Answer:
presence of receptors in the target cells
Explanation:
A target organ responds to a particular hormone because it bears cells which have receptors for that specific hormone, meaning that a particular cell in a target organ is a target cell for a hormone if it contains functional receptors for that hormone, and cells that do not possess such a receptor cannot be influenced directly by that hormone ie may not be affected by the hormone.
I believe the answer would be easy. I think
The Vertebrae protect the spinal cord
Technically, all of these can cause double vision and other vision problems.
I'm not really sure what "less responsive" indicates, because it can mean a broad spectrum of symptoms. However, I would answer this with alcohol because it causes your eye muscles to weaken and can include symptoms like involuntary twitching.
Sorry I couldn't provide you with a definite answer, but I hope I was able to help :)
Age,height,health issues,family history are all factors (there are more) that play a role into how much you should weigh
