10.In the phospholipase C mechanism, most of the increased intracellular calcium
comes from
a. the endoplasmic reticulum
11.What is produced when two diiodotyrosine molecules couple together?
a.tetrauiditgryonine
b.triiodothryonine
c.thyroxine
d.Both tetraiodothryonine and thyroxine are correct
 
12.What hormone stimulates uterine contractions during labor and milk-ejection
during lactation?
a. Oxytocin
13.Which of the following is NOT a role of glucagon in blood glucose homeostasis?
a.stimulates glycogenolysis and gluconeogenesis in the liver
b.promotes lipolysis
c.promotes the movements of glucose out of skeletal muscle cells
d.raises blood glucose levels
14.Which of the following is NOT an action of aldosterone secretion?
a.stimulates kidneys to retain Na+
b. causes loss of K+ in urine
c. an increase in blood volume and pressure
d.raises blood glucose levels
15.A 28 year old male patient presents with an obvious swelling in the neck. He
also complains of being incredibly tired and depressed while experiencing
unexplainable weight gain. You decide to measure his TSH levels. What would
you expect to see and what diagnosis would you give this patient?
a.High TSH levels, Endemic goiter
b.High TSH levels, Grave's Disease
16.A 40 year old female patient presents with generalized weakness and rapid
weight loss. After completing an initial blood panel, you notice that her blood
glucose levels is quite low however her insulin and glucagon levels seem to be
in normal ranges. You order additional work and notice that her ACTH levels are
very low. What diagnosis would you give this patient?
A. Hyperthyoidism
B.Addison's Disease
C. Cushing's Disease
17.The pancreas secretes hormones involved in regulation of
 
18.South Carolina used to be known for having a lot of what particular element that
is necessary for the production of thyroxine in its soil contents?
 
19.Cycles of physiological activity that follow a 24 hour pattern are called?
 
20.Melatonin is anti-gonadotropic. Knowing this fact, you would expect animals in
South Carolina to breed more during which seasons?
a. spring and summer