Anaphy Lec09

Neurons/Nerve Cells

recieve stimuli, conduct action potentials and transmit sognals to other neuron or effector organs/the functional unit.

(1) Cell body (2) Dendrites (3) Axon

Nuerons or nerve cells has (3) parts what are does?

Cell body

contains a nucleus and processes stimulus/ also called as soma these are teh nucleus and organelles.

Dendrites

extensions of the neuron cell body; receive stimulus from other neurons or sensory receptors/recieve impulses.

Axon

single long process; transmits stimulus to a gland, muscle, organ, or other neuron/carries impulses away.

Glial Cells/Neuroglia

supportive cells of CNS and PNS

Myelin Sheaths

fatty, protective wrapping around axons of some neurons that are formed by oligodendrocytes (CNS) nx Schwann cells (PNS)/speeds transmission

(1) Sensory (Afferent) (2) Motor (Efferent) (3) Interneurons

What are the (3) types of Neurons?

Sensory (Afferent)

send impulsesbto CNS.

Motor (Efferent)

sends impulses from CNS to effectors

Interneurons

connect neurons with CNS.

Synapse

a junction where the axon of one neuron interacts with another neuron and involved the release of neutransmitter.

Brainstem

connects the spinal cord to the remainder of brain.

Cerebellum

attached ro brainstem by several large connections called cerebellar peduncles; known as “little brain”

Diencephalon

This is the part of brainstem and crrebrum consisting of thalamus, hypothalamus, and epithalamus.

Thalamus

the message station in diencephalon a size of small egg/influence moods and detects pain/send messages in the brain

Hypothalamus

In diencephalon this is the body boss/mainting homeostasis, hunger or temperature

Epithalamus

In diencephalon this is the Sleep helper/emotional & visceral response to odors

Cerebrum

largest part of the brain which is divided into right and left hemisphere by longitudinal fissure.