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

peptide catecholamine Biogenic amine steroid

Peptide hormones stimulate protein synthesis.

True False

Prostaglandins are synthesized from

Aminoacids Carbohydrates Fatty acids Cholesterol

Which of the following hormone is derived from cholesterol?

Epinephrine Thyroxine Estrogen Insulin

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 secretion of a nonpolar hormone is regulated by __________.

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

Where in the cell are peptide hormones synthesized?

Golgi apparatus Rough endoplasmic reticulum Nucleus Plasma membrane

Hormones can stimulate any cell in the body.

True False

Endocrine glands secrete their products into _____.

Blood Extracellular fluid ducts both A and B

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

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

Which type of hormone is PTH (parathyroid hormone?

peptide catecholamine steroid Biogenic amine

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

Peptide hormones Prostacyclins Catecholamines Steroid hormones

Which hormone binds to an intracellular receptor?

dopamine Insulin thyroid hormone ACTH

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

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

Comments

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

Question

On Mechanism Of Hormon

Action

Questions About Hormone Target

Cells

Tend To Exam ______

The

Number Their Receptors When

There

Are Sustained High Levels

Present.

In Mecanism Hormones Tent

What

Present?