Describe how the intensity of exercise affects how much glucose and glycogen the body uses
What will be an ideal response?
Muscles use carbohydrates for energy during exercise of any intensity, but the amount used varies with intensity. As the intensity of exercise increases, so does the use of glucose and glycogen for energy. At very high exercise intensities, most of the body's energy needs is supplied by carbohydrates in the form of muscle glycogen. At moderate exercise intensities, carbohydrates provide about one-half to two-thirds of the energy needed by working muscles. (The rest is provided by fat.) At low to moderate intensity, fat is the body's primary energy source, but glucose in the bloodstream still provides some energy.
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In large doses, niacin has been shown to lower blood levels of __________.
A. LDL B. triglycerides C. HDL D. glucose
The rate at which energy is used by the body when it is at complete rest is called:
a. sleeping metabolic rate. b. resting metabolic rate. c. fasting metabolic rate. d. body composition.
Discuss in detail the digestion, absorption, and transport of dietary lipids, including the sterols
What will be an ideal response? Fat digestion starts off slowly in the mouth, with some hard fats beginning to melt when they reach body temperature. A salivary gland at the base of the tongue releases an enzyme (lingual lipase) that plays an active role in fat digestion in infants, but a relatively minor role in adults. In infants, this enzyme efficiently digests the short- and medium-chain fatty acids found in milk. In a quiet stomach, fat would float as a layer above the watery components of swallowed food. But whenever food is present, the stomach becomes active. The strong muscle contractions of the stomach propel its contents toward the pyloric sphincter. Some chyme passes through the pyloric sphincter periodically, but the remaining partially digested food is propelled back into the body of the stomach. This churning grinds the solid pieces to finer particles, mixes the chyme, and disperses the fat into small droplets. These actions help to expose the fat for attack by the gastric lipase enzyme—an enzyme that performs best in the acidic environment of the stomach. Still, little fat digestion takes place in the stomach; most of the action occurs in the small intestine.
Which of the following does not describe a formal leader? a. This individual has no titles or authority
b. This individual has the ability to recognize leadership traits in others. c. This individual has a position and title. d. This individual is usually a manager.