Which of these best describes Earth’s mantle? A: Most dense layer, consists of the outer and inner parts
B: Thinnest under the oceans and thickest under continents
C: Middle layer, density increases with depth as pressure increases
D: Least dense layer overall, consists of two layers of different thickness

protocol for imps extraction focusing on membrane protein extraction, solubilisation, and purification.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.