the brain is especially venerable for attack by free radicals because of its high blood flow and large fat content.

How would the previous sentence be correctly capitalized?
Answer: The brain is especially venerable for attack by free radicals because of its high blood flow and large fat content.
just look at all the exciting features that await you!

How would the previous sentence be correctly capitalized?
Answer: Just look at all the exciting features that await you!
they were all filled with the holy spirit, and began to speak with other languages, as the spirit gave them the ability to speak.

How would the previous sentence be correctly capitalized?
Answer: They were all filled with the Holy Spirit, and began to speak with other languages, as the Spirit gave them the ability to speak.
we have a lot of apartments that are both affordable and of good quality.

How would the previous sentence be correctly capitalized?
Answer: We have a lot of apartments that are both affordable and of good quality.