In the lecture on the endocrine system, you were to view a short clip on YouTube as provided. One of the hormones it mentions is insulin and how it acts. Describe this activity.
2. Explain how the hypothalamus of the brain controls the endocrine system.
3. On a camping trip, Starr Gazer was admiring all the stars that could be seen in the night sky. She noticed a little cluster of dim stars that the edge of her vision. When she looked directly at that part of the sky, however, she could not see the cluster. When she looked toward the stars but not directly at them, she could see them. Explain what was happening. Involved in this is the fovea and its cells.
4. What are the major functional differences between the endocrine and the nervous system?
5. Explain how calcitonin, parathyroid hormone, and vitamin D are involved in maintaining blood calcium levels. What happens when too little or too much parathyroid hormone is secreted?