NERVOUS SYSTEM (Brain is divided into 4 lobes (Parietal, Frontal,…
Brain is divided into 4 lobes
Types of neurons: unipolar, bipolar, pseudounipolar & multipolar.
Sensory: detect stimuli.
Interneurons: bonds the sensory and motor activity.
Motor: gives electric impulses to give orders to the tissue.
Neurons and glia are the cells that conform the nervous system.
Neurons: electric impulses.
Glia: nourish and protect neurons.
Synapse: signals between neurons. (axon -dendrite)
Chemical: no physical contact.
Electrical: physical contact.
Some hormones help the brain make an electrical synapse.
Brain and spinal cord.
Involuntary and voluntary acts
Reflex: Involuntary movement.
Sensory and motor neurons are involved
Voluntary act: Voluntary movement.
Sensory, interneurons and motor neurons are involved.
Gray matter: dendrites
White matter: axons