What two types of macromolecules are the main components of myelin? A. carbohydrates and lipids B. proteins and nucleic acids C. phospholipids and proteins D. carbohydrates and nucleic acids E. water and proteins

Option C.

Explanation:

Myelin are insulating layer or sheath that surrounds axonal part of neurons of the brain and spinal cord . Myelin surrond nerve cells or neurons.

It contain protein and fatty substances. It is Rich in lipids which help in propagation of nerve impulses. The insulation improved the efficiency of signal transduction along the nerves cell.

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

the answer for this question would be d. glaciers