Those reflex actions which involve brain are calleda)Stimulusb)Cerebra...
The correct answer is B) Cerebral reflexes.
Reflex actions that involve the brain are referred to as cerebral reflexes. These reflexes occur when sensory information is processed and integrated in the brain before a motor response is initiated. Unlike spinal reflexes (option C), which are mediated by the spinal cord alone, cerebral reflexes involve higher-level processing and decision-making in the brain.
The brain plays a crucial role in coordinating complex reflex actions and integrating sensory input with motor output. Examples of cerebral reflexes include the pupillary reflex (controlling the size of the pupil in response to light), the gag reflex (protective response to prevent choking), and the withdrawal reflex (removing a hand from a hot surface).
Options A and D are not correct:
A) Stimulus: A stimulus is any external or internal event that elicits a response from an organism. While stimuli can trigger reflex actions, the term "stimulus" does not specifically refer to reflex actions involving the brain.
D) Reflex arc: A reflex arc refers to the neural pathway that mediates a reflex action. It typically involves a sensory receptor, an afferent neuron, an interneuron in the spinal cord or brain, an efferent neuron, and an effector organ. While reflex arcs can involve the brain, the term "reflex arc" does not specifically describe reflex actions that involve the brain.
Therefore, the correct answer is B) Cerebral reflexes.