Card Set Information
Nervous Endocrine system
Uses sensory receptors to monitor changes occurring both inside and outside the body
Processes and interprets the sensory input and makes decisions about what should be done at each moment
Dictates the responses by activating the effector organs (Muscles and glands
Brain and Spinal Cord
Cranial Nerves– efferent and afferent, to and from the brain
Spinal Nerves– efferent and afferent, to and from spinal cord
Responses based on past experience, reflexes, and current conditions
Intelligence, memory, learning, and emotion
Integrating, processing, and coordinating
The afferent division of the PNS brings _______ information to the CNS
The efferent division carries _____ commands to muscles and glands.
Two divisions of the efferent division:
Somatic nervous system
Controls skeletal muscle contractions
voluntary or involuntary
Autonomic nervous system:
Is also called visceral motor system.
Regulates smooth muscle, cardiac muscle, and glands.
Provides the vital link between sensory inputs and motor responses in the real world
The efferent division begins inside the (a) and ends at an (b)
- Controls skeletal muscle contractions.
- May be voluntary or involuntary.
-Is also called visceral motor system.
-Regulates smooth muscle, cardiac muscle, and glands.
Basic structural unit of nervous system.
3 characteristics of a neuron:
-High metabolic rate (O2 and glucose)
Resist tension forces
Clusters of cell bodies in the PNS
Renew the cell membrane- protein part of the cytoplasm
Numerous, receptive, sites from other neurons. Conduct electrical signals toward the cell body
Lower extremity axons extend from the lumbar region into the foot
Impulse generators and conductors that transmit nerve impulses
from the cell body
Axon collaterals: Extend from the axon at ____ angles
End branches of the axon.
Bulbs that contact other neurons to form specialized cell junctions called synapses
3 Functions of neuroglia:
-Providing the framework for the neural tissue
-Maintaining the intercellular environment
-Acting as phagocytes
Largest and most numerous glial cells
5 Functions of Astrocytes:
-Maintaining the blood–brain barrier.
-Creating a three-dimensional framework for the CNS.
-Performing repairs in damaged neural tissue.
-Guiding neuron development.
-Controlling the interstitial environment.
Macrophages of CNS