Awave of sound proceeds through the auditory canal to the inner ear where receptor neurons on the basilar membrane are stimulated. the neurons send a message to the brain. when the brain receives the message, the result is a person thinking, "that sounds like my mom calling me for dinner." what has taken place?

Sensation and perception

Explanation:

When the sound waves pass through the auditory canal where the receptor neurons are stimulated. This description is an explanation of sensation. Sensation means that the person has detected a stimulus.

After the person receives the signal in the brain and thinks "That sounds like my mom calling me for dinner" this indicates that the person has perceived a stimulus. Perception is the interpretation of stimulus which is seen in the case here.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.