Minimum Pass Grade: 50% Each question is worth 10 marks. 1. Fill in the words or
ID: 257842 • Letter: M
Question
Minimum Pass Grade: 50% Each question is worth 10 marks. 1. Fill in the words or phrases that best complete each sentence. Be as specific as possible. a. Erythrocytes contain the enzyme which catalyzes the conversion of metabolically produced CO2 and water into b. Most old erythrocytes are removed from circulation and destroyed by cells called as they rupture passing through the narrow capillaries of the organ called the continuously divide and to give rise to each of the types of blood cells. vasculature is known asOnce they leave the bloodstream to fight a c. Undifferentiated cells called reside i the bone marrow, where they d. The process of leukocytes squeezing through the capillary to exit the pathological condition, they never returrn e. The genetically-determined glycoprotein and glycolipid antigens found on the f. During embryonic development, ninety-nine percent of the cardiac fibers are g. The action potential delay at theensures that atrial excitation and surface of an erythrocyte are called , and a person with agglutinins that react with type A and blood type B has type blood. specialized for the function calledwhereas the remainder is specialized for contraction are complete before excitation and contraction commence. completed. An increase of this volume occurs when the stroke volume is h. The is the volume of blood in the ventricle after ejection has beern nt Page 2 of . The three cations, K', Ca2, and Na have an important effect of heart function. Increased blood levels of Na block force of contraction, while an excess of potentials. s inflow and results in a decrease in the blocks the generation of action has the following effect on stroke tic activity atrial contractility J. An increase in parasympathetic activity volume: An increase in parasympathe tn hare hnth diabetes insipidus and Addison's disease. HowExplanation / Answer
1 fill in the words or phases
a)erythrocyte contain an enzyme carbonic anhydrase,which catalyses the conversion of metabolically produced CO2 and water into carbonic acid.
b) Most Old erythrocytes are removed from circulation and destroyed by cells called macrophages,as they rupture passing through the narrow capillaries of th organ called the spleen, liver and red bone marrow.
c) undifferentiated cells called hematopoitic stem cells,reside in the bone marrow, where they continously divide and differentiate to give rise to each of the type of blood cells.
d) the process of leucocytes squeezing through the capillary walls to exit the vasculature is known as diapedesis once they live the blood stream to fight a pathological conditions, they never return.
e)the genetically determined glycoprotein and glycolipid antigens found on the surface of an erythrocyte are called agglutinogens and a person with agglutinins that react with type A and blood type B has type O blood.
f) During embryonic development, ninety-nine percent of the cardiac fibres are specialized for the function called contraction, whereas the remainder is specialized for inherent and rhythmical electrical activity(autorhythmic function)
g) the action potential delay at the atrioventricular node(AV node) ensures the atrial excitation and contraction are complete before ventricular excitation and contraction commence.
h) the end-systolic volume(ESV) is the volume of blood in the ventricle after ejection has been completed. an increase of this volume occurs when the stroke volume is decreased.
i)the three cations K+,Ca2+,and Na+ have an important effect of heart function. increasd blood levels of Na+blocks Ca2+ inflow and results in a decrease in the force of contraction, while an excess of K+ blocks the generation of action potentials.
j)an increase in parasympathetic activity stimulation has the following effect on stroke volume: decreases stroke volume ; an increase in parasympathetic activity weakens atrial contractility.