Parts of the Nervous System + Human Genetics

3.1 & 3.3

Nervous system Subdivisions

Central Nervous System (CNS) & Peripheral Nervous system (PNS)

Contents of CNS

Brain & Spinal Cord

Contents of PNS

Connects CNS to rest of the bodies functions, Autonomic & Somatic.

What are Nerves?

Bundles of axons

Autonomic NS subdivisions

Sympathetic (fight or flight) & Parasympathetic (returns to calm)

efferent fibers

“moving away from” - Motor neurons

afferent fibers

“Moving toward” - Sensory Neurons

Range of reaction

our genes give us boundaries of bodily operation, & our environment interacts w/ the genes to determine where in those boundaries we fall.

Genetic Environmental correlation

our genes influence our environment, & our environment influences the expression of our genes.

Epigenetics

study of how the same genotype can be expressed in different ways, or different phenotypes.

Sympathetic & Parasympathetic work together to achieve…

Homeostasis