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Walden PUBH6170 quiz 3

Question 1 Hormones are specific to particular tissues becauseAnswerthey will only interact with target cells at a synapse.they are released next to target tissues, so they cannot interact with other cells.target tissues display the appropriate receptor for a particular hormone.they can only be released following depolarization of the target cell.all of the above1 points Question 2 In humans, fertilization usually occurs ________ after intercourse, if an egg is present.Answer24-48 hours3-6 days6-24 hours7-10 days10-12 days1 points Question 3 Research on the aging process shows that wounds of the elderly heal more slowly and that they are more susceptible to disease. These are problems associated with an aging ________ system.Answerrespiratoryimmuneintegumentarydigestiveendocrine1 points Question 4 Nitric oxide is produced by cells lining the blood vessels; this chemical messenger regulates the contraction of smooth muscle in the digestive tract as well as local blood flow in various tissues of the body.AnswerTrueFalse1 points Question 5 The levels of potassium and sodium in the body are regulated primarily by the hormone aldosterone.AnswerTrueFalse1 points Question 6 If diabetes is left untreated, which of the following could develop as a result?Answerneural disorderskidney failureblindnesscardiovascular disordersall of the above1 points Question 7 Which of the following organs is part of the forebrain?Answerhypothalamusthyroidanterior pituitarythymusposterior pituitary1 points Question 8 In order for a hormone to cause a response, it must first bind to an appropriate receptor on its target cell.AnswerTrueFalse1 points Question 9 Which of the following organs is not fully developed in a fetus and is therefore bypassed by the ductus aerteriosus?Answerliverpancreasheartlungsbladder1 points Question 10 The process by which the blastocyst becomes buried within the endometrial lining of the uterus is:Answerfertilization.implantation.morphogenesis.differentiationembryonic development.1 points Question 11 Disorders associated with the endocrine system can be caused by problems with hormone production or lack of receptors for the hormones on the target cells.AnswerTrueFalse1 points Question 12 When the amount of thyroxine in the body increases, the basal metabolic rate of the body also increases.AnswerTrueFalse1 points Question 13 During puberty, the secretion of GnRH causes the secretion of ________, which in turn stimulate(s) the production of sex hormones.AnswerLH and FSHoxytocin and prolactininsulingrowth hormoneoxytocin and growth hormone1 points Question 14 Which of the following is true regarding an aging nervous system?AnswerNeurons continue to reproduce to replace damaged neurons, but at a slower pace.The brain increases slightly in size.Lenses of the eyes stiffen, making it more difficult to focus.Balance and motor skills are affected; the senses of smell and taste are not affected.The number of connections between neurons of the brain decrease.1 points Question 15 Which of the following nonhormonal chemical messengers is important in local control of blood flow and blood clotting?Answerprostaglandinsnerve growth factortumor angiogenesis growth factorhistamineepidermal growth factor

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