Nokea
Which structure is found in the upper respiratory tract?
- A. Bronchi.
- B. Alveoli
- C. Pharynx.
- D. Lungs.
Correct Answer: C
Rationale:
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Which structure is located on the sternum?
- A. Xiphoid bone
- B. Sesamoid bone
- C. Hyoid bone
- D. Ossified
Correct Answer: A
Rationale: The correct answer is the Xiphoid bone. The xiphoid process is a small cartilaginous extension at the lower end of the sternum. The Sesamoid bone is a small bone embedded within a tendon, typically found in joints. The Hyoid bone is a U-shaped bone in the neck that does not articulate with any other bone. 'Ossified' means turned into bone or hardened, but it does not specifically refer to a structure located on the sternum.
What is the name of the outermost layer of the skin?
- A. dermis
- B. epidermis
- C. subcutaneous tissue
- D. hypodermis
Correct Answer: B
Rationale: The correct answer is B, 'epidermis.' The epidermis is the outermost layer of the skin, providing a protective barrier against environmental factors and regulating water loss. The dermis is located beneath the epidermis and contains important structures like blood vessels and glands. Subcutaneous tissue, also known as the hypodermis, is located below the dermis and serves functions such as insulation and energy storage.
All actions of the nervous system depend on the transmission of nerve impulses over which of the following?
- A. Neuroglia
- B. Efferent pathways
- C. Afferent pathways
- D. Neurons
Correct Answer: D
Rationale: Nerve impulses are transmitted in the nervous system through neurons. Neurons are specialized cells responsible for transmitting electrical and chemical signals, known as nerve impulses. Neuroglia are supportive cells in the nervous system, efferent pathways carry signals away from the central nervous system, and afferent pathways carry signals towards the central nervous system. Therefore, neurons play a crucial role in transmitting nerve impulses, making them the correct answer.
Which structure is a ball and socket joint?
- A. Elbow
- B. Ankle
- C. Shoulder
- D. Knee
Correct Answer: C
Rationale: The correct answer is C, Shoulder. A ball and socket joint allows for a wide range of motion in multiple directions and is characterized by a spherical end of one bone fitting into a socket on another bone. The shoulder joint is a prime example of a ball and socket joint, offering extensive movement capabilities compared to other joint types like hinge joints (e.g., elbow and knee) or gliding joints (e.g., ankle).
What is the function of the thrombocytes?
- A. Form connective tissue.
- B. Play a role in blood clotting.
- C. Defend against infection.
- D. Transport respiratory gases.
Correct Answer: B
Rationale: