Nokea
The distal end of the two bones that articulate with the carpals are broken. Which bones are these?
- A. Ulna and radius.
- B. Metacarpals and phalanx.
- C. Humerus and ulna.
- D. Humerus and radius.
Correct Answer: A
Rationale:
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Which of the following are functions of the skeletal system? (Select the ONE that does not apply.)
- A. Supporting the body
- B. Hemopoiesis
- C. Conducting impulses
- D. Providing protection
Correct Answer: C
Rationale: The correct answer is C, 'Conducting impulses.' The skeletal system's primary functions include supporting the body to maintain posture and provide structure, facilitating movement, protecting internal organs, and producing blood cells through hemopoiesis. Conducting impulses is a function of the nervous system, not the skeletal system.
Where do spermatozoa develop in men?
- A. Seminiferous tubules
- B. Vas deferens
- C. Ejaculatory ducts
- D. Bulbourethral glands
Correct Answer: A
Rationale: Spermatozoa develop within the seminiferous tubules of each testis. These tubules are responsible for the production of sperm through a process called spermatogenesis. While the vas deferens, ejaculatory ducts, and bulbourethral glands play essential roles in the transport and release of sperm, they are not involved in the actual development of sperm.
What are the functional units of the kidney?
- A. Ureters
- B. Glomeruli
- C. Nephrons
- D. Renal capsules
Correct Answer: C
Rationale: Nephrons are the functional units of the kidney responsible for filtering blood, regulating fluid balance, and forming urine. Each kidney contains thousands of nephrons that work together to maintain homeostasis in the body. Ureters are tubes that carry urine from the kidneys to the bladder, not the functional units. Glomeruli are part of the nephron structure, specifically involved in the initial filtration of blood. Renal capsules are outer coverings of the kidney and do not serve as the functional units responsible for kidney function.
What substance makes up the pads that provide support between the vertebrae?
- A. bone
- B. cartilage
- C. tendon
- D. fat
Correct Answer: B
Rationale: Cartilage is the substance that makes up the pads providing support between the vertebrae. These pads, known as intervertebral discs, consist of tough outer layers of fibrous cartilage and a gel-like inner core. Cartilage plays a crucial role in cushioning the vertebrae, absorbing shock, and maintaining flexibility in the spine.
In which cavity are the urinary bladder and internal reproductive organs found?
- A. Pelvic
- B. Abdominal
- C. Thoracic
- D. Pleural
Correct Answer: A
Rationale: The correct answer is A: Pelvic. The urinary bladder and internal reproductive organs are located in the pelvic cavity. The pelvic cavity is situated below the abdominal cavity and houses various organs, including the urinary bladder and reproductive organs. The abdominal cavity contains organs like the stomach, liver, and intestines, while the thoracic cavity houses the lungs and heart. Pleural is an incorrect choice as it is related to the lining around the lungs.