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Nervous system :)

Allison Carrigan

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Across
2.carry nerve impulses from receptors or sense organs towards the central nervous system.
3.a molecule on the surface or within a cell that recognizes and binds with specific molecules, producing a specific effect in the cell; e.g., the cell-surface receptors for antigens or cytoplasmic receptors for steroid hormones.
4.are endogenous chemicals that transmit signals from a neuron to a target cell across a synapse.
7.one of the threadlike extensions of the cytoplasm of a neuron; dendrites branch into treelike processes and compose most of the receptive surface of a neuron
9.an organ that produces an effect in response to nerve stimulation
11.integrates the information that it receives from, and coordinates the activity of, all parts of the body
16.is a biological tissue mass, most commonly a mass of nerve cell bodies.
21.an electrically excitable cell that processes and transmits information by electrical and chemical signaling.
23.is the part of the peripheral nervous system that acts as a control system functioning largely below the level of consciousness, and controls visceral functions.[
24.are non-neuronal cells that maintain homeostasis, form myelin, and provide support and protection for the brain's neurons.
25.is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory.
26.is a structure that permits a neuron to pass an electrical or chemical signal to another cell (neural or otherwise)
27.an enclosed, cable-like bundle of peripheral axons (the long, slender projections of neurons).
Down
1.consists of the nerves and ganglia outside of the brain and spinal cord.[1] The main function of the PNS is to connect the central nervous system (CNS) to the limbs and organs.
5.carry nerve impulses away from the central nervous system to effectors such as muscles or glands (and also the ciliated cells of the inner ear).
6.controls all voluntary muscular systems within the body, with the exception of reflex arcs
8.are a type of glial cell that are the resident macrophages of the brain and spinal cord, and thus act as the first and main form of active immune defense in the central nervous system (CNS).
10.the work per unit charge necessary to move a charged body in an electric field from a reference point to another point, measured in volts.
12.is the membrane potential to which a membrane must be depolarized to initiate an action potential.
13.are characteristic star-shaped glial cells in the brain and spinal cord.
14.a type of neuroglial cell with dendritic projections that coil around axons of neural cells. The projections continue as myelin sheaths over the axons.
15.a set or series of interconnected or interdependent parts or entities (objects, organs, or organisms) that act together in a common purpose or produce results impossible by action of one alone.
17.that process of a neuron by which impulses travel away from the cell body; at the terminal arborization of the axon, the impulses are transmitted to other nerve cells or to effector organs. Larger axons are covered by a myelin sheath.ax´onal
18.is to allow impulses to transmit quickly and efficiently along the nerve cells.
19.is the bulbous end of a neuron, containing the cell nucleus.
20.is the thin epithelial membrane lining the ventricular system of the brain and the spinal cord.
22.or neurolemmocytes are the principal glia of the peripheral nervous system (PNS).

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