Phenotypic variation can be attributed to genetic and environmental influences.

TLS Online TPP Program

#Id: 5623

#Unit 7. System Physiology – Animal

When a small amount of pressure is applied to the Pacinian corpuscle, a nonpropagated depolarizing potential resembling an excitatory postsynaptic potential (EPSP) is recorded. This is called the generator potential or receptor potential

TLS Online TPP Program

#Id: 5624

#Unit 7. System Physiology – Animal

TLS Online TPP Program

#Id: 5625

#Unit 7. System Physiology – Animal

The receptor (Pacinian corpuscle) converts mechanical energy into an electrical response, the magnitude is proportional to the intensity of the stimulus. Thus, the responses are described as graded potentials rather than all-or-none

TLS Online TPP Program

#Id: 5626

#Unit 7. System Physiology – Animal

When the magnitude of the generator potential reaches about 10 mV, an action potential is produced at the first node of Ranvier.

TLS Online TPP Program

#Id: 5627

#Unit 7. System Physiology – Animal

Converting a receptor stimulus to a recognizable sensation is termed sensory coding

TLS Online TPP Program

#Id: 5628

#Unit 7. System Physiology – Animal

Sensory receptors show adaptation, when a constant stimulus is applied for a period of time. Pattern of adaptation are phasic (adapt rapidly to the stimulus)& tonic(adapt slowly to the stimulus)