<span>The law that prohibited the marketing of new drugs unless they were adequately tested to demonstrate safety was the </span>Federal Food, Drug, and Cosmetic Act of 1938
Sound waves are sent out buy the animal/or vessel using sonar and the animal/vessel uses the echo from the original Soundwave that was sent out to determine the distance and size of the object that it hit
Answer:
a. True
Explanation:
Exercising regularly is an important part of a healthy lifestyle. People who lead an active life are less likely to get sick and more likely to live a longer life. Exercising allows you to have a better physical condition and also improves your mental health and general feeling of well-being.
It is important that physical activity is part of the lives of children, adults and the elderly. Exercise doesn't have to be energetic: you can find ways to stay active that fit your daily routine, such as walking. If you never exercised or haven't done it in a while, it's easy to start. Physical activity is essential to maintain a healthy body weight and is even beneficial during pregnancy. However, be sure to take steps to keep yourself free of injuries and remember that nutrition and hydration also play an important role. Eating the right nutrients provides the fuel you need to exercise and drink fluids helps prevent dehydration.
Staying physically active can help prevent serious diseases. The following describes some benefits of exercising for health.
Answer:
D. Immune response
Explanation:
An immune response is defined as any reaction that occurs within a host when its body recognizes and defends itself against pathogenic microorganisms (e.g., viruses, bacteria, protists, etc) and/or chemical compounds that look to be foreign and harmful to the body. When the number of detected pathogenic microorganisms increases, the immune system in the host responds by producing cells that attack them or by producing proteins (i.e., antibodies) that destroy the harmful substances. A substance capable of triggering an immune response is known as an antigen (e.g., a structural protein of a pathogenic virus). There are two distinct types of immune responses: 1-innate immune responses, where the body mounts a response immediately without requiring a previous contact with the harmful antigen and does not retain a memory of previous responses; and 2- adaptive immune responses that only occur after exposure to an antigen, these responses are slower but they are specific and produce immunological memory.
