Where does the spindle fiber connect to the chromosome?

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Explanation:

Each half of the chromosome, the sister chromatids, has a granule located somewhere near the centromere. This is the kinetochore, and is the place where the spindle microtubules attach.

Long protein fibers called microtubules extend from the centrioles in all possible directions, forming what is called a spindle. Some of the microtubules attach the poles to the chromosomes by connecting to protein complexes called kinetochores.

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hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.