Human Phys 5.2

Question 1

What are the reflex mechanisms for BP control?

Answer 1

Baroreceptor reflex

Chemoreceptor reflex

Atrial and pulmonary artery reflex (bainridge reflex)

CNS ischemic response (Cushing reaction)

Abdominal compression reflex

Respiratory sinus arrhythmia

Question 2

Pathway of how baroreceptors work

Answer 2

Baroreceptors measure BP

BP measure is sent to the medulla which has a set BP for the body

Medulla sends control signals to the blood vessels

Blood vessels will change TPR to effect BP

Question 3

What happens as pressure increases in the baroreceptor response to BP?

Answer 3

Leads to increased parasympathetic and decreased sympathetic

Question 4

Increased blood pressure pathway

Answer 4

Increased baroreceptor firing leads to

Increased cardiac inhibitor centers, decreased accelerator centers, decreased vasomotor center leads to

Decreased CO, increase vasodilation leads to

BP drops and homeostasis restored