What property makes the normal pacemaker region of the heart function as a pacemaker?
The property of the normal pacemaker region is able to provide a normal setting for the heart to beat. It allows the heart to beat at a regular rate.
The answer is: D. None of the choices are correct
In order to have type ab blood, you need to have genotype blood type A and genotype blood type B.
You could receive it from these scenarios:
- Both of your parents are type ab blood
or
- One of your parents has type a blood while the other has type b blood
