Which of the following is correct pathway during reflex action?
a) peripheral branch of sensory neuronàdorsal root of ganglianàcentral branch of sensory neuronàbrain
b) peripheral branch of sensory neuronàdorsal root of ganglianà central branch of sensory neuronàspinal cords
c) central branch of sensory neuronà dorsal root of ganglianàperipheral branch of sensory neuronàspinal cords
d) peripheral branch of sensory neuronàventral root of ganglianàcentral branch of sensory neuronàspinal cords
Nerve Impulse
Nerve impulse is information about …… that is transmitted from receptors to CNS and from CNS to the effectors.
a) chemicals
b) stimulus
c) temperature
d) humidity
Explanation any change in external or internal environment is called stimulus e.g. temperature, thirst etc
A nerve impulse is a wave of…….change that travels along the length of neuron from one to another.
a) electrical
b) chemical
c) electrochemical
d) physical.
Explanation a nerve impulse is called an action potential (AP) because it involves a change in electrical potential that moves along the nerve cell.
In nerve impulse conduction, electricity made with chemical ions and molecules; which are……
a) Na+ and K+
b) charged bearing organic molecules
c) Ca++ and Cl-
d) both a and b
During the transmission nerve impulse, ions and molecules move across membrane through …..
a) gates and pumps
b) carbohydrate channels
c) phospholipids layer
d) both a and b
Explanation pumps perform active transport while gates perform facilitated diffusion
