Question 1
What factors can influence the functioning of your immune system?
◦ age, genetics, and nutrition
◦ caffeine use, exercise, and genetics
◦ age, alcohol intake, and exercise
◦ genetics, obesity, and quality of sleep
Question 2
What is the function of the natural killer (NK) cells?
◦ They attack foreign invaders indirectly by creating antibodies.
◦ They patrol the body looking for diseased cells and attack them with lethal chemicals.
◦ They release antigens to help increase the number of white blood cells.
◦ They attack antigens indirectly by releasing deadly chemicals into the invading cells.