Synapses would be the outlets or junction boxes that connect the current to a lamp (or other electrical appliance of your choosing), allowing the lamp to light. chemical synapses are, for the most part, unidirectional. This delay may reflect the several steps required for signal transmission = the release and action of a Synapses are composed of three main parts: Synapses Connect Neurones. Of these, one is monosynaptic, the other is bisynaptic and the third is polysynaptic. (1) The stretch reflex. • There is a delay of ~0.3 – 5 msec between the arrival of information at the presynaptic terminal and its transfer to the postsynaptic cell. 1 of 11. Biology; Nervous system, hormones and behaviour; GCSE; AQA; Created by: 12eyoung; Created on: 10-04-17 21:42; What are synapses and what do they do? Reflex actions. Although the stretch reflex pathway is monosynaptic (just two neurons and one synapse), a polysynaptic reflex arc to the antagonistic muscles operates at the same time. Reflexes can also be categorized by the number of synapses they involve (monosynaptic reflex versus polysynaptic reflex) or the relative position of the sensory receptors to the responding muscles (ipsilateral = same side of the body, contralateral = opposite sides of the body). They connect neurones --> the connection between two neurones is called a synapse. Hide Show resource information. 0.0 / 5. Study Synapses and Reflexes flashcards from Kimberley Stoker's class online, or in Brainscape's iPhone or Android app. Learn faster with spaced repetition. Reflexes are … The flexor reflex, which removes a limb from a noxious stimulus, has a minimum of two interneurons and three synapses. Reflexes Help Prevent Injury. Synapses and Reflexes. The α-motoneurons are involved in three types of reflexes. All reflexes have an afferent pathway that uses a specific type of sensory receptor, at least one synapse in the pathway, and an efferent pathway that connects to a muscle or gland. If a light is flashed near one eye, the pupils of both eyes contract. How Neurotransmitters Work and What They Do. A synapse is the connection between two neurones. The site of the synapse is generally within the spinal cord, although the enteric nervous system also participates in reflex activity confined to the gut wall. Chemicals diffuse through the gap and transfer the signal, which then sets off a new chemical signal in the next nurone. Probably the best-known reflex is the pupillary light reflex. Depending upon the number of synapses in the reflex arc, the reflex may be monosynaptic, bisynaptic or polysynaptic. Parts of the Synapse . This arc involves three neurons and two synapses. A reflex action is a way for the body to automatically and rapidly respond to a stimulus to minimise any further damage to the body. It happens without any consciousness and is immediate. Synapses and Reflexes. Reflex, or reflex action, is the involuntary movement of any organ or body part that has received a stimulus.