Check all that are a function of the pericardium.1. prevent the heart from bouncing in the thoracic cavity2. prevent the heart from overfilling with blood3. aid the heart in the strength of contractions4. create a frictionless environment through the production of serous fluid

All the options are correct.

Explanation:

A pericardium is the sac that compass the heart , protects , lubricate and keep it in place.

The functions of pericardium are:

1. It keep the heart fixed in its place in the chest cavity.

2. It prevent the heart from stretching and overfilling with blood I.e it minimize blood infow.

3. It prevents friction by lubricating the heart.

4. It protects the heart from infection that might be nearby either from lungs or other organs.

c-reactive protein (crp) is an acute phase protein belonging to pentraxin family of proteins, whose levels increases 1000-fold or more in concentration in blood during the occurrence of an injury, inflammation or tissue death.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.