Briefly describe the lymphatic system, including how it differs from the vascular system
What will be an ideal response?
The lymphatic system provides a one-way route for fluid from the tissue spaces to enter the blood. Unlike the vascular system, the lymphatic system has no pump; instead, lymph circulates between the cells of the body and collects into tiny vessels. The fluid moves from one portion of the body to another as muscles contract and create pressure here and there. Ultimately, much of the lymph collects in the thoracic duct behind the heart. The thoracic duct opens into the subclavian vein, where the lymph enters the bloodstream. Thus nutrients from the GI tract that enter lymphatic vessels (large fats and fat-soluble vitamins) ultimately enter the bloodstream, circulating through arteries, capillaries, and veins like the other nutrients, with a notable exception—they bypass the liver at first.
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Reyna is a competitive endurance athlete who weighs 65 kg. She would like to plan a nutritionally adequate diet that provides enough carbohydrate to maintain her weight and glycogen stores during days in which she spends 1 to 3 hours training for events. According to expert recommendations, she should consume ________ grams of carbohydrate daily while training.
A. 120 to 340 B. 390 to 650 C. 190 to 460 D. 220 to 530
With advancing age there are fewer cells producing gastric secretions, which leads to atrophic gastritis and a lack of intrinsic factor needed to absorb:
1.calcium. 2.folate. 3.iron. 4.vitamin B12.
Which of the following is a limitation to the value of a 24-hour recall?
a. The process is time consuming. b. Clients often keep poor records. c. The method excludes recording of beverages. d. A 24-hour period may not be typical.
Flaxseed oil is a particularly rich source of alpha-linolenic acid.
Answer the following statement true (T) or false (F)