Question 10 (1 point) Smoking increases the risk for CHD by: promoting dissolving of blood clots damaging the inner lining of arteries increasing oxygen level in the blood decreasing carbon monoxide in the blood

## Step 1<br />The question is asking about the impact of smoking on the risk of Coronary Heart Disease (CHD). The options provided are:<br />- promoting dissolving of blood clots<br />- damaging the inner lining of arteries<br />- increasing oxygen level in the blood<br />- decreasing carbon monoxide in the blood<br /><br />## Step 2<br />We need to evaluate each option based on the known effects of smoking on the cardiovascular system.<br /><br />## Step 3<br />The first option, "promoting dissolving of blood clots", is not a direct effect of smoking. While smoking can increase the risk of clot formation, it does not promote the dissolution of blood clots.<br /><br />## Step 4<br />The second option, "damaging the inner lining of arteries", is a well-documented effect of smoking. Smoking damages the inner lining of arteries, leading to a condition called atherosclerosis. This condition increases the risk of CHD.<br /><br />## Step 5<br />The third option, "increasing oxygen level in the blood", is not a direct effect of smoking. In fact, smoking decreases the oxygen level in the blood.<br /><br />## Step 6<br />The fourth option, "decreasing carbon monoxide in the blood", is also not a direct effect of smoking. Smoking actually increases the level of carbon monoxide in the blood.