Amedical researcher measured the diastolic wall thicknesses of the arteries in a young, healthy test subject. the test subject came back 20 years later to have the measurements repeated. the measurements revealed that the subject's artery walls were half as thick as they were originally. which of the following is the most likely long-term effect if the measured trend continues? a) arteries and veins will fuse, causing oxygenated and deoxygenated blood to mix. b) arteries will be unable to withstand the pressure exerted by the heart, causing an aneurysm. c) blood volume will increase, causing the kidneys to work harder to maintain blood pressure. d) blood pressure will decrease, causing nausea, dizziness, loss of consciousness, and potential death.

b) Arteries will be unable to withstand the pressure exerted by the heart, causing an aneurysm.

Explanation:

Arteries are the blood vessels with thick wall and narrow cavities. Arteries receive blood by pumping of the heart and their thick wall makes them able to bear the resulting high blood pressure of blood. Continuous thinning of walls of arteries would make susceptible to rupture due to high blood pressure. The person may develop an aneurysm in which the thin walls of arteries bulge out by high pressure of blood.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.