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. Digeson of food in the stomach
One of the main funcons of the respiratory system is to facilitate the exchange of gases between the body and the environment. During inhalaon, air enters the lungs and oxygen is absorbed into the bloodstream. During exhalaon, carbon dioxide is removed from the body and expelled into the environment.
Therefore, the Correct Answer is C.
More Questions on TEAS 7 Science
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Q #1: Which of the following types of RNA carries amino acids to the ribosome during protein synthesis?
A. Messenger RNA
B. Ribosomal RNA
C. Transfer RNA
D. Small nuclear RNA
Answer Explanation
Transfer RNA (tRNA) is a type of RNA molecule that carries amino acids to the ribosome during protein synthesis. Each tRNA molecule has a specific sequence of three nucleotides called an anticodon, which pairs with a complementary codon in the messenger RNA (mRNA) sequence. Each tRNA also carries a specific amino acid that corresponds to the codon it recognizes, allowing the ribosome to link the amino acids together in the correct order to form a protein.
In contrast, messenger RNA (mRNA) carries the genetic information from the DNA to the ribosome, where it serves as a template for protein synthesis. Ribosomal RNA (rRNA) is a component of the ribosome itself, where it helps to catalyze the formation of peptide bonds between amino acids. Small nuclear RNA (snRNA) is involved in splicing of pre-mRNA molecules during post-transcriptional processing.
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Q #2: Which part of the respiratory system is responsible for regulate breathing rate and depth?
A. Bronchi
B. Alveoli
C. Diaphragm
D. Trachea
Answer Explanation
The diaphragm is responsible for regulang breathing rate and depth. It is a dome-shaped muscle located at the botom of the chest cavity that contracts and relaxes to help move air in and out of the lungs.
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Q #3: What is the difference between innate and adaptive immunity?
A. Innate immunity is present at birth while adaptive immunity is acquired after exposure to pathogens.
B. Innate immunity is acquired after exposure to pathogens while adaptive immunity is present at birth.
C. Innate immunity is mediated by antibodies while adaptive immunity is mediated by T cells.
D. Innate immunity provides long-term protection while adaptive immunity provides only short-term protection.
Answer Explanation
Innate immunity and adaptive immunity are two arms of the immune system that work together to protect the body from pathogens. Innate immunity is the first line of defense and is present at birth. It includes physical and chemical barriers such as the skin, mucous membranes, and antimicrobial peptides, as well as cells such as macrophages and natural killer cells that can quickly recognize and atack pathogens. Innate immunity is nonspecific, meaning it responds to a wide variety of pathogens in a similar way.
Adaptive immunity, on the other hand, is acquired after exposure to pathogens. It involves the production of antibodies and activation of T cells, which are specific to particular pathogens. Adaptive immunity takes longer to develop than innate immunity, but it provides a more specific and targeted response to pathogens. Once the adaptive immune system has been activated against a particular pathogen, it can provide long-term protection against future infections with that pathogen.
Option b) is incorrect because innate immunity is nonspecific while adaptive immunity is specific. Option c) is incorrect because antibodies are a part of adaptive immunity while T cells can be a part of both innate and adaptive immunity. Option d) is incorrect because adaptive immunity can provide long-term protection, while innate immunity provides immediate but short-lived protection.
