Answer:
Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process. By doing so, they sustain life on Earth.
In the 1920s, Walter Cannon discovered that emotion-arousing incidents trigger an outpouring of stress hormones from the adrenal glands. One of the stress hormones is Cortisol. Cortisol is a steroid hormone, in the glucocorticoid class of hormones. When used as a medication, it is known as hydrocortisone. It is produced in humans by the zona fasciculata of the adrenal cortex within the adrenal gland. It is released in response to stress<span> and low blood-glucose concentration.
The missing words from your question were </span>stress hormones. I hope this is the answer that you were looking for.
Viruses make us sick by killing cells or disrupting cell function. Our bodies often respond with fever (heat inactivates many viruses), the secretion of a chemical called interferon (which blocks viruses from reproducing), or by marshaling the immune system's antibodies and other cells to target the invader.
