06:00Hypertension | Blood Pressure Regulation | Hypotension | Dr Najeeb LecturesDr. Najeeb Lectures916views
04:30Cardiac cycle, stages, physiology, Diastole and systole in the cardiac cycle.Medical Centric1282views
06:09"Basic Cardiac Anatomy and Physiology" by Nancy Braudis for OPENPediatricsOPENPediatrics661views
10:50Cardiology - Heart Physiology I (Cardiac Myocyte and Membrane Potential)Armando Hasudungan578views
Multiple ChoiceA recording of the electrical activity of a patient's heart shows that the atria are contracting regularly and normally, but every few beats the ventricles fail to contract. Which of the following is probably functioning improperly? 1130views
Multiple ChoiceYour blood pressure is 120/70. The "120" indicates __________, and the "70" indicates __________. 746views1rank
Multiple ChoiceWhen we compare the structures and functions of arteries and veins, we find that the walls of arteries are __________, the blood pressure inside arteries is __________, and the blood in arteries is moving __________ the heart. 786views
Multiple ChoiceA mutation that results in a nonfunctioning nitric oxide receptor would cause __________. 423views
Textbook QuestionBlood pressure is highest in _________ , and blood moves most slowly in _________ . a. veins; capillaries b. arteries; capillaries c. veins; arteries d. arteries; veins569views
Textbook QuestionWhen the doctor listened to Janet's heart, he heard 'lub-hiss, lub-hiss' instead of the normal 'lub-dup' sounds. The hiss is most likely due to _________ . (Explain your answer.) a. a defective atrioventricular (AV) valve b. a damaged pacemaker (SA node) c. a defective semilunar valve d. high blood pressure456views
Textbook QuestionPaul's blood pressure is 150/90. The 150 indicates _________ , and the 90 indicates _________ . a. pressure in the left ventricle; pressure in the right ventricle b. pressure during ventricular contraction; pressure during heart relaxation c. systemic circuit pressure; pulmonary circuit pressure d. pressure in the arteries; pressure in the veins416views
Textbook QuestionWhich of the following initiates the process of blood clotting? a. damage to the lining of a blood vessel b. conversion of fibrinogen to fibrin c. attraction of white blood cells to a site of infection d. conversion of fibrin to fibrinogen601views
Textbook QuestionBlood flows more slowly in the arterioles than in the artery that supplies them because the arterioles a. have thoroughfare channels to venules that are often closed off, slowing the flow of blood. b. have sphincters that restrict flow to capillary beds. c. are narrower than the artery. d. collectively have a larger cross-sectional area than does the artery.637views
Textbook QuestionSome babies are born with a small hole in the wall between the left and right ventricles. How might this affect the oxygen content of the blood pumped out of the heart into the systemic circuit?406views
Textbook QuestionJuan has a disease in which damaged kidneys allow some of his normal plasma proteins to be removed from the blood. How might this condition affect the osmotic pressure of blood in capillaries, compared with that of the surrounding interstitial fluid? One of the symptoms of this kidney malfunction is an accumulation of excess interstitial fluid, which causes Juan's arms and legs to swell. Can you explain why this occurs?355views
Textbook QuestionSCIENTIFIC THINKING The studies described in Module 23.6 were funded by both government agencies and major pharmaceutical and medical supply companies. NIH grants for research on heart disease total more than $1.2 billion per year. Gather more information and form an opinion on how heart disease research should be funded, whether by private enterprises such as pharmaceutical companies, donor-supported nonprofit organizations, or government agencies. Write an essay arguing your point of view.367views