How do sensory receptors communicate a stimulus to the brain?
A. Electrical signals
B. Pressure waves
C. Corpuscles
D. Muscle cells
A. Electrical signals
The correct answer is A. Electrical signals.
When a sensory receptor is stimulated by a stimulus, such as touch, sound, light, or heat, it generates an electrical signal called an action potential. This action potential travels along the sensory neuron, which is then transmitted to the brain through the nervous system.
The action potential is essentially an electrical impulse that carries information from the site of the stimulus to the brain. These electrical signals are the language of the nervous system, allowing the receptor to communicate the presence of a stimulus to the brain. Once the electrical signals reach the brain, they are processed and interpreted, resulting in the perception of the stimulus.