Nokea
What cavity of the heart normally has the thickest wall?
- A. Left atrium.
- B. Right atrium.
- C. Left ventricle.
- D. Right ventricle.
Correct Answer: C
Rationale:
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Which structure is located on the sternum?
- A. Xiphoid process
- B. Sesamoid bone
- C. Hyoid bone
- D. Ossified process
Correct Answer: A
Rationale: The xiphoid process is the structure located at the bottom of the sternum. It is a small cartilaginous process that ossifies with age. The sesamoid bone is a small bone embedded within a tendon, not typically found on the sternum. The hyoid bone is a U-shaped bone located in the neck, not on the sternum. 'Ossified' refers to a structure that has become hardened like bone, but it is not a specific structure located on the sternum.
Why are skeletal muscles also called voluntary muscles?
- A. They are under conscious control.
- B. They are attached to the skeleton.
- C. They use ATP to energize contraction.
- D. They are striated in appearance.
Correct Answer: A
Rationale: Skeletal muscles are referred to as voluntary muscles because they are under conscious control. This means that individuals can decide when to contract these muscles, enabling voluntary movements such as walking, running, and lifting objects. Choice A is the correct answer as it reflects the defining characteristic of voluntary control over skeletal muscles. Choices B, C, and D are not the primary reasons for why skeletal muscles are termed voluntary muscles as they do not relate directly to the conscious control aspect.
Where would the urinary bladder and internal reproductive organs be found?
- A. Thoracic cavity
- B. Mediastinum
- C. Abdominal cavity
- D. Pelvic cavity
Correct Answer: D
Rationale: The urinary bladder and internal reproductive organs are located in the pelvic cavity. The pelvic cavity is the region of the body that houses these structures, providing protection and support for their functions. The thoracic cavity contains organs such as the heart and lungs, the mediastinum is the area between the lungs that contains the heart, major blood vessels, and other structures, while the abdominal cavity houses organs like the stomach, liver, and intestines.
A man has a growth on his skin and a small sample needs to be removed and observed under a microscope. Which procedure will be used?
- A. Debridement
- B. Autopsy.
- C. Biopsy.
- D. Pap smear
Correct Answer: C
Rationale:
Which structure is part of both the male reproductive system and urinary system?
- A. Epididymis
- B. Ureter
- C. Testis
- D. Urethra
Correct Answer: D
Rationale: The correct answer is D, Urethra. The urethra is a structure shared by both the male reproductive and urinary systems. It serves as a passage for urine to exit the body and for semen during ejaculation. The Epididymis, Testis, and Ureter are not structures that are part of both systems. The Epididymis is involved in sperm maturation, the Testis is responsible for sperm production, and the Ureter transports urine from the kidneys to the bladder.