Nervous System

Neuropeptide involved in vasoconstriction and increasing water permeability

Neurons that transmit impulses within the CNS and account for 99% of body neurons

Rare neurons with two processes found in special sense organs like the retina

Current is proportional to voltage and inversely proportional to resistance

Gaps in the myelin sheath that facilitate rapid impulse transmission

Neuropeptides that block pain perception and decrease stress effects

Amino acid neurotransmitter that enhances signal transmission and aids learning

Biogenic amine involved in motivation, reward, and behavioral reinforcement

Neurotransmitter involved in skeletal muscle contraction and sustaining attention

A local hyperpolarization that moves the membrane potential further from threshold

A local depolarization that brings the membrane potential closer to threshold

Approximately -70 mV, maintained by passive diffusion and the sodium-potassium pump

The propagation of action potentials along myelinated axons by jumping between nodes of Ranvier

Have a single process extending from the cell body that forms central and peripheral branches

Possess three or more processes and are the most common type in the CNS

Form myelin sheaths in the PNS and exhibit phagocytic activity

Line CNS cavities and circulate cerebrospinal fluid with cilia

Act as macrophages to engulf microbes and dead neural tissue

Connect neurons to blood supply and regulate the chemical environment

Gaps in the myelin sheath that aid in impulse transmission

Involved in social bonding, sexual arousal, and birth

Enhances signal transmission and involved in learning and memory

Involved in motivation, reward, and behavioral reinforcement

Hyperpolarizes the postsynaptic membrane away from threshold

Depolarizes the postsynaptic membrane toward threshold

Propagation of an action potential along myelinated fibers

Neurons with one process that splits into central and peripheral branches

Rare neurons found in special sense organs like the retina

Most common type of neuron and the major type in the CNS

Transmit graded potentials away from the cell body to the terminal

Receive chemical signals and conduct graded potentials

Line CNS cavities and use cilia to circulate cerebrospinal fluid

Act as macrophages to engulf microbes and dead neural tissue

Connect neurons to blood supply and regulate the chemical environment

Neuropeptide that inhibits growth hormone and slows digestion

Amino acid neurotransmitter involved in learning and memory

Biogenic amine involved in mood, sleep, and appetite

Involuntary division conducting impulses to cardiac muscle, smooth muscle, and glands

Voluntary division conducting impulses to skeletal muscles

Conducts impulses from the CNS to effectors like muscles and glands

Conducts impulses from sensory receptors to the CNS

Gaps in the myelin sheath that facilitate signal transmission

Current is proportional to voltage and inversely proportional to resistance

Neuropeptide involved in vasoconstriction and water permeability

Neuropeptides that block neurotransmitters involved in pain perception

Amino acid neurotransmitter involved in regulating ion channels

Biogenic amine involved in motivation, reward, and addiction

Neurotransmitter involved in skeletal muscle contraction and sustaining attention

Hyperpolarize the postsynaptic membrane to move it further from threshold

Depolarize the postsynaptic membrane to bring it closer to threshold

Approximately -70 millivolts maintained by passive diffusion and the sodium-potassium pump

Propagation of an action potential by jumping between Nodes of Ranvier

Possess one process extending from the cell body that forms central and peripheral branches

Rare neurons with two processes found in special sense organs

Possess three or more processes and are the most common type in the CNS

Form myelin sheaths in the PNS and exhibit phagocytic activity

Line central cavities of the brain and spinal cord and circulate cerebrospinal fluid

Act as macrophages to engulf microbes and dead neural tissue

Connect neurons to blood supply and regulate the chemical environment

Hyperpolarize the postsynaptic membrane, moving it further from threshold

Transmit impulses within the CNS and are mostly multipolar

Rare neurons found in special sense organs like the retina

Surround nerve cell bodies in the PNS and aid in controlling the chemical environment

Involved in motivation, reward, and behavioral reinforcement

Line central cavities of the brain and circulate cerebrospinal fluid

Gaps in the myelin sheath that facilitate saltatory conduction

Enhances signal transmission and is involved in learning and memory

Have one process extending from the cell body that forms central and peripheral processes

Form myelin sheaths and provide phagocytic support in the PNS

Depolarize the postsynaptic membrane, bringing it closer to threshold

The most common structural type of neuron, found primarily in the CNS

Act as macrophages to engulf microbes and dead neural tissue in the CNS

The jumping of action potentials between Nodes of Ranvier in myelinated fibers

Connect neurons to blood supply and regulate the chemical environment

Clusters of neuron cell bodies located in the peripheral nervous system

Nervous tissue composed of unmyelinated processes and cell bodies

Gaps in the myelin sheath that aid in the transmission of nerve impulses

Active channels that respond to the binding of neurotransmitters

Active channels that open or close in response to changes in membrane potential

The principle stating that current is equal to voltage divided by resistance

The electrical potential difference of approximately -70mV across a neuron's membrane at rest

A neuropeptide hormone involved in vasoconstriction and water permeability

A neuropeptide hormone involved in social bonding, sexual arousal, and birth

Neuropeptides that block pain perception and decrease the negative effects of stress

An amino acid that enhances signal transmission and is involved in learning and memory

An amino acid neurotransmitter involved in the regulation of ion channels like K, Cl, and Ca

A biogenic amine that regulates mood, appetite, sleep, and gastrointestinal motility

A biogenic amine involved in concentration and decision-making processes

A biogenic amine involved in motivation, reward, and behavioral reinforcement

A neurotransmitter involved in skeletal muscle contraction and sustaining attention

A local hyperpolarization that moves the membrane potential further from the threshold

A local depolarization that brings the membrane potential closer to the threshold

Propagation of an action potential via step-by-step depolarization of adjacent membrane areas

The propagation of action potentials along myelinated fibers by jumping from node to node

Have two processes extending from opposite sides and are found in special sense organs

Possess three or more processes and are the most common type of neuron in the CNS

Surround nerve cell bodies in the peripheral nervous system and control the chemical environment

Form myelin sheaths and perform phagocytosis in the peripheral nervous system

Line the central cavities of the brain and spinal cord and circulate cerebrospinal fluid

Act as macrophages that engulf microbes and dead neural tissue

Form myelin sheaths around nerve fibers in the central nervous system

Support neurons and regulate the chemical environment by buffering potassium ions