39. Digestive System

Which food items are typical of an herbivorous diet?

Which of the following is acquired outside of an animal's diet?

Animals need two types of organic precursors from their food, __________, to serve as the raw materials for the synthesis of larger organic molecules.

A breakfast cereal advertises that it contains essential vitamins and minerals. In this context, the word essential means __________.

Which of the following are considered essential nutrients: (1) certain carbohydrates, (2) certain fatty acids, (3) certain amino acids, and/or (4) cholesterol?

In general, B vitamins function in your body as __________.

B vitamins should be consumed daily, but vitamin A can be consumed more sporadically. Why is this true?

The fat-soluble vitamins include __________.

__________ are needed in the diet as components of teeth and bone, as parts of certain enzymes, for normal muscle and nerve function, and for water balance.

An insufficient supply of chemical energy in the diet or a shortage of one or more essential nutrients results in which of the following?

Despite long days grazing on tall grasses, several of the cattle released into a new pasture have oddly shaped or broken legs and often lie down. These cattle might be suffering from __________.

Which of the following statements about nutrition and digestion is true?

Which of the following statements is true?

Which of the following animals has a gastrovascular cavity with a single opening?

Which of the following animals uses only intracellular digestion?