Immune System

Open Ended

Why is the immune system important for animals such as dogs and cats?

Multiple Choice

Which of the following best describes a pathogen?

• A beneficial bacteria

• A disease-causing agent such as a virus or bacteria

• A type of white blood cell

• A nutrient for the immune system

Multiple Choice

Which of the following is a key difference between the innate and adaptive immune systems?

• The innate immune system has a memory, while the adaptive does not.

• The adaptive immune system attacks specific threats, while the innate is nonspecific.

• The innate immune system includes the spleen and lymph nodes, while the adaptive includes skin and fur.

• The adaptive immune system acts as the first line of defense, while the innate acts later.

Multiple Select

Select all functions that are performed by the lymph nodes.

• Filter the lymph of microorganisms

• Produce red blood cells

• Transport waste to veins

• Store iron for the body

Multiple Choice

What are the two main categories of the immune system based on how specific their functions are?

• Innate and adaptive immune systems

• Primary and secondary immune systems

• Active and passive immune systems

• Internal and external immune systems