Answer:
Wind shaping rocks is an example.
Explanation:
Abiotic factors are factors that aren't from a living creature. Wind picks up sharp grains that carve rocks over millions of years. Other examples include:
Water shaping rocks
Earthquakes creating riverbeds.
And much more!
Hope this helps!
Answer:
The binding of acetylcholine to its receptor activates the muscle and causes a muscle contraction. In myasthenia gravis, antibodies (immune proteins produced by the body's immune system) block, alter, or destroy the receptors for acetylcholine at the neuromuscular junction, which prevents the muscle from contracting
The answer is excretory system
According to the definition of the periosteum,
The periosteum is a membrane that covers the outer surface of all bones, except at the joints of long bones.
