Nervous Sytem pt 1 - page 1

Movement toward the cell body is called

Movement away from the cell body is called

The presynaptic terminals store many secretory vesicles that contain signal molecules called _______

Axons terminate by branching to form small extensions with enlarged ends called ______

The combination of the axon hillock and the initial segment is called the ____ where action potentials are generated

Many dendrite surfaces have small extensions, called ______, where axons of other neurons form synapses with the dendrites.

extensions of the cell body and are the receiving portion of the neuron

the source of information for protein synthesis in the neuron

support and protect neurons and perform other functions

receive stimuli, conduct action potentials, and transmit signals

There are two cell types that make up the nervous system:

consists of plexuses within the wall of the digestive tract. an independent subdivision of the PNS that is integrated with the ANS

the rest-and-digest division, regulates resting functions, such as digesting food or emptying the urinary bladder

the fight-or-flight division, most active during physical activity

The ANS is subdivided into two divisions:

the junction of a neuron with another cell.

Axons extend through nerves to form connections with skeletal muscle cells. Each of these connections, called a ______

an involuntary (unconscious) division

a voluntary (conscious) division

The motor division is further divided into two subdivisions:

transmits action potentials from the CNS to effector organs, such as muscles and glands.

transmits electrical signals, called action potentials, from sensory receptors in the body to the CNS

The PNS has two subdivisions:

an extensive network of axons and, in some cases, neuron cell bodies, located outside the CNS

a collection of neuron cell bodies located outside the CNS

there are ___ pairs of nerves originating from the spinal cord, called _______

There are __ pairs of nerves originating from the brain, called ___,

a bundle of many axons that connects the CNS to sensory receptors, muscles, and glands.

Where are the sensory receptors located?

the endings of neurons, or separate, specialized cells that detect temperature, pain, touch, pressure, light, sound, odor, and other stimuli.

send electrical messages from their cell body to other cells

Cells of the nervous system are called

carries information about the different tissues of the body to the CNS and carries commands from the CNS that alter body activities

It links the CNS with the various parts of the body.

consists of all the nervous tissue outside the CNS (nerves and ganglia).

It consists of the brain and the spinal cord.