Answer: HDL (High density lipoprotein), LDL (Low density lipoprotein)
Step-by-step explanation:
The high density lipoproteins are considered as good cholesterol as they remove the bad cholesterol or low density lipoprotein from the arteries. The LDL removed by them is transported back to the liver. This allows the supply of blood through these arteries. The low density lipoprotein when get build up in the artery walls can restrict the supply of blood through arteries. Arteriosclerosis involves the thickening and the loss of elasticity of the arterial walls which is caused by the deposition of the low density lipoprotein in the arterial walls and this leads to the formation of plaque which restricts the blood flow and may cause hypertension.