The frontal lobe contains most of the dopamine-sensitive neurons in the cerebral cortex. The dopamine system is associated with reward, attention, short-term memory tasks, planning, and motivation. Dopamine tends to limit and select sensory information arriving from the thalamus to the forebrain.
Na + concentration is lowered, indicating that Na + in-flux is responsible for the rising phase of the action po-tential. Their data also suggested that the falling phaseof the action potential was caused by a later increase inK+ permeability.
concentrations, and by decreases in blood pressure; renin release is inhibited by. angiotensin II, aldosterone, and by elevated blood pressure. Note that angiotensin II also acts as a vasoconstrictor; thus both angiotensin II and. aldosterone are directly involved in raising blood pressure.