Module 4.1 Flashcards
What is the Bell-Magendie law?
entering dorsal roots (axon bundles) carry sensory info and exiting ventral roots carry motor information
What makes up gray matter?
cell bodies and dendrites
What makes up white matter?
myelinated axons
What are the two parts of the autonomic nervous system?
sympathetic nervous system and parasympathetic nervous system
Give location and function of sympathetic nervous system.
prepares organs for vigorous activity located to the left and right of the spinal cord
Give location and function of parasympathetic nervous system.
facilitates vegetative, nonemergency responses in the brain stem and lower part of spinal cord
Which transmitter do the postganglionic parasympathetic nerves use?
acetylcholine
Which transmitter do the postganglionic sympathetic nerves use?
norephinephrine
What are the main components of the hindbrain?
medulla, cerebellum, and pons
What are the cranial nerves?
Nerves that control sensory and motor information of the head
What are the anatomical locations and functions of the reticular formation and the raphe system
They are located in the medulla and pons. The reticular formation controls motor areas of the spinal cord. The raphe system sends axons to much of the forebrain, modifying the brains readiness to respond to stimuli.
What are the major structures of the limbic system? What are the general functions of the system?
The general function is the control of emotions and motivations. The major structures are olfactory bulb, hypothalamus, hippocampus, amygdala, and cingulate gyrus of the cerebral cortex.
Describe the relationship of the thalamus to the cerebral cortex.
Sensory info goes into the thalamus which processes it and sends it to the cerebral cortex
What behaviors does the hypothalamus regulate?
motivated behaviors
Where is the pituitary? What is its function? What structure largely controls it?
It is attached to the base of and controlled by the hypothalamus. It synthesizes and releases hormones into the bloodstream.
