Answer:
D) four.
Explanation:
The two atria hold the blood that circulates away from the heart. The heart has four one-way valves, which open and close with each heartbeat. The tricuspid valve and the mitral valve are located between the atria and allow the blood to flow from the atria to the ventricles. Also you don't have to but mind marking Brainliest?
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The goal of carbohydrate loading is to increase your athletic performance by providing you with the energy you need to finish an endurance exercise with less exhaustion.
Because more carbohydrates are stored as glycogen in the muscles and liver, a diet heavy in carbohydrates improves both stamina and intermittent excellent performance.Carbohydrates have 4 calories per gram.
Increased muscular glycogen stores, which are known to extend exercise and enhance long-term performance, are a result of glucose loading.
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20-30 percent should be your percentage of daily fat intake average around.