At what gestational age after fertilization are all major bronchi present?

The MOST serious and immediate injury that results from electrical contact is:

A) point of contact burns and exit wounds. B) disseminated intravascular coagulation. C) the development of cardiac arrhythmias. D) the internal damage to bone and muscle.

The neurotransmitter produced in the substantia nigra is:

a. Dopamine b. Acetylcholine c. Serotonin d. Glycine