Examlex
When the centers of tubercles break down into _____ lesions, they gradually heal by calcification that replaces normal lung tissue.
Sex Hormones
Chemical substances produced by the body that regulate sexual development, behavior, and reproduction.
Reproduction
The biological process by which new individual organisms are produced from their parents.
Neurotransmitters
Chemicals released by neurons that transmit signals across a synapse from one neuron to another.
Behavior
The actions or reactions of an individual, usually in relation to the environment, which can be observed and measured.
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