Which Factor Does NOT Contribute to Parturition

question 197

Multiple Choice

Which factor does NOT contribute to parturition?

• A) The increasing ACTH (adrenocorticotropic hormone) secretion by the fetal pituitary causes the fetal adrenal glands to secrete more cortisol, which diffuses into the maternal circulation.
• B) Cortisol increases oxytocin and progesterone secretion, increasing plasma progesterone levels.
• C) The uterus stretches as the pregnancy progresses, initiating nerve impulses that stimulate oxytocin secretion from the posterior pituitary lobe.
• D) The number of oxytocin receptors on uterine muscle fibres increases, causing the uterus to become more sensitive to the effects of oxytocin.

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The amount of revenue remaining after deducting variable costs, which can be used to cover fixed costs and contribute to profit.

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