Compared with the interstitial fluid that bathes active musclecells, blood reaching these cells in arterioles has a(A) higher PO2.(B) higher PCO2.(C) greater bicarbonate concentration.(D) lower pH.
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Compared with the interstitial fluid that bathes active muscle
cells, blood reaching these cells in arterioles has a
(A) higher PO2
.
(B) higher PCO2
.
(C) greater bicarbonate concentration.
(D) lower pH.
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- Answer both questions, they follow each other 1a)Which of the following is a function of the smooth muscle layer of arterioles during the transition to exercise because of the binding of the hormone epinephrine to a beta-adrenergic receptor? Group of answer choices a)Increase MAP as a response in a negative feedback arc b)Increase the distribution of blood to skeletal muscles during exercise c)Increase TPR d)Increased cardiac output e)Decreased heart rate 1b) Which of the following is a mechanism largely responsible for distributing more blood to Jose's skeletal muscles? Group of answer choices a)Decreased sympathetic stimulation of arteriolar smooth muscles b)Increased parasympathetic stimulation of arteriolar smooth muscles c)Autoflow regulation d)Active hyperemiaCompared 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.Answer ALL parts of this question. In terms of heart failure there is a decrease in cardiac output. This is due to a contractile deficit in the individual cardiac myocytes. (a) Explain how this contractile deficit occurs. (b) What common cardiac problem is often associated with the changes in calcium handling often seen in cardiac cells of heart failure patients? Explain how this problem arises. (c) Describe the mechanism of action of levosimendan in the treatment of heart failure.
- Excess extracellular potassium functions to: (A) decrease the resting membrane potential of the ventricular contractile celle (B) decrease the force of contraction (C) initially increase the heart rate (D) A and B (E) all of the aboveDuring work, blood flow through a muscle can increase 20 times but the cardiac output does not increase as much, this is because a) vasoconstriction of the skin circulation, at least temporarily b) vasodilation of the blood vessels in the working muscles c) the blood supply to the gastrointestinal tract is reducedAs blood vessels increase in diameter, the amount of smooth muscle decreases and the amount of connective tissue increases. Explain why. (Hint: Remember Laplace's law)
- Myogenic behavior of arterioles:A) depends upon the intrinsic response of vascular smooth muscle to changes in transmural pressure. B)is probably not important in autoregulation.C)permits vessel wall tension to increase in direct proportion to transmural pressure. D) Requires sympathetic innervationsE)is a transient response that diminishes within secondsThe mineral ion needed for the formation of blood clot is : (A) Potassium (B) Sodfrym (C) Calcium (D) IronWhich of the following is a circulatory adjustment to sustained moderate exercise? A. Constriction of the cutaneous circulation B) Decreased intestinal blood flow C. Decreased venous return D. Increased renal blood flow E) Increased total peripheral vascular resistar
- Increased CO2 levels in tissues would promote, (a) contraction of precapillary sphincters. (b) an increase in the pH of the blood. (c) relaxation of precapillary sphincters. (d) a decrease of blood flow to tissues.(a) Name the type of blood vessel labelled (i) C. (ii) D. (b) In which direction does blood in vessel A travel? (c) Which of the four blood vessels contains the most oxygen? (d) What happens to the amount of oxygen in the blood as it passes through the body organs? (e) What is the chamber of the heart labelled X? ·Identify the incorrect statment about blood vessels (A) arteries are carrying a higher blood pressure than veins (B) skeletal muscle can assist veins with the movement of blood (C) crossing your legs is a ish factor for varicose veins (D) veins and arteries have valves