Final answer:
The process by which Keisha's mechanoreceptors convert pressure into action potentials sent to the brain is called b) transduction. This is a critical aspect of sensory perception where a physical stimulus is converted into an electrical nerve signal.
Step-by-step explanation:
When Keisha's mechanoreceptors respond to pressure and convert that energy to action potentials which are then sent to the brain, the process is known as transduction. This process is crucial for converting various types of sensory input, such as pressure, into a nerve signal that the brain can interpret. Upon the activation of mechanoreceptors by a stimulus like pressure, gated ion channels open, leading to a change in electrical potential.
If this depolarization is strong enough to reach a certain threshold, an action potential is generated. This action potential then propagates along the axon and uses neurotransmitters at synapses to communicate with other neurons, eventually conveying the sensory information to the brain for processing.
Hence, the correct answer is Option B.