Q: What are hollow cylinders and are the thickest of the cytoskeleton structures? Choices: - vesicles - cytoplasm - nucleotides - microtubules A:
microtubules

Q: What part of the body does emphysema affect? Choices: - bones - brain - heart - lungs A:
lungs

Q: What system in both males and females consists of structures that produce reproductive cells, or gametes, and secrete sex hormone? Choices: - circulatory system - immune system - digestion - reproductive A:
reproductive