Why is a 100% fat-free diet unhealthy? a. fat-free foods have unnatural additives to make them taste better. b. dietary fat is necessary for carbohydrate absorption. c. essential fatty acids must be obtained from the diet. d. the body cannot obtain enough energy from food if no fat is present?

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.