Question

(d) All of these
2. The blood group which can receive blood
from all the four blood groups is
(a) A
(b) AB
(C) B
a(d) o o
3. Which one is not correct about veins? ?
ut of (a) Veins are thick-walled
. (b) Veins have valves to maintain
v unidirectional blood flow
boy (c) Veins are collecting vessels
(d) Blood in veins flows towards heart
4. Which one of the following statement is
correct?
(a) Pulmonary vein carries deoxygenated
blood to left ventricle
(b) Pulmonary vein carries deoxygenated
blood to right auricle
(c) Pulmonary vein carries oxygenated
blood to left auricle
(d) Pulmonary vein carries deoxygenated
blood to left auricle
5. Tissue fluid is
(a) Intracellular fluid
(b) Extracellular fluid
(c) Lymph
(d) Plasma​

Answer 1

Answer:

Answer

Explanation:

Answer

i. Arteries have thick, elastic walls and narrow lumen while veins have thinner, scarcely elastic walls and wide lumen.

ii. Angina Pectoris is a pain in the chest due to deprived oxygen the heart muscle experience constricting pain. This is not a fatal condition and the pain passes off quickly.

iii. Persons with blood group AB is a universal recipients. It has both the antigens A and B but no bodies.

iv. During clot, Thromboplastin helps in the formation of an enzyme prothrombinase. This enzyme inactivates heparin and it also converts the inactive plasma protein prothrombin into its active form, thrombin. Both changes require calcium ions.

So, the correct answer is 'i and iv'.