Examlex
Which of the following is not found on a sperm cell?
Joints
Connections between bones that allow for movement and provide mechanical support.
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, controlling the passage of substances in and out of the cell.
Muscle Fiber
The individual contractile cells of a muscle, composed of myofibrils and capable of producing force and movement.
Agonist
A chemical substance that binds to and activates specific receptors on cells, leading to a biological response.
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