Explain why bleeding tends to cause a reduction in blood pressure.
What will be an ideal response?
Answer: The loss in blood volume will reduce the volume of blood in the veins and venous return to the heart, reducing end-diastolic volume, stroke volume, cardiac output, and arterial blood pressure
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Which of the following describes a body process that is controlled using a positive feedback loop?
a) increasing body temperature in response to a drop in body temperature b) decreasing body temperature in response to elevated body temperature c) decreasing blood [glucose] in response to elevated blood [glucose] d) increasing strength of uterine contractions in response to cervical stretch e) decreasing heart rate in response to elevated blood pressure
Thyroxine is a peptide hormone, but its mechanism is different from other peptide hormones. Which of the following statements is true concerning this difference?
A) It is very specific in the cell type it targets. B) It is a stimulant of cellular metabolism and targets all cells. C) It causes positive feedback. D) It does not require a second messenger to cause a response.
In an adult, the proximal portions of the umbilical arteries persist and supply
blood to the _____ _____. Fill in the blank(s) with correct word
All of the following terms mean ear except which one?
A. None of the answer choices are correct. B. tympan/o C. aur/o D. ot/o