aging 2 cognitive

Question 1

what are some causes for reductions in cognition with age?

Answer 1

hippocampal and prefrontal cortex volume decrease

sedentary behavior

dopamine depletion

synaptic degeneration

atrophy of grey and white matter

Question 2

how can exercise help to ameliorate reductions in cognition?

Answer 2

delivers more blood to the brain which helps tissues grow

counteracts sedentary lifestyle
improves hormonal response

Question 3

define shear stress (within a blood vessel)

Answer 3

fictional force of blood against the lumen wall during exercise

Question 4

how does blood flow to the brain change from rest to exercise?

Answer 4

exercise increases regional brain blood flow in a structurally specific and intensity-dependent manner (up to 70% increase)