Sensory input from both mechanoreceptors and chemoreceptors is relayed to the CNS in response to stimulation. Autonomic motor output is then relayed through cranial nerves to organs of the GI tract. These are referred to as the short reflexes.
a) true
b) false

FALSE

Explanation: Short reflexes(Intergraded by the ENS) are also known as local reflexes,they occur with the neurons if the enteric nervous system that are housed within the gastrointestinal tract wall.

They involve the direct stimulation of a postganglionic fiber by the sensory neurone.

Long reflexes (Intergrades by the CNS) occurs when sensory inputs from receptors is related to the central nervous system in response to stimulation,they involve feedforward reflexes and emotional reflexes also called cephalic reflexes because they originate in the brain.

From the question,there is involvement of chemoreceptors and mechanoreceptors inputs being relayed to the CNS which shows long reflex action.

enzyme speed up the reactions

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)]