Exam 27: Nutrition and Digestion

Some animals have part of their guts modified into a muscular area that grinds food against small pebbles or sand grains collected from the environment. Which of the following statements about this area is false?

Which of the following packs the most calories per gram?

Food passing though our digestive tract would contain the fewest nutrients in the

The ____________________ is the organ that contracts to mix food particles with acid and enzymes, and also holds food until it can pass farther along for continued digestion.

As nutrients move across an intestinal villus, capillaries absorb

In which of the following animals would you expect to find the longest small intestine relative to its total body size?

If you were a bird about to embark on a long migratory journey, which of the following would you want to have stored in large quantities?

The human liver produces bile, a substance that

The first enzymes that food encounters in our body are in our

Which amino acids are humans unable to synthesize?

What is the best way to control your weight and live longer?

____________________ are not nutrients, do not provide us with energy, and are required only in small quantities; however, they help regulate metabolic processes.

How rapidly an organism can absorb nutrients generally depends on

Digestive ____________________, such as amylase, break specific chemical bonds to help organisms process their food.

Which of the following would not be found in the lower small intestine?

Low levels of vitamin D have been linked to seasonal affective disorder, a condition that leads to depression in the winter. Would you expect dark-skinned people to be more or less prone to seasonal affective disorder?

Vitamins are either water soluble or ____________________ soluble.

Many longevity-enhancing nutrients such as fiber and antioxidants are found in ____________________-based foods.

Consider the parts of the digestive system, particularly the place where water is removed before feces are excreted. Which organ is the mostly likely to be responsible for a bout of diarrhea?

The eight essential amino acids required by adult humans