Which sequence correctly shows the path of a nerve impulse in a reflex arc?
Answer and explanation
Correct answer: C. Receptor, sensory neuron, interneuron, motor neuron, effector
- Step 1: A stimulus is detected by the receptor and carried to the spinal cord and then to an effector.
Answer
Receptor, sensory neuron, interneuron, motor neuron, effector.
Why not the others: Receptor, motor neuron, interneuron, sensory neuron, effector: the sensory and motor neurons are in the wrong order. Effector, motor neuron, interneuron, sensory neuron, receptor: this is the reverse of the path. Receptor, interneuron, sensory neuron, motor neuron, effector: the interneuron comes after the sensory neuron.
Practise more Human systems: endocrine, nervous and reproduction.
Free questions with an explanation for every one, and full timed South Africa Matric mock tests.
More Human systems: endocrine, nervous and reproduction questions
- Which gland is often called the 'master gland' of the endocrine system?
- Antidiuretic hormone (ADH) helps to regulate the water balance of the blood by
- A negative feedback mechanism
- On a hot day, the blood vessels in the skin of a healthy person
- In bright light, the pupil of the eye
- Which part of the brain is mainly responsible for balance and the coordination of muscle movements?