Endocrine System 1Versión en línea Select all that apply. por Nicole Acker 1 A hormone... Choose one or more answers a Signaling molecule b Is secreted directly into the blood stream c Must bind to a receptor d Have no effect on gene expression 2 Peptide hormones... Choose one or more answers a Are made of amino acids b Are considered second messengers c Require intracellular receptors d Require extracellular receptors 3 What are examples of hormone amplification? Choose one or more answers a A hormone molecule binds to multiple receptors before it is degraded. b Larger hormone molecules induce larger effects. c One receptor activates multiple enzymes triggering larger numbers of second messengers. d Increased blood pressure increases hormone production. 4 Identify the common second messengers in a target cell. Choose one or more answers a Na b Cyclic adenosine monophosphate (cAMP) c Ca d Triphosphate (IP3) 5 The effects of peptide hormones are... Choose one or more answers a Slow but short lived due to second messenger systems b Rapid but short lived due to their ability to travel freely in the blood stream c Rapid but short lived due to second messenger systems d Long term and do not require constant stimulation 6 Steroid hormones are... Choose one or more answers a Derived from cholesterol b Primarily produced by gonads and hypothalamus c Primarily produced by gonads and adrenal cortex d Are charged polar molecules 7 Steroid hormone receptors are... Choose one or more answers a Intranuclear b Extracellular c Intracellular 8 After undergoing conformational changes, steroid hormone receptors can bind directly to DNA causing an increase or decreased transcription? Choose one or more answers a True b False 9 A peptide hormone can either activate or inhibit enzyme activities. a False b True 10 Why do the effects of steroid hormones last longer than peptide hormones? Choose one or more answers a Steroid hormones cause changes in the amount of mRNA b Steroid hormones cause changes in the amount of proteins. c Steroid hormones have direct action on DNA. d Because of their non polar nature, steroid hormones last longer in the cell membrane. 11 Steroid hormones do not require transport proteins in the bloodstream. a True. Steroid hormones are water soluble so they can be transported freely in the blood. b True. Steroid hormones are not water soluble so they can be transported freely in the blood. c False. Steroid hormone and not water soluble so they require transport proteins in the bloodstream. d False, Steroid hormones are water soluble so they require transport proteins in the blood stream. 12 The levels of carrier proteins in the blood change the levels of active hormones. Choose one or more answers a True b False 13 All of the following are amino acid-derivative hormones except a Epinephrine/nor-epinephrine b Cortisol c triiodothyronine d thyroxine 14 Which of the following are not peptide hormones? Choose one or more answers a Estrogen b Testosterone c Cortisol d ADH 15 GnRH stimulates the release of LH and FSH which then acts on the gonads. This is a type of ... a Steroid hormone b Direct hormone c amino acid-derivative hormone d Tropic hormone
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