Which of the following is a function of the respiratory system?
A. Transport of nutrients to the body
B. Pumping of blood to the lungs
C. Exchange of gases between the body and the environment
D. Digestion of food in the stomach
One of the main functions of the respiratory system is to facilitate the exchange of gases between the body and the environment. During inhalation, air enters the lungs and oxygen is absorbed into the bloodstream. During exhalation, carbon dioxide is removed from the body and expelled into the environment.
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Therefore, the Correct Answer is C.
More Questions on TEAS 7 Science
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Q #1: Which of the following is responsible for carrying amino acids to ribosomes during protein synthesis?
A. tRNA
B. mRNA
C. rRNA
D. DNA
Answer Explanation
Transfer RNA (tRNA) is responsible for carrying amino acids to ribosomes during protein synthesis. Each tRNA molecule has a specific anticodon that matches a codon on the messenger RNA (mRNA) molecule. The tRNA molecule binds to the mRNA codon and brings the corresponding amino acid to the ribosome, where it is added to the growing polypeptide chain.
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Q #2: What is the difference between a monosaccharide and a disaccharide?
A. Monosaccharides are composed of two sugar molecules while disaccharides are composed of a single sugar molecule.
B. Monosaccharides are simple sugars that cannot be further broken down into simpler sugars while disaccharides are composed of two simple sugars.
C. Monosaccharides are only found in plants while disaccharides are only found in animals.
D. Monosaccharides are used for energy storage while disaccharides are used for structural purposes.
Answer Explanation
Carbohydrates are one of the main types of biomolecules and are composed of monomers called monosaccharides. Monosaccharides are simple sugars that cannot be further broken down into simpler sugars. They are usually composed of 3 to 7 carbon atoms and have a general formula of (CH2O)n, where n is a number between 3 and 7. Examples of monosaccharides include glucose, fructose, and galactose.
When two monosaccharides are joined together by a glycosidic bond, they form a disaccharide. Disaccharides are composed of two simple sugars and can be broken down into their constituent monosaccharides by hydrolysis. Examples of disaccharides include sucrose, lactose, and maltose.
Option a) is incorrect because it describes the composition of a disaccharide, not a monosaccharide. Option
c) is incorrect because both monosaccharides and disaccharides can be found in both plants and animals.
Option d) is incorrect because both monosaccharides and disaccharides can be used for energy storage and
structural purposes, depending on their specific structure and function in the organism.
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Q #3: Which of the following units is used to indicate length?
A. kg
B. L
C. s
D. m
Answer Explanation
The unit used to indicate length is the meter (m). It is the base unit of length in the International System of Units (SI).
