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level: NERVES

Questions and Answers List

level questions: NERVES

Question	Answer
Responsible for coordinating and controlling many body activities (stimulates muscle contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning).	Nerve Tissue
Detectable change in the physical or chemical structure of an organism's internal or external environment.	Stimulus
The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made	Sensitivity
An analog device that draws a graphical representation of spatial position over time in which a spatial axis represents time	Kymograph
A kymograph consists of a _____ _____ wrapped with a sheet of paper on which a stylus draws, to record measured changes of phenomena such as motion or pressure.	revolving drum
Happens when a nerve is stimulated and the muscle relax and contracts.	Simple Muscle Twitch
The time taken from the point of the stimulus to start of contraction.	Latent Period
Start of contraction to the maximum strength of contraction	Contraction Period
When the muscle starts relaxing from the maximum point of contraction to end of relaxation	Relaxation Period
This means that the inside of the neuron is 70 mV less than the outside	Resting Membrane Potential (RMP)
Occurs when the membrane potential of a specific cell location rapidly rises and falls (Depolarization)	Action Potential
It is the site for the transmission of action potential from nerve to the muscle.	Neuromuscular Junction
Describes the rapid communication between electrical events occurring in the plasma membrane of skeletal muscle fibers and Ca2+ release from the SR, which leads to contraction	Excitation Contraction Coupling
When a motor unit receives a stimulus of sufficient intensity to bring forth a response, all the muscle fibers within the unit will contract at the same time, and to the maximum possible extent	All or None Principle
Is the process by which different motor units are activated to produce a given level and type of muscle contraction	Motor Unit Recruitment
Physiological unit of the Nervous System	Neuron (nerve cell) and its corresponding nerve fibers
2 classification of nerve fibers based on the character of the results of impulses	Afferent (sensory) and Efferent (motor) nerve fibers
Form of stimulation based on the procedure: Pinch the free end of the nerve immediately release after a tracing is recorded.	Mechanical stimulation
Form of stimulation based on the procedure: Touch the free end of the nerve lightly with a warm glass rod and release after a tracing is recorded.	Thermal stimulation
Form of stimulation based on the procedure: Place few crystals of NaCl on the free end of the nerve and release after a tracing is recorded.	Osmotic type stimulation
Form of stimulation based on the procedure: Dip the free end of the nerve in a 50 mL beaker filled with 1% HCl solution.	Chemical stimulation
Form of stimulation based on the procedure: Place the stimulating electrode in a fixed position under the nerve. Apply a mild shock by using a single stimulation from the inductorium with the potentiometer set at 3 or 4.	Electrical stimulation