Overview

The PNS consists of all nerves found outside of the __.

Brain and spinal cord.

The sensory division is afferent and sends impulses from the senses to the __.

CNS (Central Nervous System).

The sympathetic division is used in __ situations.

Emergency.

The parasympathetic division reduces the sympathetic response and provides a __ function.

Resting.

The motor division is efferent and sends impulses from the CNS to the __.

Muscles and glands.

The nervous system is the master control system and works with the __ system.

Endocrine.

Sensory input involves detecting stimuli and the body.

Inside; outside.

Integration in the nervous system is the process of __ and interpreting information.

Processing.

The response of the nervous system involves activation of or .

Muscles; glands.

Neurons conduct impulses around the body and account for __% of major nerve cells.

10.

Neuroglia is often termed as '__' because it supports, insulates, and protects neurons.

Nerve glue.

The main part of a neuron is the cell body, which contains the __, cytoplasm, and organelles.

Nucleus.

Dendrites bring impulses __ the cell body.

Toward.

An axon sends impulses __ from the cell body.

Away.

Axons end in __ terminals which release neurotransmitters.

Axon.

Neurons can be classified by the number of __ extending from the cell body.

Processes.

Afferent neurons carry impulses __ the CNS.

Toward.

Efferent neurons carry impulses __ the CNS.

Away from.

Interneurons connect and neurons.

Afferent; efferent.

Axons are wrapped in __ which functions as insulation.

Myelin.

Schwann cells, a type of neuroglia, wrap around the axon to form __.

Myelin.

The outer layer of the Schwann cell is called the __.

Neurilemma.

Myelin helps nerve impulses travel more __.

Quickly.

Myelin wrappings are called the __ sheath.

Myelin.

The gaps in the myelin sheath formed by Schwann cells are called __ of Ranvier.

Nodes.

Astrocytes in the CNS support neurons to __.

Capillaries.

Microglia provide __ response to the CNS.

Immune.

Ependymal cells secrete and circulate __.

CSF (Cerebrospinal Fluid).

Oligodendrocytes provide __ insulation to neurons.

Myelin.

Satellite cells support and anchor __ in the PNS.

Neurons.

Schwann cells provide myelin __ in the PNS.

Insulation.

Integration in the nervous system is crucial for processing sensory __.

Information.

The role of the nociceptors in the sensory division is to detect __.

Pain.

The __ division of the nervous system is responsible for voluntary control of body movements.

Somatic.

The __ division is involved in involuntary body functions.

Autonomic.

The spinal cord is a major pathway for __ impulses traveling to and from the brain.

Nerve.

The two main types of cells in the nervous system are neurons and __.

Neuroglia.

Neurons transmit __ between different parts of the body.

Signals.

The central nervous system (CNS) consists of the __ and spinal cord.

Brain.

A primary function of neuroglia is to support and maintain __ environment for neurons.

Homeostatic.

Motor neurons carry signals to __ to initiate movement.

Muscles.

Sensory neurons carry signals from __ to the CNS.

Sensory receptors.

Autonomic functions are managed by the __ system.

Autonomic nervous.

Neurons with many processes are termed __ neurons.

Multipolar.

Neurons that primarily send signals to other neurons are known as __ neurons.

Interneurons.

The __ neuron type is responsible for transmitting sensory information from the body to the CNS.

Afferent.

The main role of the myelin sheath is to increase the speed of __ conduction.

Nerve.

Astrocytes play a role in the blood-brain __.

Barrier.

The primary function of microglia is to serve as the immune defense in the __.

CNS.

Ependymal cells help to circulate __ within the CNS.

Cerebrospinal fluid (CSF).

Schwann cells are essential for the regeneration of __ in the PNS.

Nerve fibers.

Myelin is primarily composed of __ and lipids.

Proteins.

The process of __ allows the nervous system to react quickly to changes in the environment.

Reflex.

Neuroglia support neurons by providing __ and insulation.

Nutrients.

Neurons communicate with one another at __ junctions.

Synaptic.

The resting potential of a neuron is maintained by sodium-potassium __.

Pump.

Neurons transmit action potentials through __ changes across the membrane.

Voltage.

The __ is the part of the neuron that receives signals from other neurons.

Dendrite.

The main cell body of a neuron is also known as the __.

Soma.

Neurotransmitter release occurs at the __ terminals.

Axon.

The gap between two neurons is called the __.

Synapse.

Imbalances in neurotransmitter levels can lead to __ disorders.

Neurological.

The CNS is protected by the __ system.

Skull and spine.

Glial cells outnumber neurons in the CNS by a ratio of approximately __ to 1.

10.

Schwann cells are vital for the __ of peripheral nerves after injury.

Regeneration.

The flow of information through a neuron is generally from __ to axon terminals.

Dendrites.

The peripheral nervous system connects the CNS to the __.

Rest of the body.

The basic functional unit of the nervous system is the __.

Neuron.

The cell body of a neuron contains __ and genetic material.

Organelles.

Neurons transmit __ through electrical signals and chemical synapses.

Information.

The brain is part of the __ nervous system.

Central.

Sensory neurons are primarily located in the __ and organs.

Skin.

Efferent neurons are also known as __ neurons.

Motor.

The role of the endocrine system is often to work in conjunction with the __ system.

Nervous.

The key roles of the nervous system include sensory input, integration, and __.

Response.

The CNS consists of neurons and __ cells.

Glial.

The surface of the brain and spinal cord is covered by protective __.

Meninges.

The __ cells in the PNS provide structural support and isolate neurons.

Satellite.