Nervous System: A complex network of neurons and supporting cells that transmits signals throughout the body, coordinating actions and sensory information.
Central Nervous System (CNS): Comprises the brain and spinal cord; responsible for processing and integrating information.
Peripheral Nervous System (PNS): Consists of all nerves outside the CNS; connects the CNS to limbs, organs, and tissues, facilitating communication.
Neurons: Specialized nerve cells that transmit electrical and chemical signals; the fundamental units of the nervous system.
Glial Cells: Supportive cells in the nervous system that provide insulation (myelin), nutrients, and structural support to neurons.
Myelin Sheath: A fatty layer surrounding axons of many neurons, increasing the speed of electrical signal transmission.
1. What does the structure of the nervous system primarily consist of?
2. Which glial cells are responsible for forming the myelin sheath in the central nervous system and peripheral nervous system, respectively?
3. What is the primary role of risk factors such as hypertension and atrial fibrillation in the context of stroke types?
Nervous System — components?
CNS and PNS, with neurons and glial cells.
Neurons — role?
Transmit electrical and chemical signals.
Stroke — main types?
Ischemic and hemorrhagic strokes.
Nervous System — main components?
CNS and PNS
Neuron — role?
Transmits electrical and chemical signals
Myelin Sheath — function?
Increases speed of signal transmission
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