69) Hypotension is generally considered systolic blood pressure that is below 10
ID: 3479699 • Letter: 6
Question
69) Hypotension is generally considered systolic blood pressure that is below 100 mm Hg. 70) Vasodilation is a widening of the lumen due to smooth muscle contraction. 71) Although there are no sarcomeres, smooth muscle still possesses thick and thin filaments. 72) Arterial pressure in the pulmonary circulation is much higher than in the systemic circulation because of its proximity to the heart. 73) The force of muscle contraction is controlled by multiple motor unit summation or recruitment 74) The adjustment of blood flow to each tissue in proportion to its requirements at any point in time is termed autoregulation. 75) An increase in blood viscosity will cause an increase in peripheral resistance. 76) Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle. 77) Regardless of type, all levers follow the same basic principle: effort farther than load from fulcrum- mechanical advantage; effort nearer than load to fulcrum = mechanical disadvantage. 78) The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic valves. 79) Muscles connecting to the hyoid bone are important for swallowing and speech. 80) An ECG provides direct information about valve functionExplanation / Answer
69. FALSE Hypotension (low blood pressure) is considered systolic BP goes below 90mm hg and diastolic below 60mmhg.
70. TRUE vasodilatation is the dilatation or widening of blood vessels.
71. TRUE smooth muscle lack sarcomere. Smooth muscle cells possess thick and thin filament as well.
72. FALSE In the systemic circulation, through arteriolar regulation, blood is usually directed toward active tissue and away from inactive ones. In the pulmonary circulation, in normal circumstances, all the arterioles are open at once. Since the passageways for the blood in the lungs are all wide open, the resistance to its flow is much less than in the systemic circulation. The pulmonary arterial pressure is, consequently, much lower than the systemic arterial pressure. A typical pulmonary arterial pressure is 30 / 10 mm Hg, about one-fifth of systemic arterial pressure.
73. TRUE Muscle contraction depend upon how many muscle contraction unit are activated at once. Activation of one motor unit will lead to low muscle response where as activation of more muscle unit cause high muscle contraction.
74. FALSE
75. TRUE. The viscocity of blood is directly proportional to its resistance. As viscocity increases resistance also increases.
76. TRUE Coronary artery anastomoses help to circulate blood to the heart. But these anastomoses are very small to supply enough blood to heart. That is heart fails due to coronary artery blockage.
77. False
78. FALSE Lub sound or s1 sound of heart shows closure mitral And tricuspid calve. Dub or s2 sound of heart shows pulmonary or aortic valve closure.
79. TRUE muscles connwcted to hyoid bone help in swallowing as well the movements ot tongue useful for speech
80. FALSE ECG provides information about the electrical activity of the heart whereas echocardiogram provides information about heart valve disease
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.