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Chapter 45: Problem 1

Required molecules that animals cannot synthesize are called: a. nutrients. b. essential nutrients. c. enzymes. d. proteins. e. carbohydrates.

Short Answer

Expert verified
The correct answer is b. Essential nutrients.

Step by step solution

01

Analyze given options

Consider each option one by one, comparing them with the condition mentioned in the question. A nutrient is a substance that provides nourishment. An essential nutrient is a nutrient that the body cannot synthesize on its own or not to an adequate amount and must be provided by the diet. Enzymes are proteins that act as biological catalysts. Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Carbohydrates are biomolecules consisting of carbon (C), hydrogen (H) and oxygen (O) atoms.
02

Comparative Analysis

From the provided options, enzymes, proteins, and carbohydrates can indeed be synthesized by animals, so they do not meet the criteria. A nutrient is a broad term that includes all substances providing nourishment, so it may not necessarily be the one that animals can't synthesize. The term 'essential nutrients' specifically refers to nutrients that must be provided from the diet because they can't be synthesized adequately or at all by the animal.
03

Identify the correct option

Based on the condition mentioned in the question and the specific definitions of each term, the term 'essential nutrients' is the one that is specifically referred to as those substances which cannot be synthesized by animals. So, the correct answer is 'essential nutrients'.

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Most popular questions from this chapter

Which of the following best describes regulation of digestion? a. GIP inhibits insulin release from the pancreas. b. Gastrin stimulates pancreatic secretion of \(\mathrm{HCl}\) and pepsinogen. c. Secretin stimulates gastric emptying into the duodenum. d. CCK stimulates gastric activity to activate the duodenum. e. Leptin binds different hypothalamic receptors to stimulate or inhibit appetite.

Which of the following accurately describes a feeding style? a. Deposit feeders obtain nutrients from organic molecules in solution. b. Deposit feeders scrape organic matter from solid material on which they live. c. Fluid feeders digest organisms suspended in water. d. Fluid feeders strain food with networks of mucus or bristles and hairs. e. suspension feeders consume sizable food whole or in chunks.

An example of a digestive specialization is seen in: a. the long intestines characteristic of herbivores. b. the incisors being the dominant teeth in wolves. c. the canine teeth being the dominant teeth in deer. d. salivary lipase being made by humans. e. cellulose being made by humans.

All of the following are essential nutrients in humans except: a. vitamin B. b. calcium. c. glycogen. d. linoleic acid. e. vitamin \(\mathrm{K}\).

The liver's role in digestion is to: a. synthesize aminopeptidase and dipeptidase to digest polypeptides. b. synthesize lipase to form free fatty acids. c. secrete trypsin to break the bonds in polypeptides. d. secrete bile and bicarbonate ions to help emulsify fats. e. store bile between meals.
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