The term "mutations" refers to:
permanent, inheritable changes to DNA
an organism that is capable of causing disease
the severity of a disease that an organism is able to cause
a substance that can inhibit the growth of bacteria
The Correct Answer is A
A. Permanent, inheritable changes to DNA:
Mutations are alterations or changes in the DNA sequence of an organism's genome. These changes can be permanent and heritable, meaning they are passed on to offspring during reproduction. Mutations can occur spontaneously or be induced by various factors such as environmental agents, radiation, or errors in DNA replication or repair mechanisms. These changes can lead to variations in traits among individuals within a population and are essential for the process of evolution.
B. An organism that is capable of causing disease:
This definition refers to the term "pathogen." Pathogens are organisms, such as bacteria, viruses, fungi, or parasites, that are capable of causing disease in their hosts. Pathogens can infect humans, animals, plants, or other organisms and can lead to a wide range of diseases, from mild infections to life-threatening illnesses.
C. The severity of a disease that an organism is able to cause:
This definition refers to the term "virulence." Virulence is a measure of the severity or harmfulness of a pathogen, indicating its ability to cause disease in a host organism. Highly virulent pathogens are more likely to cause severe illness or death, while less virulent pathogens may cause milder symptoms or asymptomatic infections. Virulence factors, such as toxins, adhesion molecules, or evasion mechanisms, contribute to the pathogen's ability to cause disease.
D. A substance that can inhibit the growth of bacteria:
This definition refers to the term "antibiotic." Antibiotics are chemical substances produced by microorganisms, fungi, or synthesized in the laboratory that can inhibit the growth of or kill bacteria. Antibiotics are commonly used to treat bacterial infections and work by targeting specific bacterial structures or metabolic processes, thereby disrupting bacterial growth and survival. However, antibiotics are not mutations; instead, they are therapeutic agents used to combat bacterial infections.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. "Expect your urine to turn pink or red while taking this medication."
This statement is incorrect. Vancomycin does not typically cause urine discoloration. However, red man syndrome, characterized by flushing of the skin, particularly on the face and upper body, can occur with rapid infusion of vancomycin. This is not related to urine color change.
B. "Discontinue the medication once your symptoms subside."
This statement is incorrect. It's crucial for the client to complete the full course of antibiotics as prescribed, even if symptoms improve before completing the treatment course. Discontinuing the medication prematurely can lead to the development of antibiotic resistance and recurrence of the infection.
C. "Notify your provider if you experience any changes in your hearing."
This statement is correct. Vancomycin can potentially cause ototoxicity, which may manifest as changes in hearing, including ringing in the ears (tinnitus) or hearing loss. Clients should be instructed to report any such symptoms to their healthcare provider promptly.
D. "Decrease your fluid intake to 1000ml per day."
This statement is incorrect. Adequate hydration is essential, especially when taking medications like vancomycin, to help prevent kidney damage and promote drug elimination. Restricting fluid intake is not advisable unless specifically instructed by the healthcare provider for a particular medical reason.
Correct Answer is D
Explanation
A. Sulfonamides:
Sulfonamides are a class of antibiotics that are structurally distinct from cephalosporins like cefazolin. Allergic reactions to sulfonamides do not necessarily indicate a risk of allergy to cefazolin. However, it's still important to assess for any previous allergic reactions to medications, including sulfonamides, as individuals can have multiple medication allergies.
B. Macrolides:
Macrolides are another class of antibiotics that are structurally different from cephalosporins. Allergic reactions to macrolides do not directly indicate an allergy to cefazolin. However, as with sulfonamides, it's crucial to assess for any history of allergic reactions to medications, including macrolides.
C. Yeast:
Yeast is not a class of antibiotics but rather a type of fungus. Allergic reactions to yeast are unrelated to cephalosporin antibiotics like cefazolin. Therefore, a history of allergic reactions to yeast does not suggest an allergy to cefazolin.
D. Penicillin:
This is the correct choice. Penicillins and cephalosporins share a similar beta-lactam ring structure. Individuals who have had allergic reactions to penicillin may have an increased risk of cross-reactivity with cephalosporins, including cefazolin. Therefore, it's crucial to assess for any previous allergic reactions to penicillin before administering cefazolin to avoid potential allergic reactions or adverse effects.
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