Nursing Elites

1. The organ systems responsible for integration and coordination are the nervous and endocrine systems.

• A. True
• B. False
• C. Not Sure
• D. None of the above

Correct answer: A

Rationale: The correct answer is True. The nervous and endocrine systems are indeed responsible for integration and coordination in the body. The nervous system uses electrical impulses to send signals quickly, while the endocrine system uses hormones to send chemical messages more slowly. Together, they work to regulate various bodily functions and maintain homeostasis. The other choices are incorrect as the statement accurately describes the roles of the nervous and endocrine systems in integration and coordination.

2. Which of the following structures, located at the end of the ear canal, vibrates when sound waves strike it?

• A. Acoustic meatus
• B. Cochlea
• C. Eustachian tube
• D. Tympanic membrane

Correct answer: D

Rationale: The correct answer is the Tympanic membrane. The tympanic membrane, also known as the eardrum, is located at the end of the ear canal and vibrates when sound waves strike it. This vibration is then transmitted to the ossicles in the middle ear, which amplify and transmit the sound to the inner ear. Choice A, the Acoustic meatus, is incorrect as it is the ear canal itself, not the structure that vibrates. Choice B, the Cochlea, is responsible for translating sound vibrations into electrical signals but is not located at the end of the ear canal. Choice C, the Eustachian tube, is responsible for equalizing pressure between the middle ear and the atmosphere and is not involved in vibration from sound waves.

3. When does cell death first occur?

• A. At age 60.
• B. At age 50.
• C. At puberty.
• D. In the fetus.

Correct answer: D

Rationale: Cell death, also known as apoptosis, first occurs during fetal development when specific cells are programmed to die. This process is essential for shaping and organizing tissues and organs. Choices A, B, and C are incorrect because cell death begins much earlier, during fetal development, rather than later in life or at puberty. Understanding the timing of cell death in different stages of life is crucial in developmental biology.

4. A parietal layer of a serous membrane lines cavities, whereas a visceral layer of a serous membrane covers organs.

• A. covers organs; lines cavities
• B. lines cavities; covers organs
• C. secretes serous fluid; secretes mucus
• D. secretes mucus; secretes a serous fluid

Correct answer: B

Rationale: In serous membranes, the parietal layer lines the cavities, providing support and protection, while the visceral layer covers the organs, reducing friction and allowing them to move freely. Therefore, the correct answer is 'lines cavities; covers organs.' Choices C and D are incorrect because serous membranes do not secrete mucus; instead, they secrete a watery serous fluid. Choice A is incorrect as it reverses the functions of the parietal and visceral layers in relation to organs and cavities.

5. Paired organs, such as the kidneys or lungs, are said to be

• A. bisexual.
• B. bilingual.
• C. bilateral.
• D. bivalent.

Correct answer: C

Rationale: The correct answer is C: 'bilateral.' Paired organs like the kidneys or lungs are described as bilateral because they occur in pairs on both sides of the body. Option A 'bisexual' refers to having both male and female reproductive organs, which is not the correct term for paired organs. Option B 'bilingual' refers to being able to speak two languages, which is not related to the description of paired organs. Option D 'bivalent' means having two valences, which is also unrelated to the context of paired organs.

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