[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.
If you decide to use carbohydrate counting as your approach to meal planning, you'll learn how many grams of carbohydrates are in each of the foods you eat and keep track of how much you eat. In the carbohydrate counting method, 15 grams of carbohydrate is equal to one carbohydrate serving. How many grams of carbohydrate you need each day depends on how many calories you need to stay at a healthy weight. A woman who needs about 1,500 calories a day will aim for 180 to 195 grams of carbohydrate or about 12 to 13 carbohydrate servings a day.