Answer: The sympathetic nervous system connects the internal organs to the brain by spinal nerves. When stimulated, these nerves prepare the organism for stress by increasing the heart rate, increasing blood flow to the muscles, and decreasing blood flow to the skin.
Explanation:
<span>There
are no choices available but I will just give you a brief description of a
person living a sedentary life. This person does not partake in any form of
physical activity or exercise, has bad habits, and an improper diet. People who
often live this kind of lifestyle are prone to many health-related diseases
(e.g. heart disease, stroke, cancer). </span>
Answer:
Gene-environment interactions.
Explanation:
In gene-environment interactions, the field of epigenetics looks beyond the genotype itself and studies how the same genotype can be expressed in different ways. Scientists studied how the same genotype can turn out to be very different phenotypes. Gene expression is most of the time influenced by the environment in ways that are not always obvious. As we see in this case, identical twins share the same genetic information, their genetic material is exactly the same, but even with identical genes, there can be an incredible amount of difference in how gene expression can turn out throughout each twin’s life, one with schizophrenia and one completely healthy mentally.
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