Bio 255 Exam 1 questions and Verified Answers

name the structure and whether it contains oxygenated or deoxygenated blood - ANSWER - right atrium; deoxygenated name the structure - ANSWER - aortic semilunar valve oxygen is carried by _______ cells. it binds to proteins called ______ that contain iron - ANSWER - erythrocytes; hemoglobin of the formed elements, which cells are responsible for immune function, clotting, and gas transfer-in that order? - ANSWER - leukocytes, platelets, erythrocytes what are the major functions of blood? (you must name 3) - ANSWER - 1) plays a role in immune function 2) temp regulation 3) pH regulation 4) gas/nutrients/ waste transport 5) regulates water loss a patient has a stroke volume of 70ml/beat, a heart rate of 70 beats/min, a mean arterial pressure of 100, systolic BP of 95 and diastolic BP of 60. calculate output of this patient - ANSWER - CO=SVxHR=70ml/beat/min=4900ml/min=4.9L/min which ions mediate the upstroke, plateau, and downstroke of a cardiac action potential. indicate the contraction phase that correlates to these events - ANSWER - upstroke=sodium; depolarization plateau=calcium; contraction downstroke=potassium; relaxation what are the three layers of the heart? - ANSWER - epicardium, myocardium, endocardium what is the fluid filled sac called that surrounds the heart? - ANSWER - pericardium when red blood cells get broken down, the iron molecule is transferred from the macrophage to the liver with which transfer protein? - ANSWER - transferrin Which wave indicates atrial depolarization? - ANSWER - P wave what makes up this component of whole blood? - ANSWER - serum, water, plasma proteins, nutrients, dissolved gases and electrolytes what type of white blood cell is displayed