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General Microbiology
The primary reservoir for S. typhi is Human carriers: Typhoid fever is primarily a human disease with human carriers serving as the main reservoir for the bacterium. While the bacteria can also be found in water and food, it is typically humans who c
Physiology
The sympathetic nervous system primarily uses norepinephrine (also known as noradrenaline) as its neurotransmitter. It is released from the synaptic terminals of postganglionic sympathetic fibers and acts on adrenergic receptors, which are found o
Physiology
The ileum is the primary site of vitamin B12 absorption, facilitated by intrinsic factor binding to specific receptors.