L-6 Cardiovascular disease I

Question 1

AV valves and semilunar

Answer 1

AV = atrioventricular valve separate atrium and ventricle
semilunar controls the blood flow to aorta and pulmonary artery

Question 2

heart murmur

Answer 2

back flow of blood through a defective valve

Question 3

self excitable

Answer 3

contract without any signals from the nervous system

Question 4

SA node

Answer 4

sinoatrial or pacemaker sets rate and timing at which cardiac muscle cells contract

Question 5

what can the impulses in the cardiac cycle be recorded as

Answer 5

electrocardiogram

Question 6

blood composition

Answer 6

plasma
45% cellular elements

Question 7

plasma

Answer 7

-90% water
-contains inorganic salts in the form of dissolved ions (electrolyte)
-contains plasma protein that influences ph, osmotic pressure and viscosity
-functions: immunity, blood clotting, lipid transport

Question 8

red blood cells

Answer 8

erythrocytes
carry oxygen and carbon dioxide

Question 9

white blood cells

Answer 9

leukocytes
defence

Question 10

platelets

Answer 10

no other name
clotting

Question 11

5 types of white blood cells
where are they found?

Answer 11

• monocytes
• neutrophils
• basophils
• eosinophils
• lymphocytes
  they are found inside and outside the circulatory system
  produce antibodies and kill infected cells

Question 12

platelets: blood clotting

Answer 12

normal haemostasis