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April 22nd
Pages 313- 324, Chapter 8 and 9
14
Anatomy
Undergraduate 1
04/21/2013

Additional Anatomy Flashcards

 


 

Cards

Term
Autonomic nervous system
Definition
  • carries sensory and motor signals to and from the hypothalamus that operate automatically, without conscious awareness and beyond voluntary control
Term
Perganglionic neurons
Definition
  • first neuron
Term
Postganglionic neuron
Definition
  • second neuron
  • unmyelinated
Term
Varicosities
Definition
  • serve a broad area by allowing the neurotransmitter to diffuse more widely than in a motor synapse
  • swollen axon portions
  • releases neurotransmitters
Term
Sensing
Definition
  • the detection of a stimulus by a sensory receptor
Term
Sensation
Definition
  • conscious perception of the sensory signal
Term
Proprioception
Definition
  • our perception of the position of body parts relative to one another
Term
Visceral senses
Definition
  • structures and mechanisms that detect changes in our internal environment
  • do not produce sensation
Term
Somatic senses
Definition
  • simple structures with uncomplicated detection mechanisms
  • distributed in skin, muscle, bones, joints, and other tissues
  • signals they generate are integrated into consciousness
  • example= touch
Term
Special senses
Definition
  • complex sstems with sophisticated appartus
  • vision, smell, taste, hearing
  • signals are integrated in conscious
Term
Adaptation
Definition
  • a decrease in the signal strength generated by the receptor during prolonged steady-state stiumlation
Term
1st order neurons
Definition
  • the process of the sensory neuron will carry the signal past the cell body in the dorsal root ganglion and through the dorsal root into the sinal cord and up through the posterior column to the medulla oblongata
Term
2nd order neuron
Definition
  • cross over to the left side within the medulla and proceed to the thalamus
Term
third order neurons
Definition
  • takes the signal to the primary sensory cortex region responsible for the ingex finger
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