Answer:
(a) Allow movement in only one plane/direction (that is extension or flexion)
(b) The skeletal system also produces blood cells in their bone marrow
<span>Steroids are like hormones that greatly influences bodily activities mostly in growth and function. These functions may modify, change and control one’s body organs or system that’ll vary in form, shape or structure due to these hormone-like compounds and also, it can affect one’s psychological and neurological state. There are several types of steroids. Examples can include: </span><span><span>
1. </span>Sex steroids. These are can influence reproduction and sex characteristics.</span> <span><span>
2. </span>Anabolic steroids. Most abused in many athletic activities. These steroids are used for muscle and bone growth.<span>
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Pretty sure it would be A it makes the most sense
The answer is D. ...................................................
