Nursing Elites

1. Which property of a wave determines its pitch in sound waves?

• A. Amplitude
• B. Frequency
• C. Wavelength
• D. Speed

Correct answer: B

Rationale: The pitch of a sound wave is determined by its frequency. Frequency refers to the number of cycles of a wave that occur in a unit of time, usually measured in hertz (Hz). Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. Amplitude refers to the height of a wave and is related to the loudness of the sound. Wavelength is the distance between two consecutive points in a wave that are in phase, and speed is the rate at which a wave travels through a medium.

2. Choose the correct pronoun to complete the sentence: "Neither Michael nor Sarah ____ their homework finished yet."

• A. has
• B. have
• C. are having
• D. does have

Correct answer: B

Rationale: When referring to "neither" followed by two subjects, the verb agrees with the plural subject ("Sarah"). So, "have" is the correct answer.

3. What is the muscular sac in the female body that nourishes and protects a developing fetus?

• A. Ovary
• B. Fallopian tube
• C. Uterus
• D. Vagina

Correct answer: C

Rationale: The correct answer is C: Uterus. The uterus is a muscular sac in the female body where a fertilized egg implants and develops into a fetus during pregnancy. It provides nourishment to the developing fetus and protects it throughout gestation. The ovaries produce eggs, the fallopian tubes transport eggs from the ovaries to the uterus, and the vagina is the canal leading from the uterus to the outside of the body. Therefore, the uterus is the specific organ responsible for nourishing and protecting a developing fetus in the female body.

4. What is the difference between a ventral and dorsal root of a spinal nerve?

• A. Ventral carries motor, dorsal carries sensory information.
• B. Ventral carries sensory, dorsal carries motor information.
• C. Ventral is larger, dorsal is smaller.
• D. Ventral is located anteriorly, dorsal is posteriorly.

Correct answer: A

Rationale: The correct answer is A: 'Ventral carries motor, dorsal carries sensory information.' Ventral roots of spinal nerves contain motor fibers that carry signals from the central nervous system to muscles and glands, controlling movement and function. Dorsal roots, on the other hand, contain sensory fibers that transmit information such as touch, pain, and temperature from the peripheral nervous system to the central nervous system for processing. Understanding this distinction is crucial for comprehending how information is transmitted and processed in the nervous system.

5. When you get a goosebump, which type of muscle tissue is responsible for causing the hair follicles to stand on end?

• A. Skeletal muscle
• B. Smooth muscle
• C. Cardiac muscle
• D. None of the above

Correct answer: B

Rationale: When you get a goosebump, the type of muscle tissue responsible for causing the hair follicles to stand on end is smooth muscle. Smooth muscle is found in the skin attached to hair follicles and is controlled by the autonomic nervous system. When stimulated by factors like cold or emotional responses, the smooth muscle contracts, causing the hair to stand up and creating goosebumps. Skeletal muscle (choice A) is responsible for voluntary movements, cardiac muscle (choice C) is found in the heart and is responsible for pumping blood, and none of the above (choice D) is incorrect as smooth muscle is the correct answer in this case.

6. Homologous structures are those that:

• A. Have the same function but different origins
• B. Have different functions but the same origin
• C. Are similar in appearance and function due to shared ancestry
• D. Are identical in both appearance and function

Correct answer: C

Rationale: Rationale: - Option A is incorrect because structures with the same function but different origins are analogous structures, not homologous structures. - Option B is incorrect because structures with different functions but the same origin are also not homologous structures; they are considered to be vestigial structures. - Option D is incorrect because structures that are identical in both appearance and function are not necessarily homologous; they could be the result of convergent evolution. Homologous structures are those that share similarities in appearance and function due to being inherited from a common ancestor. These structures may have undergone modifications over time to adapt to different functions in different species, but their fundamental similarities can be traced back to a shared evolutionary history.

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