Steroid hormones exert their action by _______.Question 18Select one:a.entering the nucleus of a cell and initiating or altering the expression of a geneb.finding an appropriate cell receptor and initiating cAMP activityc.stimulating the synthesis of a glycogend.increasing blood flowe.increasing blood pressure

13. Steroid hormones such as estrogen act on target cells bya. initiating ion channel activity.b. binding to membrane proteins.c. initiating DNA transcription.d. activating enzymes.e. binding to membrane lipids.

Which one of the following endocrine system statements is INCORRECT?Question 19Select one:a.All cells produce Steroid hormones using cholesterol as a precursor molecule. b.Signal amplification is achieved through the use of second messenger signalling pathways and means that cells do not need to express a large amount of receptors for a hormone to cause a large effect in the cell. c.Chaperone molecules do not enter the nucleus of the cell. d.Agonists activate receptor signalling pathways within a cell. e.Up-regulation of receptors allows cells to enhance their sensitivity to a ligand.

Fill in the Blank QuestionFill in the blank question.In order for a hormone to act on a target cell, it must bind to a specific .

When a steroid hormone binds to its target cell receptor, it:Group of answer choicesalters the membrane’s permeability to G proteins.is converted into cholesterol, which acts as a second messenger.causes the formation of releasing hormones.turns specific genes of the nuclear DNA on or off.causes the formation of cyclic AMP

Steroid hormones result in:Group of answer choicesdirect gene activationhormone binding to a membrane-bound receptoractivation of a G proteinactivation of adenylate cyclaseproduction of 2nd messengersall of theseNext