Question

2.When the aortic valve opens into the aorta, blood flows: out to the body, into the right atrium, into the left ventricle, or out of the pulmonary artery

4. How can an automatic external defibrillator (AED) save a person’s life?

5.How does high blood pressure affect the heart?:High blood pressure forces blood from the atria into the ventricles. High blood pressure forces blood from the ventricles into the atria. High blood pressure creates excessive force on the blood vessels, weakening them.High blood pressure causes the heart muscle to contract before the atria fully fill with blood.

13.How does obesity affect the joints?:Being obese provides more cushioning for the joints and protects them from harm.Being obese cuts off circulation to the joints and damages the blood vessels around them.Being obese places extra stress on the joints and makes it more likely a joint replacement will be needed.Being obese creates more metabolic wastes, which attack the cartilage between joints and make it more likely a joint replacement will be needed

15.What does the medical community recommend to prevent obesity?:Take in fewer calories than the body burns during physical activity and metabolism.Avoid anyone infected with adenovirus-36.Eat foods that are fat and gluten free.Eat a diet high in protein and carbohydrates.

16.Why haven’t scientists studied adenovirus-36 in more people?:Because it is unethical to infect healthy people with a virus.Because it is unethical to infect people with obesity with a virus.Because it is unethical to study the effects of viruses in people.Because it is unethical to apply the study of the virus in animals to people.

23.Which of the following was required before widespread organ donation could be successful?

24.What mechanism causes organ rejection in transplant patients?
25.Which of the following could eliminate the need for immunosuppressant drugs?

Answer 1

2. When the left ventricle contracts, the mitral valve closes and the aortic valve opens.

4. An AED is a portable, battery-operated device that a bystander can use. It checks the heart rhythm and can send an electric shock to the heart to try to restore a normal rhythm. AEDs are in public places like office buildings, schools, and shopping malls.

5. High blood pressure forces the heart to work harder to pump blood to the rest of the body. This causes the lower left heart chamber (left ventricle) to thicken. A thickened left ventricle increases the risk of heart attack, heart failure and sudden cardiac death

13. Having overweight or obesity may raise your risk of getting osteoarthritis by putting extra pressure on your joints and cartilage. If you have excess body fat, your blood may have higher levels of substances that cause inflammation. Inflamed joints may raise your risk for osteoarthritis.

23. A) adenovirus-36 research

B) embryonic stem cell research

C) techniques to decellularize organs

D) development of immunosupprecent drugs***

I think it is D because without immunosupprecents lots of organ transplants would be rejected by the recipients body.

24. This is because the person's immune system detects that the antigens on the cells of the organ are different or not "matched." Mismatched organs, or organs that are not matched closely enough, can trigger a blood transfusion reaction or transplant rejection.

25. mmunosuppressant drugs are used to treat autoimmune diseases. With an autoimmune disease, the immune system attacks the body's own tissue. Because immunosuppressant drugs weaken the immune system, they suppress this reaction. This helps reduce the impact of the autoimmune disease on the body.