Which of the following is NOT a function of the skeletal system?
Communication
Support
Storage of minerals
Production of blood cells
Anchorage for muscles
The Correct Answer is A
Choice A reason: Communication is not a direct function of the skeletal system. While the skeletal system supports structures involved in communication (e.g., the skull housing the brain), it does not itself facilitate communication.
Choice B reason: Support is a primary function of the skeletal system. It provides a rigid framework that supports the body and maintains its shape.
Choice C reason: The skeletal system stores essential minerals such as calcium and phosphate, which can be released into the bloodstream as needed.
Choice D reason: Hematopoiesis, or the production of blood cells, occurs in the red bone marrow found within certain bones. This is a vital function of the skeletal system.
Choice E reason: Bones serve as anchoring points for muscles, allowing movement through the leverage of joints and tendons.
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Related Questions
Correct Answer is B
Explanation
Choice A reason: Myofilaments are the smallest contractile units within myofibrils, composed of actin and myosin. They do not represent bundles of muscle fibers.
Choice B reason: Fascicle is the correct term for a bundle of muscle fibers. Each fascicle is surrounded by perimysium and contains multiple muscle cells.
Choice C reason: Myofibrils are microscopic structures within individual muscle cells that contain the contractile machinery. They are not bundles of muscle fibers.
Choice D reason: Whole muscle refers to the entire organ composed of multiple fascicles, connective tissues, blood vessels, and nerves. It is a larger structure than a bundle of muscle fibers.
Correct Answer is A
Explanation
Choice A reason: The talus is a tarsal bone in the ankle that articulates with the tibia and fibula. It is not embedded within a tendon and therefore not classified as a sesamoid bone.
Choice B reason: The radius is a long bone in the forearm and is not embedded in a tendon. It does not meet the criteria for a sesamoid bone.
Choice C reason: The femur is the longest bone in the body and is classified as a long bone. It is not a sesamoid bone.
Choice D reason: The hamate is one of the carpal bones in the wrist. It is not embedded in a tendon and is not considered a sesamoid bone.
Choice E reason: The patella is the most prominent example of a sesamoid bone. It is embedded within the quadriceps tendon and functions to protect the knee joint and enhance leverage during leg extension.
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