Long-term Changes Flashcards
Changes in some _ are long lasting and can cause serious long-term problems, especially on return to earth
Physiological processes
Pull of gravity distributes _ and _ to lower parts of body
Blood
Other fluid
In space, body fluid makes _ which has interesting effects
Headward shift
Increased fluid fills facial cavities, making astronauts face look _
Puffy
Legs appear _
Smaller
When body enters microgravity, increase in arterial pressure detected by _
Baroreceptors
Baroreceptors are nerve endings that monitor _
Fluid levels
Baroreceptors send nerve impulses to brain, which in turn stimulate kidneys to _
Rid body of excess fluid
Astronauts tend to _ more frequently
Urinate
Pituitary decreases secretion of _ , making astronaut less thirsty
Anti-diuretic hormone (ADH)
Two factors combine to reduce fluid levels in (2)
Head
Chest
Reduced fluid level in head and chest achieving lower levels within a matter of days than is normal on _
Earth
