Unlearned, involuntary responses that occur automatically in the presence of certain stimuli are known as

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

b) the inside picture would look at a very high temperature in a very low ph