NOTES !! Flashcards
How nervous tissue is involved in body function regulation ?
-Every neuron has two core function :
1-impulsation cunduct : impulses pass by nerves between the CNS and prephral organs thats is the essence of the local currents irradiation on the membrane neurons
2- impulsation processing : during 1 second of the spinal cord receives the amount of information equal to information volume which is contained in some greatest library and its received it in form of AP
What is the purpose Of CNS ?
Is implementation of the nervous regulation of peripheral organs
Nervous regulation is carried out on ?
Its carried out on the basis of reflexes
What is the definition of reflex arc ?
And give an example
A reflex is a response of an organism mediated through the central nervous system
Ex: arm withdrawal upon finger
What is the bruise ( hematoma)?
Its also reaction to mechanical action on subcutaneous tissue, and CNS doesn’t take part in it
Its also reaction to mechanical action on subcutaneous tissue, and CNS doesn’t take part in it
1- receptor 2-afferent neuron 3- central neuron 4- motor element 5-effector
Explain the 2nd element of reflex arc
Its a sensitive or afferent or cerebriptal element
- its consist of dendrite ( long ) and axon ( short )
- an afferent neuron conducts the impulse from receptive field to the central nervous system
-anatomical charectrastic :
The totality of nighboured dendrites of sensitive neurons forms sensory nerve , the totality of nighboured bodies of neurons form the prevertbral gangelia , the totality of the neighboured axons forms the posterior cerbrospinal root .
- was decicrived in Bell-Magendie experiment.
Explain the 3rd element of reflex arc
- its central element : its represented by one or multiple intercalary neurons , thats is why this element is often called intercalary element, its located only in the central nervous system
- and its perform 4 function :
1- its connect the afferent and motor components
2-its connects different reflex arc within the limits of one cns part
3-its connect of reflex arcs of different division of CNS ex spinal cord and brain
4: its processes information - body of the intercalary neuron form the post horn of the spinal cord
Tell me one of the main function of the body ?
Is the mentanance of homeosatsis
What is the regulation mean ?
Is the changeing the course of any function or process with purpose if achieving a particular result
What is the hormons
Hormons is a substance secreted by glands if internal secetion into the blood stream , and its regulate the actevites of various ograns ans systems of whole body
What is the central nervous regulation ?
Its level which is able to modfiy the activtiy of all organs and body system is implmented by CNS
What is the classfication of CNS anatomaclly
Spinal cord , brain , mudulla oblongata mid brain
What us the parts of the CNS function physiologcally ?
- Somatic nervous system (SoNS)- main
- vegtative nervous system (VNS) Mian
- meta sympathatic nervous system (MNS) saidly
What is the main deffreince between SoNS and VNS
1-higher centers 2- lower centers 3 - motor Element 4- mediator 5- receptors 6 - segmntal metamaric 7 - Effector 8- functonial deffrencises 9 -voronterness
