Answer to Question 1
Answer: In the 1930s, Hans Selye, a young Hungarian-born endocrinologist, was immersed in a study of hormones at McGill University in Montreal. Selye injected lab rats with a variety of hormones and observed their responses. He found that regardless of which hormone he used, the rats all seemed to demonstrate the same basic physical reactions each time. Selye decided to find out why, using the simplest and cheapest method he could find. He set the hormones aside, and looked for a different external pressure to apply to the rats. He found inspiration in the frigid weather outside the walls of his laboratory. He placed a group of rats in a box and left them outside on his windowsill overnight. The unhappy rats, the next morning, reflected the influence of external pressures (stress) on their physiology.
Answer to Question 2
Answer: Answers will vary, but could include:
Take a workshop or class to improve your skills (study skills, test-taking skills, time management, etc.).
Keep a planner and break down large projects into smaller tasks.
Do what you like least, first.
Leave time in your schedule for unforeseen events and reward yourself periodically.
Control of Secretion of Stress Hormones
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For the circuit in Figure 1, assume ideal diodes. The peak inverse voltage is approximately
Heat and Cold Stress Compared
Oxidative stress can begin in childhood and lead to progressive damage throughout life