Blood pressure increases and heart rate decreases in response to :

• exercise

• haemorrhage

• exposure to high altitude

• increased intracranial pressure

D.

increased intracranial pressure

Intracranial pressure (ICP) is a measurement of the pressure of brain tissue and the cerebrospinal fluid that cushions and surrounds the brain and spinal cord. It is used to monitor the health of the brain after an injury. 

If intracranial pressure is rapidly increased, the cerebral blood flow is. The increase in intracranial pressure stimulates the vasomotor centre and increases systemic blood pressure. It means blood pressure increases and heart rate decreases.