Phenelzine is a common MAO inhibitor that has been used to treat depression. It is not, however, prescribed as often as other antidepressants due to its effects on the autonomic nervous system. Describe several side effects that may result from taking phenelzine and explain why they might occur.
What will be an ideal response?
MAO inhibitors prevent the enzymatic breakdown of catecholamines such as norepinephrine. As a result, a higher concentration of norepinephrine remains in the synapse and therefore is able to elicit a longer / stronger response on its target tissues. Consequently, norepinephrine can prolong its activity through sympathetic pathways to increase heart rate and blood pressure, decrease gastric motility causing constipation as well as prevent penile ejaculation leading to sexual dysfunction. This is discussed in "The Autonomic Division" section of the chapter.
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On axial CT images, the caudate lobe of the liver is separated from the left lobe by the
A. falciform ligament. B. ligamentum venosum. C. ligamentum teres. D. round ligament.
A woman is in labor but the uterine contractions stop. This could be caused by insufficient ________ (a hormone)
A) Melatonin B) Oxytocin C) ADH D) Pituitary hormone
Which can serve as substrates for ATP production?
A) glucose and fatty acids only B) glucose only C) fatty acids only D) amino acids only E) glucose, amino acids and fatty acids
Human chorionic gonadotropin
a. is secreted by the corpus luteum of pregnancy. b. in the urine is the basis of pregnancy diagnosis tests. c. stimulates placental secretion of estrogen and progesterone. d. both (a) and (b) above. e. all of these answers.