When there is a drop in blood pressure, the body reacts immediately by way of theSelect one: a. baroreceptor mechanismOb. adrenal medullary mechanism c. stress-relaxation mechanism d. CNS ischemic mechanism e. chemoreceptor mechanism
Added by Christina O.
Step 1
** Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 81 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Which of the following will occur as a result of baroreceptors? 1. Increased action potential discharge of aortic baroreceptors 2. Decreased activity of parasympathetic ganglion neurons controlling the heart 3. Increased vagus nerve activity 4. Increased force of cardiac muscle contraction 45. Which of the following is/are normal acute cardiovascular responses to exercise? 1. Fall in venous return to the heart 2. Marked increase in total peripheral resistance (TPR) 3. Increase in mean arterial blood pressure 4. Dilation of blood vessels to the skin 5. Maintenance of normal body temperature 46. Which is the most important long-term factor (weeks to months) that determines blood pressure? 1. Number of heart B-adrenoceptors 2. Number of nerve fibers innervating the aortic and carotid arch baroreceptors 3. High-pressure baroreceptors 4. Blood volume 5. Skeletal muscle activity and posture 6. Pulmonary blood flow Which of the following mechanisms will cause an immediate increase in cardiac output? 1. Activation of the sympathetic nervous system 2. Dilation of veins 3. Activation of high-pressure baroreceptors 4. Stimulation of the vagus nerve A man has been wounded in a knife fight and has lost a significant amount of blood (about 15% of his normal volume). The body tries to compensate by increasing cardiac output to supply oxygen to the tissues. Which of the following mechanisms is plausible for this? 1. Constriction of veins and venules in the systemic circulation 2. Inhibition of parasympathetic preganglionic cells in the vagus nerve 3. Increase in heart rate 4. Increase in force of ventricular contraction
Adi S.
All of the following statements regarding central control of autonomic functions are correct except: Baroreceptors are pressure sensors located at various cardiovascular sites. The parasympathetic system is activated by the CNS in response to a sudden drop in blood pressure. The sympathetic system is activated by the CNS in response to a sudden drop in blood pressure. The parasympathetic system is activated by the CNS in response to a sudden increase in blood pressure.
You just found out that the anatomy practical is today. This has caused your blood pressure to suddenly increase. How would your body respond to this sudden change? A. Blood pressure would decrease as the walls of her blood vessels relaxed, decreasing vasomotor tone. B. Peripheral resistance would increase in her blood vessels as blood vessels dilate. C. Vasoconstriction of her blood vessels would decrease overall blood pressure. D. Sympathetic stimulation of the heart would decrease her heart rate and therefore her blood pressure. E. All of the choices are correct.
Sri K.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD