What is the pathway of an impulse in a reflex arc?
Reflex arcs Sensory neuron sends electrical impulses to a relay neuron, which is located in the spinal cord of the CNS. Relay neurons connect sensory neurons to motor neurons. Motor neuron sends electrical impulses to an effector. Effector produces a response (muscle contracts to move hand away).
What is the correct order of steps in a reflex arc?
Stimulus, sensory neuron, intermediary neuron, motor neuron and defector organ is the correct order of general reflex arc.
Which sequence represents the course of an impulse over a reflex arc?
Nervous system cells notes
| Question | Answer |
|---|---|
| Which sequence best represents the course of an impulse over a reflex arc? | receptor, sensory neuron, interneuron, motor neuron, effector |
| A complete nerve, consisting of numerous fascicles and their blood supply, is held together by a fibrous coat called the | epineurium |
What are the 4 steps of a reflex action?
The reflex arc
- A receptor in the skin detects a stimulus (the change in temperature).
- Sensory neurones send electrical impulses to relay neurones, which are located in the spinal cord.
- Motor neurones send electrical impulses to an effector.
- The effector produces a response (muscle contracts to move hand away).
What are the 5 steps of a reflex arc?
So the reflex arc consists of these five steps in order-sensor, sensory neuron, control center, motor neuron, and muscle. These five parts work as a relay team to take information up from the sensor to the spinal cord or brain and back down to the muscles.
What are the 5 components of a reflex arc?
FIGURE 7-1 A reflex arc contains five fundamental components: 1, a receptor; 2, a sensory neuron; 3, one or more synapses in the CNS; 4, a motor neuron; and 5, a target organ, usually a muscle.
What is the correct order of the 5 basic components of a reflex arc?
Reflex Arc Components. Most reflex arcs have five main components: receptors, sensory neurons, interneurons, motor neurons and muscles.
What is the correct order of steps in a reflex arc quizlet?
Place the following events of a reflex arc in the correct order: 1) motor neuron activation, 2) sensory neuron activation, 3) sensory receptor activation, 4) Information processing, 5) effector response.
What are the 5 steps of reflex?
What is the first step in the activation of a reflex arc?
Step 1: Arrival of stimulus, activation of receptor. Only 1 synapse in reflex arc, sensory neuron synapses directly onto motor neuron. More than 1 synapse in reflex arc.
What are the five components of any reflex?
Where does the impulse start in the reflex arc?
Reflex arc starts with a stimulus. The stimulus must be sufficiently strong to initiate impulse in sensory neuron. Sensory neuron carries the impulse to intermediary neuron. Intermediary neuron carries the impulse to appropriate motor neuron. Motor neuron send the impulse to either muscle or gland.
What is the sequence of neurons involved in a reflex arc?
What is the sequence of neurons involved in a reflex arc? 1 Receptor- sense organ in skin/muscle/organ. What is the second step in a reflex arc? 2 Sensory Neuron- carries impulse towards CNS. What is the third step in a reflex arc? 3 Interneuron- carries impulse w/in CNS. 4 Motor neuron- carries impulse away from CNS. 5
Which is an example of the general reflex arc?
Intermediary neuron carries the impulse to appropriate motor neuron. Motor neuron send the impulse to either muscle or gland. Example of general reflex arc is pricking the needle to a finger. Ultimate action is withdrawal of hand. Anatomy & Physiology Science
Stimulus, sensory neuron, intermediary neuron, motor neuron and defector organ is the correct order of general reflex arc.