[Trachea, monkey; x-section, PTS]. The lumen of the trachea is lined by pseudostratified columnar epithelium. Note that all the surface cells have cilia at their free (apical) surface.(What function do these cilia serve in the trachea?) Mucus-secreting unicellular gland cells (goblet cells) are interspersed among the ciliated cells.Trachea, monkey; x-section, PTS]. The lumen of the trachea is lined by pseudostratified columnar epithelium. Note that all the surface cells have cilia at their free (apical) surface.
Complex Carbs on Restrictive Low-Carb Diets. If you're on a restrictive low-carb diet, you may be limited to just 20 grams of net carbs per day. That excludes virtually any food rich in complex carbohydrates, as a single serving of any of the previously mentioned foods contains more than your daily limit.
According to the 2010 Dietary Guidelines for Americans, carbohydrates should make up 45 to 65 percent of a person's total daily calorie intake. Any amount less than this could be considered low carb. For someone consuming 2,000 calories a day, this is about 225 to 325 grams of carbohydrates per day.Most low-carb diets limit carbohydrate intake to between 50 to 150 grams per day, depending on the diet.ny amount less than this could be considered low carb. For someone consuming 2,000 calories a day, this is about 225 to 325 grams of carbohydrates per day.