A few practice ?'s on my study guide that I'm stuck on.

Put these in the correct sequence for phagocytosis?
chemotaxis, adherence, ingestion, digestion, killing.

What is released by activated T cells and macrophages to mobilize immune cells and attract other leukocytes into the area?
(Have it narrowed down to either:)
a) Cytokines or b)Interleukin-2 proteins

Select the correct statement about active and passive immunity? (Have it narrowed down to 2 answers)
a) active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies.
b)the antibodies utilized in active immunity are acquired from another organism

Sure! Here's how you can approach these practice questions:

1. For the first question on the correct sequence for phagocytosis, you need to put the steps in the correct order. Phagocytosis is the process by which cells engulf and digest foreign particles. The correct sequence is:
- Chemotaxis: This is the movement of phagocytic cells towards the site of infection or injury, guided by chemical signals.
- Adherence: Phagocytic cells attach to the surface of the foreign particle.
- Ingestion: The phagocytic cell engulfs the foreign particle, enclosing it within a membrane-bound vacuole called a phagosome.
- Digestion: The phagosome fuses with lysosomes, forming a phagolysosome, where the foreign particle is broken down by enzymes.
- Killing: The digested particle is killed or neutralized by the phagocytic cell.

Place the steps in this order: Chemotaxis, adherence, ingestion, digestion, killing.

2. For the second question about the molecule released by activated T cells and macrophages, you need to identify the correct option. Cytokines are signaling molecules released by immune cells to communicate with each other. Interleukin-2 (IL-2) is a specific type of cytokine that plays a role in activating T cells. So, the correct answer is a) Cytokines.

3. The third question asks for the correct statement about active and passive immunity. Active immunity refers to protection against a specific pathogen that the body generates on its own. Passive immunity, on the other hand, is gained from receiving pre-formed antibodies from an external source. Considering this, the correct statement is a) Active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies. In active immunity, the body produces its own antibodies, while in passive immunity, antibodies are acquired from another organism.

Remember, when answering these questions, it's important to understand the concepts and reasoning behind each option to arrive at the correct answer. I hope this helps you! Let me know if you have any more questions or need further clarification.