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Which structure works to prevent reflux of gastric contents by contracting and relaxing? 

Reading Comprehension

Passage:

Regular exercise helps maintain bone density and muscle strength. Weight-bearing activities such as walking

and resistance training are especially important in preventing osteoporosis as people age.

Which activity mentioned in the passage helps prevent bone loss?

Reading Comprehension

Passage:

Exercise increases heart rate and improves circulation. Over time, regular physical activity strengthens the

heart muscle and increases endurance.

Which effect of exercise is described in the passage?

Reading Comprehension

Passage:

Clear documentation in healthcare settings ensures continuity of care. Accurate records allow providers to

understand patient history and make informed decisions.

Why is documentation important according to the passage?

Which neuron carries the impulse from a receptor to the central nervous system?