Bio 256 Exam 3 | Latest Update | Questions and well Answered Elaborations | 100% Correct | GRADED A.

Bio 256 Exam 3 (Latest Update) Questions and well Answered Elaborations (GRADED A). Which of the following surrounds the individual muscle cell? endomysium which of the following surrounds a bundle of myofibers perimysium in skeletal muscle, each myofiber is surrounded by endomysium a motor neuron and the myofibers it innervates is known as a(n) motor unit after nervous stimulation of the muscle cell has ceased, the acetylcholine is destroyed by actely choline esterase when a muscle fiber is stimulated by acetylcholine, ___ channels on the plasma membrane open Na++ the warm-up period reuired of athletes in order to bring their muscles to peak performance is called treppe in an isotonic contraction, the muscle changes in length and moves the load when increasing stimuli bring about more and more fibers in a contracted state, this is called recruitment Athletes sometimes complain of oxygen debt, a condition that results when insufficient oxygen is available to completely break down pyruvic acid. As a result, the pyruvic acid is converted to lactic acid the mechanism of contraction in smooth muscle parallels that of skeletal muscle in the following ways except the calcium-mediated regulation of contraction differs which of the following is a protective function of blood prevention of blood loss which of the following is true about blood plasma it is about 90% water the function of hemoglobin is to carry oxygen what organ in body regulates erythrocyte kidneys when old red blood cells are worn out, their components are recycled. the globin from the hemoglobin is metabolized as amino acids which would be associated with prematurely ruptured erythrocytes? hemolytic anemia which of the following is a precursor of a neutrophil? myeloblast No visible cytoplasmic granules are present in ________. monocytes a person with chronic leukemia is ___ likely to suffer a bacterial infection in/on their body more an individual who is blood type AB negative can receive any blood type in moderate amounts except those with the Rh antigen. Which is the correct sequence of events in a cardiac myocardial action potential? Na+ inward flux, Ca++ inward flux, K+ outward flux cardiac ischemia can result in a myocardial infarction which of the follow is NOT part of the conduction system of the heart atrioventricular valve initation of a normal heart beat is the responsibility of the sinoatrial node if the vagus nerve to the heart were cut, the result would be the heart rate would increase by about 25 beats per minute the time from the ventricular contractile myofibers are depolarized until they repolarize is represented by the S-T segment The P wave of a normal electrocardigram indidcates atrial depolarization normal heart sounds are caused by which of the following events closure of the heart valves During the period of ventricular filling blood flows from the atria and through the open atrioventricular valves which is the most important factor affect stroke volume preload Select the correct statement about cardiac output a slow heart rate increases end diastolic volume, stroke volume, and force of contraction which provides a positive chronotropic effect on the heart? norepinephrine the effect of endurance-type athletic training may be to lower the resting heart rate. this phenomenon is caused by hypertrophy of the heart muscle blood-by-passing a capillary bed flows through its metarteriole which blood vessel would you find has the highest blood pressure aorta factors aiding venous return include all except urinary output when you go quickly from sitting or lying down to standing too quickly, you feel dizzy. the drop in blood pressure stimulates vasoconstriction and increased heart rate to compensate. this is called baroreceptor reflex which will decrease blood pressure nitric oxide which will increase blood pressure antidiuretic hormone which is not a vital sign used to assess the cardiovascular system serum cholesterol blood pressure peaks each day (assuming awakening in the morning, and going to sleep at night) in the morning intense exercise can cause both of the above.. vasodilation to probide increased blood flow to skeletal muscles vasoconstrcition due to epinephrine binding alpha receptors to prevent muscle oxygen demands from excedding cardiac pumping capacity If plasma proteins are lost due to Kidney disease, then which of the following pressure changes occur as a result? blood colloid osmotic pressure dereases on an EKG, the __ wave represents atrial depolarization, while the __ wave represents ventricular depolarization P, QRS the Lubb heart sound occurs with the __ valves closing, while the Dub heart sound occurs as __ valves close atrioventricular, semilunar