Unit 5 Phys Nervous Tissue, Part A Nervous System Organization

Endocrine system

The nervous system and ___________________ are the two primary control systems of the body

Nerve

A _____________ is a bundle of hundreds to thousands of axons plus associated connective tissue and blood vessels.

Central nervous system (CNS) and Peripheral nervous system (PNS)

The two major divisions of the nervous system are the:

Include their abbreviation in parentheses.

Central nervous system (CNS)

The division of the nervous system that is consists of the brain and spinal cord. Include abbreviation in parentheses.

Somatic nervous system

Subdivision of the peripheral nervous system (PNS) that controls voluntary activities such as the activation of skeletal muscles

Peripheral nervous system (PNS)

Nervous system division that consists of nerves (cranial and spinal) that lie outside the CNS and contains sensory and motor neurons. Include abbreviation in parentheses.

Autonomic nervous system (ANS)

Subdivision of the peripheral nervous system (PNS) that regulates the activity of the heart, smooth muscle, and glands; it is also called the involuntary nervous system. Include abbreviation in parentheses.

Sympathetic division

Subdivision of the autonomic nervous system that functions in the "fight or flight" response.

Parasympathetic division

Subdivision of the autonomic nervous system that functions in visceral processes that restore and conserve energy; "rest-and-digest" activities or "feed and breed".

Ganglia

Term for the collection of nerve cell bodies located in the PNS.

Nucleus

Collection of nerve cell bodies located in the CNS

Synapse

Term for the junction between two neurons or between a neuron and an effector (muscle or gland) cell. Can be categorized as either an electrical or chemical.

Neuromuscular junction

Type of synapse between a motor neuron and a muscle fiber.

Neuroglandular junction

Type of synapse between a neuron and a glandular cell.

12 pairs

How many pairs of cranial nerves do you have?

31 pairs

How many pairs of spinal nerves do you have?

Sensory or afferent neurons

Type of neurons that transmit nerve impulses from somatic receptors of the skin and for special senses of vision, hearing, taste, and smell to the CNS. Give both names.

Motor or efferent neurons

Type of neurons that transmit impulses from the CNS to skeletal muscles.

Responsible for reflex and voluntary control of skeletal muscle. Give both names.

Smooth muscle, cardiac muscle, and glands

Motor or efferent neurons of the autonomic nervous system transmit impulses from the CNS to what three effectors.

Gray matter

What type of matter contains unmyelinated neuron cell bodies, dendrites, axons and neuroglial cells?

White matter

What type of matter contains myelinated neuron fibers (processes)?