Final answer:
The correct statement is that toxins in the blood are removed by the kidneys. Biceps and triceps are made of skeletal muscle, not smooth muscle, and bones support the body and create white blood cells. Striated muscles are generally voluntary, with cardiac muscle being an exception as it is involuntary.
Step-by-step explanation:
The student asked about the functions of muscles and other biological structures. The true statement among those provided is that toxins in the blood are removed by the kidneys. Biceps and triceps are not made of smooth muscle; they are made of skeletal muscle, which is also known as voluntary muscle because we can control its movements consciously. Bones do indeed support the body, and they also produce blood cells, including white blood cells, within their marrow. Lastly, striated muscle, which comprises skeletal muscles, is generally voluntary, while cardiac muscle is striated and involuntary, found only in the heart. Smooth muscle tissue, which is involuntary, is found in the walls of organs and plays a role in moving substances through the body, such as affecting the flow of blood and creating blood pressure.