Question

how many of the following sentences are correct?

1) Odorant molecules increase the intracellular concentration of cAMP in primary sensory neurons. 2) Axons of primary sensory neurons form cranial nerve I. 3) The olfactory bulb contains secondary sensory neurons. 4) Sensory information associated with the sense of smell goes to the thalamus before reaching the olfactory cortex.

Answer 1

1 , 3 and 4 are correct

The odorant molecules cause the increase of cAMP concentration increase in the primary sensory neuronm. The cilia of the nose receive the stimuli and trigger this cascade

2 ) not only the axons of sensory neuron but the motor neuron are also included in formation of crania nerve's

3) olfactory bulb contain projection and interneurons which are main secondary sensor neurons

4) the sensory information goes to thalams to get linked as well as to retain memory of the smell