As a Platelet Plug Forms at an Injury Site, Platelets

question 37

Multiple Choice

As a platelet plug forms at an injury site, platelets become activated and their cytosol

• A) degranulates as they release chemicals such as ADP and thromboxane A₂.
• B) degranulates as they release chemicals such as fibrinogen and prothrombin.
• C) becomes granular as they take up chemicals such as ADP and thromboxane A_2.
• D) becomes granular as they take up chemicals such as fibrinogen and prothrombin.

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Definitions:

Epigenetic Marks

Chemical modifications to DNA and histone proteins that affect gene expression without altering the underlying DNA sequence.

Environment

The surroundings or conditions in which a person, animal, or plant lives or operates, including both natural and human-made factors.

Natural Selection

The mechanism through which creatures that are more suited to their surroundings are more likely to live and have a greater number of descendants.

Genome

A genome is the complete set of DNA, including all of its genes, in an organism, encapsulating the entire genetic information.