Nursing Elites

1. What is the correct formula for potassium chloride?

• A. NaCl
• B. KCl
• C. KCl
• D. ClK

Correct answer: B

Rationale: The correct formula for potassium chloride is KCl. In chemical formulas, the symbol for the cation (positive ion) comes first followed by the symbol for the anion (negative ion). Potassium is represented by the symbol K, while chloride is represented by the symbol Cl. Therefore, the formula for potassium chloride is KCl. Choice A (NaCl) is the formula for sodium chloride, not potassium chloride. Choice C is a duplicate of choice B, and choice D (ClK) is an incorrect arrangement of the symbols for potassium and chloride.

2. Which gland produces the hormone melatonin?

• A. Pineal gland
• B. Thyroid gland
• C. Pituitary gland
• D. Adrenal gland

Correct answer: A

Rationale: The correct answer is the Pineal gland. The pineal gland is responsible for producing melatonin, a hormone that helps regulate the sleep-wake cycle. Melatonin secretion is influenced by light exposure. Higher levels are observed at night to promote sleep, while lower levels during the day encourage wakefulness. Choices B, C, and D are incorrect as they are not associated with the production of melatonin. The thyroid gland produces hormones like thyroxine and triiodothyronine, the pituitary gland controls various other glands, and the adrenal gland produces hormones like adrenaline and cortisol.

3. What is the primary function of platelets?

• A. To fight infections
• B. To clot blood
• C. To carry oxygen
• D. To transport nutrients

Correct answer: B

Rationale: The primary function of platelets, or thrombocytes, is to clot blood. Platelets play a crucial role in hemostasis by forming clots to prevent excessive bleeding when injuries occur. They are not directly involved in fighting infections, carrying oxygen, or transporting nutrients. Therefore, the correct answer is B.

4. A remedy may cure certain ailments. Another word for this might be ___________.

• A. inoculation
• B. indicator
• C. nostrum
• D. serum

Correct answer: C

Rationale: A "nostrum" is a term used to describe a questionable or untested remedy or medication that claims to cure ailments. In this context, as a remedy is suggested to cure certain ailments, "nostrum" fits best in providing an alternative word that aligns with the situation. The other choices are not synonyms for a remedy that cures ailments. 'Inoculation' refers to the introduction of a vaccine, 'indicator' is something that provides information or signals, and 'serum' is a component of blood or a medication, none of which directly align with the concept of a remedy curing ailments.

5. Which sentence uses 'etc.' grammatically correct?

• A. The list included diseases such as flu, measles, etc.
• B. The list included flu, measles, etc., and other items.
• C. The list included flu, measles, etc., diseases, and other items.
• D. The list included, flu, etc., measles, diseases, and other items.

Correct answer: A

Rationale: The correct usage of 'etc.' should follow a comma when concluding a list. Option A correctly places 'etc.' at the end of a logical list with a comma before it, following grammatical rules. In option B, a comma should be placed after 'etc.' before introducing 'and other items.' Options C and D either misplace commas or incorrectly use 'etc.' within the list.

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