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Vasodilation of blood vessels to the kidneys is due to
________.
a. more frequent action potentials
b. less frequent action potentials
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- Which of these is a vasoconstrictor? a. nitric oxide b. natriuretic hormone c. bradykinin d. angiotensin IISympathetic impulses to the smooth muscles in the walls of arteries and arterioles produceA. Vasodilation only C. Vasomotor inhibitionB. Vasodilation and vasoconstriction D. Arteriosclerosis Substances exchanged at the capillary level move through the capillary walls byA. Diffusion B. Filtration C. Osmosis D. Active transport In the measurement of blood pressure, the cuff of the sphygmomanometer usually surroundsA. The radial artery C. The brachiocephalic arteryB. The dorsalis pedis artery D. The brachial artery Arterial blood pressure is independent ofA. Blood Volume B. Heart rate C. Blood Viscosity D. Influx of calcium ions Identify the TRUE statement (s). There may be several correct answers,A. An increased cardiac output is reflected in an elevated diastolic pressure.B. An increased cardiac output is reflected in a decreased diastolic pressure.C. An increase in the force of contraction produces an elevated…Plasma solutes enter the tissue fluid most neasily froma. continuous capillaries.b. fenestrated capillaries.c. arteriovenous anastomoses.d. collateral vessels.e. venous anastomoses.
- Compared with the interstitial fluid that bathes active muscle cells, blood reaching these cells in arteries has a(A) lower osmotic pressure.(B) higher PO2.(C) lower pH.(D) higher PCO2.(E) greater bicarbonate concentration.Slight vasodilation in an arteriole prompts a ________.a. slight increase in resistanceb. huge increase in resistancec. slight decrease in resistanced. huge decrease in resistanceIf blood pressure suddenly drops (not more than 10 mmHg) which of these mechanisms will be activated to restore blood pressure a) CNS ischemia reflex b) baroreceptor reflexes c) chemoreflexes
- Nervi vasorum control ________.a. vasoconstrictionb. vasodilationc. capillary permeabilityd. both vasoconstriction and vasodilationThe return venous blood is aided by all of the factors except? ________. A. pressure changes in the thorax B. urinary output C. venous valves D. activity of skeletal musclesWhich of these organs is able to tolerate the greatest reduction in blood flow? a. Brain b. Heart c.Skeletal muscles d.Skin
- Short-term blood pressure regulation is most associated with what effector organs? a. the heart and veins b. the heart and arteries c. the heart and arterioles d. the heart and kidneys e. the heart and systemic capillariesThe ANS regulation of blood pressure is involuntary, yet biofeedback techniques enable individuals to reduce their pulse rate and blood pressure. Explain how this occurs.A 29-year-old female develops sepsis and, as a consequence, she experiences profound vasodilation. What effect does vasodilation have on blood pressure? Explain why. How will her body try to bring her blood pressure back to homeostasis? Thank you!