Answer to Question 1
Early onset of Alzheimer's disease tends to run in families. It has an autosomal dominant inheritance in that the presence of certain genes means that there is a 100 chance of the person eventually getting the disease. Later onset Alzheimer's disease may be linked to risk genes, which are genes that increase one's risk of getting the disease. There are likely other genetic or environmental triggers of Alzheimer's disease that are yet to be discovered. The key symptoms of Alzheimer's disease include gradual declines in memory, learning, attention, and judgment; confusion as to time and place; difficulties in communicating and finding the right words; decline in personal hygiene and self-care skills; inappropriate social behavior; and changes in personality. In its advanced stages, Alzheimer's disease often causes incontinence, the loss of control of bladder or bowels. Currently there is no effective treatment for Alzheimer's disease and no way to prevent it. However, the symptoms can be alleviated. Spaced retrieval teaches individuals with Alzheimer's disease to remember new information gradually increasing the time between retrieval attempts. Interventions for individuals with Alzheimer's disease should be developed to help the person cope as well as possible with the symptoms.
Answer to Question 2
b
The black-legged tick transmits Lyme disease
Tracing the Source of a Water-Borne Disease
Positive and Negative Symptoms of Schizophrenia
Symptoms and Signs Associated with Damage to Nerves in Different Areas of the Spinal Column
Celiac disease affects the small intestine.
A sampling of bacterial diversity. Most bacteria do not cause disease.