L13 Bio Homework

What is the primary function of the immune system?

• Regulating body temperature

• Producing hormones for growth

• Defending the body against infection, illness, and disease

• Filtering waste products from the blood

Where do defensive white blood cells, also known as leukocytes, originate?

• The heart

• The brain

• The bone marrow

• The lungs

What is the primary method by which phagocytes destroy foreign cells?

• By releasing antibodies to neutralize them

• By consuming them

• By increasing body temperature

• By forming a protective barrier around them

How do antibodies specifically target and destroy invading cells?

• They increase the body's overall temperature

• They latch onto unique antigens like a lock and key

• They physically push foreign cells out of the body

• They create a protective shield around healthy cells