All Human Anatomy and Physiology Resources
Example Questions
Example Question #16 : Endocrine And Reproductive Physiology
Steroid hormones are synthesized from which molecule?
Tyrosine
Cholesterol
Cortisol
Cyclooxygenase
Deoxyribose
Cholesterol
Steroid hormones are synthesized from cholesterol. The amine hormones are synthesized from the amino acid tyrosine. Cortisol is an example of a steroid hormone, and is not a precursor for the synthesis of other steroid hormones.
Example Question #17 : Endocrine And Reproductive Physiology
Match the following adrenal layer to the correct secretory product.
Zona glomerulosa; aldosterone
Medulla; aldosterone
Zona fasciculata; aldosterone
Zona reticularis; catecholamines
Medulla; androgens
Zona glomerulosa; aldosterone
The following are appropriate matches of adrenal layers to their corresponding secretory products: zona glomerulosa; aldosterone, zona fasciculata; cortisol and minor amount of androgens, zona reticularis; androgens, medulla; catecholamines. The layers of the adrenal glands, from superficial to deep are: capsule, zona glomerulosa, zona fasciculata, zona reticularis, medulla.
Example Question #18 : Endocrine And Reproductive Physiology
Which of the following is not a response due to increased levels of parathyroid hormone?
Increased osteoclast activity
Increased production of 25-hydroxyvitamin D3
Increased absorption of calcium in the renal tubule
Decreased levels of calcium in the blood
Increased calcium absorption in the intestines
Decreased levels of calcium in the blood
Parathyroid hormone (PTH) is released when blood calcium levels are low, and functions to raise blood calcium levels via a negative feedback mechanism. It does this by increasing osteoclast activity and degrading bone to release calcium into the blood. It also increases absorption of calcium in the renal tubule, increases production of 25-hydroxyvitamin D3, and increases absorption of calcium in the intestines.
Certified Tutor
All Human Anatomy and Physiology Resources
