Nokea
Rhabdomyosarcoma is the malignant tumor of the
- A. Smooth muscle
- B. Cardiac
- C. Visceral muscle
- D. Striated muscle
Correct Answer: D
Rationale: Rhabdomyosarcoma is a malignant tumor arising from striated muscle cells, hence the correct answer is D. Striated muscle cells are also known as skeletal muscle cells, which are voluntary muscles responsible for movement. Smooth muscle (Choice A) and visceral muscle (Choice C) are types of involuntary muscles found in internal organs, while cardiac muscle (Choice B) is the muscle specific to the heart. Therefore, choices A, B, and C are incorrect for this question.
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You are working in the PACU caring for a 32-year-old client who has just arrived after having a dilation and curettage (D&C) to evaluate infertility. Which assessment data are of most concern?
- A. Blood pressure 162/90.
- B. Perineal pad saturated after first 30 minutes.
- C. O2 saturation 91%-95%.
- D. Sharp, continuous, level 8/10 abdominal pain.
Correct Answer: B
Rationale: Heavy bleeding could indicate hemorrhage, necessitating immediate intervention.
Elbow, knee are _____ type of joints
- A. Ball-an
- B. socket
- C. Hinge
- D. Pivot
Correct Answer: C
Rationale: The correct answer is C: Hinge. Elbow and knee joints are classified as hinge joints because they primarily allow movement in one plane, similar to a door hinge. These joints enable flexion and extension movements, which are characteristic of hinge joints. The other choices (A: Ball-and-socket, B: Socket, D: Pivot) do not accurately describe the structure and function of the elbow and knee joints. Ball-and-socket joints allow for a wider range of motion in multiple directions, sockets are components of ball-and-socket joints, and pivot joints allow rotational movement around a central axis, none of which align with the movement pattern of the elbow and knee joints. Therefore, the correct classification for elbow and knee joints is hinge joints due to their specific range of motion.
Which bone forms the forehead?
- A. Frontal
- B. Parietal
- C. Temporal
- D. Occipital
Correct Answer: A
Rationale: The correct answer is A: Frontal bone. The frontal bone forms the forehead as it comprises the upper part of the eye sockets and the frontal part of the skull. It also houses the frontal sinuses. The parietal bone (B) forms the top and sides of the skull. The temporal bone (C) forms the sides and base of the skull, housing the ear structures. The occipital bone (D) forms the back and base of the skull, containing the foramen magnum. Therefore, the frontal bone is the only choice that directly contributes to the structure of the forehead.
The helmet-like region of the sperm that is similar to a large lysosome and assists penetration of the egg is called the ________.
- A. flagellum
- B. midpiece
- C. spermatid
- D. acrosome
Correct Answer: D
Rationale: The correct answer is D: acrosome. The acrosome is a specialized organelle in the sperm head that contains enzymes necessary for penetrating the egg during fertilization. It releases these enzymes to help the sperm penetrate the egg's protective outer layer. The flagellum (choice A) is the tail of the sperm that provides motility. The midpiece (choice B) contains mitochondria for energy production. Spermatid (choice C) is an immature sperm cell formed during spermatogenesis.
With respect to the effects of testosterone in the male which statement is incorrect?
- A. testosterone inhibits the secretion of luteinising hormone
- B. testosterone stimulates the secretion of inhibin from leydig cells
- C. testosterone induces and maintains male sexual functions
- D. testosterone stimulates protein anabolism and bone growth.
Correct Answer: B
Rationale: The correct answer is B because inhibin is primarily secreted by Sertoli cells in the testes, not Leydig cells. Testosterone actually stimulates the secretion of inhibin from Sertoli cells. In contrast, Leydig cells produce testosterone in response to luteinising hormone (Choice A). Testosterone does play a key role in inducing and maintaining male sexual functions (Choice C) and also stimulates protein anabolism and bone growth (Choice D). Thus, Choice B is incorrect as Leydig cells do not secrete inhibin.