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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

Which hormone binds to an intracellular receptor?

dopamine Insulin thyroid hormone ACTH

Where in the cell are peptide hormones synthesized?

Golgi apparatus Rough endoplasmic reticulum Nucleus Plasma membrane

Which of the following hormone is derived from cholesterol?

Epinephrine Thyroxine Estrogen Insulin

Which type of hormone is PTH (parathyroid hormone?

peptide catecholamine steroid Biogenic amine

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

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

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

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

Peptide hormones stimulate protein synthesis.

True False

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

Down regulate Up regulate Both None

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

Prostaglandins are synthesized from

Aminoacids Carbohydrates Fatty acids Cholesterol

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

Peptide hormones Prostacyclins Catecholamines Steroid hormones

Endocrine glands secrete their products into _____.

Blood Extracellular fluid ducts both A and B

Hormones can stimulate any cell in the body.

True False


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