Examlex
Racial classifications are __________ categories.
Sympathetic Neuron
A neuron that is part of the sympathetic nervous system, which is responsible for the body's 'fight or flight' response by regulating heart rate, blood pressure, and digestive functions.
Norepinephrine
A neurotransmitter and hormone involved in stress responses, increasing heart rate, blood pressure, and sugar levels in the blood.
Adenylyl Cyclase
An enzyme that converts ATP to cyclic AMP (cAMP) in signal transduction pathways, playing a crucial role in cellular responses to hormones and other signals.
Superior Vena Cava
In humans, a very large vein that delivers blood from the upper part of the body to the right atrium. Compare with inferior vena cava.
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