Basic pulmonary function tests available in the ambulatory setting include spirometry and pulse oximetry; these tests provide physiologic measures of pulmonary function and can be used to quickly narrow a differential diagnosis and suggest a subsequent strategy of additional testing or therapy.
There are 257 calories in 1 Soft Taco with Beef, Cheese and Lettuce. Calorie breakdown: 41% fat, 37% carbs, 21% protein.
The Fresco Crunchy Beef Taco, Fresco Shredded Chicken Soft Taco and Fresco Steak Soft Taco each provide only 140 calories. Least Healthy Options on the Taco Bell Menu. Before you decide what you're going to order off the Taco Bell menu, you should know which foods to avoid. If you're trying to lose weight, stay lean, or you just want to live without post-Taco-Bell regret, stay away from these foods.