The answer is B Microscope :)
In brain chemistry, synapses are very important. Synapses have a number of different forms but have two basic varieties:. excitatory and inhibitory. Excitatory synapses make it more likely that a neuron will send its message to other neurons, whereas inhibitory synapses make it less likely that a neuron will send its message.
The statement above is TRUE.
Viral and bacteria STIs are usually acquired through sexual contact with an infected person. These infections have serious devastating effects on the affected and death usually result if the infection is not treated promptly. Some of these infections are still without drugs that can cure them, especially the viral STIS.
Ectoparasitic infections are those infections that are caused by tiny parasitic organisms. They are usually transmitted by close physical contact. The parasite usually affect skin or hair and typically cause itching. The effects of these infections are mild compare to that of viral and bacterial STIs.
