Nervous System Lets begin TERMINOLOGY cover 203 Neuro

Nervous System Lets begin!

TERMINOLOGY (cover + 203) § Neuro§ Astro§ Micr(o)§ Uni§ Pia § -glia (glue) § Gangli§ Sens- biafef. Multi. Oligodendr(o)meningmoto-

INTRODUCTION §The nervous system consists of two sections.

INTRODUCTION § 1. Peripheral Nervous System (PNS) §All the nerves that go out into the body.

PNS

INTRODUCTION § 2. Central Nervous system (CNS) §BRAIN §SPINAL CORD

CNS

FUNCTIONS (4) § 1. Respond to external and internal environment. §(temp, acidity)

FUNCTIONS (4) § 2. Integration of sensory information. (make sense of stuff)

FUNCTIONS (4) § 3. Coordination of voluntary AND involuntary activities.

FUNCTIONS (4) § 4. Regulation of the body (homeostasis)

NERVOUS TISSUE

Nervous tissue §High energy user §Don’t really reproduce

Neuroglia or glial §NON-conducting! §Job is protect, support, and nourish neurons.

Nervous tissue §There are four types of neuroglia cells. A, B, and C are in CNS. D is found on the PNS.

Neuroglia §A. Astrocytes: §Nourish neurons §Connects neurons to capillaries (oxygen and nutrient)

Neuroglia §B. Oligodendrocytes: improve conduction for neurons. (Create myelin)

Oligodendrocytes

Neuroglia §C. Microglia: Small, phagocytes (eat particles) clean things up

Neuroglia §D. Schwann Cells: improve conduction (myelinate nerves)

Schwann Cells

Neurons

Neurons §Carry impulses to AND from the CNS.

Neurons §Use the book to learn about the three types of neurons.