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Instructions: this is an honors level course. Answer all questions fully using complete sentences. If you want full credit, please provide plenty of detail.

1. How is the concept of homeostasis related to aging and disease? Provide examples to support your thinking. The older people get the less they are able to control their systems, such as their urinary system. When this happens they are more prone to diseases. 2. When we are dehydrated, we are thirsty and drink water. Is this the part of negative or positive feedback control systems? Explain your reasoning. This is negative feedback because when you are thirsty that results in low blood pressure. Once you drink something it restores the body to normal blood pressure, and balances out homeostasis. 3. Why would you have a hard time understanding physiology if you did not also understand anatomy? If you do not understand the parts of the body then you will not be able to understand how they function. You must first understand anatomy to understand physiology, they depend on each other. 4. Describe the different body cavities.

Cranial cavity- cerebrum, cerebellum, pituitary, occipital, thalamus, hypothalamus, portions of the brain. Pelvic cavity   - urinary bladder, ureters, urethra
Spinal cavity – spinal cord, vertebrae
5. Career Focus: what does a dental hygienist do and why would he/she need to know anatomy and physiology? They need to know so that they can decide where the problem for the patient is. Also so they can fix the problem and maybe even understand why the patients’ body may be reacting to a certain type of treatment.
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