19. what would occur if the muscle tissue failed within a damaged blood vessel?

a. vascular spasm would not occur, resulting in excessive blood loss.
b. coagulation would not occur, preventing fibrin formation.
c. platelet aggregation would not occur, preventing plug formation.
d. endothelial cell division would not occur, preventing wound healing.

A. Vascular spasm would not occur, resulting in excessive blood loss.

Explanation:

The walls of blood vessels consist of smooth muscles to perform involuntary contraction to support the pumping of blood. Any damage to blood vessels results in sudden contraction of smooth muscles and is called as vascular spasm. The vascular spasm serves to constrict the blood flow so as to prevent blood loss. If smooth muscles do not work, vascular spasm would not occur leading to excessive blood loss.

when it is at an intermediate population density

1. amino acid refers to the fundamental building block of proteins, comprising of an amino group and a carboxyl group.

2. catalyst refers to any substance, which increases the rate of chemical reaction without being used up in the reaction.

3. a complex molecule containing he genetic code is dna or deoxyribonucleic acid.

4. an enzyme refers to a molecule of protein, which is unique in accelerating up a particular chemical reaction in the biological systems.

5. nucleic acid refers to an sequence of sugars, phosphates, and nitrogenous bases, for example, dna and rna.

6. a protein refers to a large, composite organic molecule comprising of a huge number of amino acids associated together with the of peptide bonds.

7. rna refers to a nucleic acid that takes part in the production of proteins.

8. substrate refers to a compound, which takes part in a chemical reaction, and is chemically modified by the reaction.