4 major parts of the nervous system?

Answer 1

Neurons: Contain a relatively large cell body containing the nucleus, cytoplasm, and all the major organelles.
Dendrites, a cell process that conducts impulse toward the cell body. Axons, a cell process that conducts impulses away from the cell body.
Axons usually contain a series of enclosing cells called Schwann cells. Collectively these Schwann cells are called the myelin sheath. Axons may be branched and end up in structures called synaptic knobs. The gap between nerve cells is the synapse.
The cells bodies are located in the central nervous system.( brain and spinal cord). The cell bodies of certain nerves cluster outside of the spinal cord in aggregates called ganglia. These and the axons make up the peripheral nervous system. The major types of neurons of this system are: sensory and motor. They are connected to the central nervous system by structures called interneurons.
Supporting cells: these cells outnumber neurons 10-50 to one. They do not conduct impulses but are needed for the physical integrity of the system. Glial cells, Astrocytes and oligodendrocytes.

Nervous System (Parts and Brain)
A. Central Nervous System (CNS)

Brain:
1. Medulla Oblongata: through the autonomic nervous system, controls involuntary and visceral activities.
2. Cerebellum: controls body balance, muscular coordination and equilibrium.
3. Hypothalamus: regulates body temperature, thirst, hunger, metabolism, pleasure, pain, sex, and rage ( in general it maintains the internal environment).
4. Thalamus: The center that sorts out the thousands of incoming and outgoing impulses and relays them to the various brain centers.
5. Cerebral cortex: center of all voluntary muscular control and mental activity. centers of analysis, coding, storage of information, recognition, memory, understanding, intelligence and sense integration are located here.

B. The Autonomic Nervous System:
Control of the involuntary muscles is taken care of by the autonomic nervous system. It is divided into 2 separate parts: the sympathetic and the parasympathetic systems.

Answer 2

1) Central.

2) Peripheral.

Autonomic consisting of:
3) Para-sympathetic.
4) Sympathetic.

Answer 3

1. Central
2. Peripheral
3. Somatic
4. Autonomic

Answer 4

1.central nervous system: consists of the brain and the spinal cord.
2. the peripheral nervous system: consists of the:
A.somatic
B.autonomic: sympathetic (adrenergic) and parasympathetic (cholinergic)...

Answer 5

Central, peripheral,autonomous(brain,backbone,neurones,matrix)

Answer 6

peripheral, somatic, autonomic, and central .

Answer 7

cerebrum cerebellum nerves and neurons