Nursing Elites

1. If an atom has 32 neutrons, 17 protons, and 19 electrons, what is its charge?

• A. Positive
• B. Negative
• C. Neutral
• D. Cannot be determined

Correct answer: A

Rationale: An atom's charge is determined by the difference between the number of protons and electrons. Since the atom has 17 protons and 19 electrons, the net charge is positive. The excess of two electrons compared to protons results in a positive charge. Choice B (Negative) is incorrect because the atom has more protons than electrons, leading to a positive charge. Choice C (Neutral) is incorrect because the atom has an imbalance between protons and electrons, resulting in a charge. Choice D (Cannot be determined) is incorrect as the charge can be determined based on the given information.

2. At which of the following ages would ossification most likely take place to replace cartilage at the growth plate?

• A. 5
• B. 18
• C. 42
• D. 91

Correct answer: B

Rationale: Ossification, the process where cartilage is replaced by bone, typically occurs during adolescence, around the age of 18. This is when the growth plates in the bones close, and the bones stop growing in length, leading to the replacement of cartilage with bone tissue. Choice A (5) is incorrect because ossification primarily occurs during adolescence, not early childhood. Choice C (42) is incorrect as ossification is completed well before this age, usually during the late teens or early twenties. Choice D (91) is incorrect as ossification is a process that occurs earlier in life, typically during adolescence, and is not a process that occurs in advanced age.

3. What is the primary function of the digestive system?

• A. To break down food into nutrients
• B. To absorb oxygen
• C. To produce energy
• D. To regulate body temperature

Correct answer: A

Rationale: The correct answer is A: 'To break down food into nutrients.' The primary function of the digestive system is to break down food into nutrients that can be absorbed by the body for energy, growth, and repair. The digestive system is not responsible for absorbing oxygen (Choice B), as that is the role of the respiratory system. While the digestion process does release energy from nutrients, the primary function is not to produce energy (Choice C), but rather to extract nutrients for energy production. Regulating body temperature (Choice D) is primarily handled by the thermoregulatory mechanisms in the body, such as the skin and sweat glands, not the digestive system.

4. What is cystitis an inflammation of?

• A. Kidneys
• B. Bladder
• C. Ureters
• D. Urethra

Correct answer: B

Rationale: Cystitis is an inflammation of the bladder. It is typically caused by a bacterial infection and can lead to symptoms such as frequent urination, pain or burning during urination, and lower abdominal discomfort. The inflammation specifically affects the bladder lining. Choices A, C, and D are incorrect. Kidneys are not the site of inflammation in cystitis; they are associated with conditions like pyelonephritis. Ureters are tubes that connect the kidneys to the bladder, and the urethra is the tube that carries urine from the bladder to outside the body. Therefore, the correct answer is 'Bladder.'

5. What is the scientific name for the common housefly?

• A. Musca domestica
• B. Drosophila melanogaster
• C. Apis mellifera
• D. Anopheles gambiae

Correct answer: A

Rationale: Musca domestica is the scientific name for the common housefly. This species is known for being a common pest found in and around human habitations. Drosophila melanogaster (option B) is a species of fruit fly commonly used in genetic research. Apis mellifera (option C) is the scientific name for the western honeybee. Anopheles gambiae (option D) is a species of mosquito known for being a vector of malaria.

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