What controls most hormone concentrations?Multiple ChoiceNegative feedbackPositive feedbackExposure to sunMuscle contraction

Which of the following hormones is controlled by positive feedback?Multiple Choiceprolactinoxytocingrowth hormoneantidiuretic hormonegonadotropic hormone

Which of the following ovarian hormones is involved in a positive feedback loop with the hypothalamus and the anterior pituitary?Multiple ChoiceGonadotropinProgesteroneEstrogenLuteinizing hormoneGonadotropin-releasing hormone

Fill in the Blank QuestionFill in the blank question.The blood levels of MOST hormones are regulated by feedback systems.

Choose the example that demonstrates a positive feedback loop of hormonal control.Multiple ChoicePressure receptors sense the movement of a baby against and through the cervix during labor. They stimulate the hypothalamus to release a hormone that causes uterine contractions. This causes more pressure receptor stimulation, leading to larger releases of the hormone and stronger, more frequent contractions. Hormone release ceases after pressure sensations cease.A gland releases a hormone that causes free blood glucose to be collected and stored after a meal. After a time, the gland detects low free blood glucose and ceases production of the hormone.A hormone is released from the hypothalamus, stimulating the anterior pituitary gland to release another hormone that is involved in metabolism. The flow of that hormone back to the hypothalamus inhibits the production of the first hormone in the pathway, also ceasing the production of the metabolism-influencing hormone.A hormone that increases blood pressure is released. Baroreceptors in the arteries sense the pressure change and stimulate the brainstem to send signals to dilate blood vessels and counter the effect, decreasing blood pressure.

Which of the following is the best description of the homeostatic mechanism of negative feedback?Adjustment made by the body to return itself to normal after detecting a changeAdjustment made by the body to decrease the rate of metabolismAdjustment made by the body to increase the rate of metabolismThe negative thoughts that occur when the body is in fight or flight mode2What is the role of the pituitary gland in regulating metabolic rate? It detects the levels of glucose in the bloodIt releases thyroxineIt releases thyroid stimulating hormoneIt controls the amount of oxygen entering the body3What happens when the amount of thyroid stimulating hormone released from the pituitary gland increases? More thyroxine is released from the thyroid, metabolic rate increasesLess thyroxine is released from the thyroid, metabolic rate decreasesMore thyroxine is released from the thyroid, metabolic rate decreasesLess thyroxine is released from the thyroid, metabolic rate increases4Which gland is located at the top of your kidneys?Adrenal glandsPituitary glandSweat glandThyroid gland5Which of the following is not a ‘flight or fight’ response caused by the release of adrenalin? Increased heart rate and breathingBreakdown of glycogen reserves to produce glucoseBlood redirected from skeletal muscles to digestive systemDilation of pupils6Which of the following hormones is not controlled by a negative feedback mechanism?AdrenalinADHInsulinThyroxine