Bio 210 test 2 Questions with Correct Answers

Bio 210 test 2 Questions with Correct Answers Receptors for lipophobic messengers are typically located where in the cell? - AnswerPlasma membrane Which of the following are proteins on a target cell that specifically recognize and bind only one messenger or a class of messengers? - Answer-Receptors Chemical messengers derived from cholesterol fall under which category? - AnswerSteroid messengers Which of the following chemical messengers is characteristically released from an endocrine gland? - Answer-Hormone Hormones can be transported in blood in dissolved form or bound to - Answer-Carrier proteins What type of hormones bind to receptors located on the cell membrane? - AnswerWater soluble hormones, such as insulin and epinephrine Which intracellular substance degrades cAMP, thus inactivating the response to a hormone? - Answer-Phosphodiesterase Growth factor hormones, such as insulin, bind to which type of receptors? - AnswerTyrosine Kinase Receptors Which is the correct order of events for hormones activating Gs Proteins? - AnswerActivation of G protein, binding of GTP, activation of adenylate cyclose, conversion of ATP to cAMP Which second messenger causes the release of calcium from the endoplasmic reticulum> - Answer-IP3 Which of the following adrenergic receptors increase cAMP levels? - Answer-B(beta) receptors Where in the cell are receptors for cholesterol derived chemical messengers typically located? - Answer-Nucleus/Cytosol The strength of binding between a messenger and its receptors is known as - Answeraffinity One of the striking features of second messengers is the ability to elicit a marked response on a target cell by small changes in the concentration of a chemical messenger. This phenomenon is known as - Answer-single amplification A chemical messenger that is released into the blood stream to travel to its target would be categorized as a(n) - Answer-hormone