Chapter 9: Review of previous material

A nerve impulse involving sodium rushing into the ICF of a neuron followed by potassium rushing out of a neuron into the ECF.

Form the blood brain barrier by attaching neurons to blood vessels. Form pillars to support the neurons. Form scar tissue when damage occurs.

Nervous system branch that controls involuntary muscles called cardiac and smooth muscles.

A barrier to screen what substances can enter the brain’s tissue fluids. One of the Astrocyte’s functions.

Clear, watery fluid found in the meninges and ventricles of the brain and spinal cord. Rich in glucose and proteins.

Many interneurons cross from the right side of the CNS to the left side and vice versa.

Sodium rushing into the neuron’s cytoplasm (ICF) through gated channels in the neuron’s plasma membrane.

The cavity that contains the spinal and cranial cavity.

Neuroglial cells that line the brain’s ventricles and produce CSF.

The “hole” in the occipital bone in which the spinal cord travels through.

Made of dendrites, cell bodies and their synapses.

Nerve cells that are found only in the CNS. They are important in carrying messages from sensory neurons to the processing centers, connecting processing centers to allow the brain to integrate (put together) all information, and carrying decisions by connecting processing centers to motor neurons.

Small neuroglial cells that wander (move) through the CNS tissue. Capable of phagocytosis.

Neurons in the PNS that carry messages away from the CNS (brain and spinal cord).

Non-excitable cells that support and protect the neurons. Mitotic thus are the most frequent cause of brain tumors.

Excitable cells. Nonmitotic due to lack of centrioles.

Produces the myelin sheath on CNS interneurons.

A protective reaction by the nervous system to help maintain homeostasis.

Potassium rushing out of the neuron into the ECF through gated channels located in the neuron’s plasma membrane.

Neurons in the PNS that carry messages towards the CNS (brain and spinal cord).

Nervous system branch that controls voluntary muscles called skeletal muscles.

Part of the CNS. Can serve as a reflex center and/or connection from the PNS to the brain processing centers.

Cerebrospinal fluid

Groups of nerve axons (fibers) that travel in the white matter of the CNS.