Answer:
b. causes constriction of cerebral blood vessels in response to a drop in systemic blood pressure
Explanation:
No matter what happens or fluctuations occur in the blood pressure of body the blood pressure to the brain is always kept constant by the necessary changes and means possible. The blood value is always maintained at 50mL per 100g of Brain Tissue. The constriction of blood vessel keep the blood pressure normal to the brain in case of low blood pressure. Otherwise, it can have deadly consequences.
#1 is CO2 exchange. CO2 is diffusing from the blood into the alveoli for expiration.
#2 is O2 exchange. O2 is diffusing from the alveoli into the blood to be carried to the tissues.
Answer:
plates moving
rocks breaking
movement below the surface
Explanation:
