Nokea
Which portion of the sperm houses the nucleus and its DNA?
- A. Midpiece
- B. Flagellum
- C. Head
- D. Tail
Correct Answer: C
Rationale: The correct answer is C: Head. The head of the sperm contains the nucleus, which houses the DNA. The nucleus carries the genetic information required for fertilization. The midpiece contains mitochondria for energy production, the flagellum provides motility, and the tail is a part of the flagellum. Therefore, the head is the only part of the sperm that houses the nucleus and DNA, making it the correct answer.
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After a radical prostatectomy, a client is to be discharged with a retention catheter. He has prescriptions for hydrocodone/acetaminophen 5 mg/500 mg (Vicodin) and sulfamethoxazole-trimethoprim (Septra). Which nursing action included in the client discharge plan is best to delegate to an experienced LPN working with you?
- A. Reinforce the need to check his temperature daily.
- B. Demonstrate how to clean around his urinary meatus.
- C. Document a discharge assessment in the client's chart.
- D. Instruct the client about the need to use stool softeners.
Correct Answer: A
Rationale: Reinforcing health teaching is appropriate to delegate to an LPN.
Which statement is true for the reproduction of reptiles and birds?
- A. Both newly hatched birds and reptiles require parental care
- B. They are both ovoviviparous.
- C. Both exhibit external fertilization.
- D. Both can reproduce asexually.
Correct Answer: B
Rationale: The correct answer is B: They are both ovoviviparous. Reptiles and birds are ovoviviparous, meaning they lay eggs that hatch internally and give birth to live young. Reptiles and birds do not require parental care immediately after birth, so choice A is incorrect. They reproduce through internal fertilization, making choice C incorrect. Reproduction through asexual means is not common in reptiles and birds, making choice D incorrect.
Which of the following sets of tissues are all part of a developing follicle.
- A. granulosa cells, theca, corpus luteum
- B. theca, acrosome, antrum
- C. oocyte, corpus luteum, granulosa cells
- D. . zona pellucida, cumulus oophorous, theca
Correct Answer: D
Rationale: The correct answer is D because all the tissues mentioned (zona pellucida, cumulus oophorous, theca) are indeed part of a developing follicle. The zona pellucida is the glycoprotein layer surrounding the oocyte, the cumulus oophorous is a cluster of granulosa cells surrounding the oocyte, and the theca is a layer of connective tissue surrounding the follicle.
Choice A is incorrect because the corpus luteum is not part of a developing follicle. Choice B is incorrect because the acrosome is a structure in sperm, not the follicle. Choice C is incorrect because the corpus luteum is not part of a developing follicle, and the oocyte is already present within the follicle but is not considered a part of it.
Before implantation, the blastocyst obtains its nutrition from the uterine endometrial secretions. How does the blastocyst obtain nutrition during the first week after implantation?
- A. It continues to derive nutrition from endometrial secretions
- B. The cells of the blastocyst contain stored nutrients that are metabolized for nutritional support
- C. The placenta provides nutrition derived from maternal blood
- D. The trophoblast cells digest the nutrient-rich endometrial cells and then absorb their contents for use by the blastocyst
Correct Answer: D
Rationale: Step 1: The trophoblast cells of the blastocyst invade the endometrial lining during implantation.
Step 2: The trophoblast cells secrete enzymes to digest the nutrient-rich endometrial cells.
Step 3: The digested nutrients are absorbed by the trophoblast cells.
Step 4: These nutrients are then utilized by the blastocyst for its growth and development.
Step 5: This process ensures that the blastocyst receives the necessary nutrition for the first week after implantation.
Summary:
A: Incorrect. Endometrial secretions are no longer the source of nutrition after implantation.
B: Incorrect. While the blastocyst may contain some stored nutrients, they are not sufficient for the first week post-implantation.
C: Incorrect. The placenta is not fully functional until later in pregnancy, so it does not provide nutrition in the first week.
Inflammation of joints
- A. Arthritis
- B. Osteomyelitis
- C. Chondritis
- D. Chondritis
Correct Answer: A
Rationale: The correct answer is A: Arthritis. Arthritis specifically refers to inflammation of joints, making it the most appropriate choice. Osteomyelitis (B) is an infection of the bone, not joints. Chondritis (C) is inflammation of cartilage, not joints. The duplicate choice of Chondritis (D) is incorrect.