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Test: Mechanism of hormone action

Category: Biology

Description: This test targets the students preparing for the medical entrances. The questions are related to the topics: Classification of hormones and mechanism of hormone action.

Keywords: steroid, peptide, second mesenger, hormone receptor complex, hormone

Relevant Website: purnasrinivas.weebly.com

Hormones can stimulate any cell in the body.

True False

Prostaglandins are synthesized from

Aminoacids Carbohydrates Fatty acids Cholesterol

Endocrine glands secrete their products into _____.

Blood Extracellular fluid ducts both A and B

The secretion of a nonpolar hormone is regulated by __________.

A steroid Tropic hormone which is usually a peptide Prostacyclins None of the above

Which type of hormone is 1,25(OH)2D (the active form of vitamin D)?

peptide catecholamine Biogenic amine steroid

The steps of the cAMP second messenger system in the correct chronological sequence are: 1.G-protein binds to adenylate cyclase which converts ATP into cAMP. 2. Activated protein kinases elicit the cell response. 3. Hormone binds with Receptor. 4. cAMP phosphorylates protein kinases. 5. Receptor changes shape and activates G-protein.

1,5,4,3,2 3,5,1,4,2 2,5,4,1,3 4,3,5,2,1

Which type of hormone is PTH (parathyroid hormone?

peptide catecholamine steroid Biogenic amine

Where in the cell are peptide hormones synthesized?

Golgi apparatus Rough endoplasmic reticulum Nucleus Plasma membrane

Dopamine, epinephrine, and norepinephrine are collectively referred to as the ______________.

Peptide hormones Prostacyclins Catecholamines Steroid hormones

Name the prohormone from which ACTH and alpha-MSH are produced.

pro-opiomelanocortin (POMC) Halodrol Superdrol None of the above

Which of the following hormone is derived from cholesterol?

Epinephrine Thyroxine Estrogen Insulin

Peptide hormones stimulate protein synthesis.

True False

Which hormone binds to an intracellular receptor?

dopamine Insulin thyroid hormone ACTH

Receptors for water-soluble hormones are found on the _____________ of target cells, while receptors for lipid-soluble hormones are found in the ________ or________ of cells.

Plasma membrane, cytoplasm, nucleus Nucleus, extracellular fluid, plasma membrane Nucleus, cytoplasm, plasma membrane None of the above are correct

Target cells tend to ______ _______ the number of their receptors when there are sustained high levels of hormone present.

Down regulate Up regulate Both None


Question On Mechanism Of Hormon Action Questions About Mechanism Of Hormone Action Target Cells Tend To Hormone Action Exam Target Cells Tend To ______ The Number Of Their Receptors When There Are Sustained High Levels Of Hormone Present. Mechanism Of Hormone Action Questions Exam Questions In Mecanism Of Action Of Hormones Target Cells Tent To What The Number Of Their Receptors When There Are Sustained High Levels Of Hormones Present? Mechanism Of Hormone Action Exam


On Mechanism Of Hormon


Questions About Hormone Target


Tend To Exam ______


Number Their Receptors When


Are Sustained High Levels


In Mecanism Hormones Tent