Flight And Space Physiology (ppt) - Dr. Miyake

Question 1

At beginning of flight: _________ occurs.

Answer 1

Simple linear acceleration

Question 2

At end of flight: _________ occurs

Answer 2

Deceleration

Question 3

Every time vehicle turns:

Answer 3

Centrifugal acceleration occurs

Question 4

Acceleration in one direction shifts the blood volume in the ____________.

Answer 4

Oppposite direction

Question 5

To accelerate a rocket from rest, we must apply enough ______ to overcome its inertial force.

Answer 5

Force

Question 6

With the rocket accelerating vertically, astronauts inside experience an inertial G force, as required by Newton’s third law.

Answer 6

Newton’s second law of motion

Question 7

A force that presses the astronauts into their seats in the direction opposite that of the rocket’s acceleration.

Answer 7

Newton’s third law

Question 8

Force with which he is pressing against the seat results from the pull of gravity and is equal to his weight (equal to the pull of gravity)

Answer 8

+1G

Question 9

Force with which he presses against seat becomes 5x his normal weight during pull-out from a dive, force acting on the seat is ______.

Answer 9

+5G

Question 10

If airplame goes through an outside loop so that the person is held down by his seat belt, __________ is applied to his body.

Answer 10

Negative G

Question 11

If the force with which he is held down by his belt is equal to the weight of his body, the negative force is ______.

Answer 11

-1G

Question 12

We all experience ___________ when an aircraft hits turbulence, suddenly loses altitude and lifts us out of our seats.

Answer 12

Negative G force

Question 13

Have potentially large effects on aircraft pilots, astronauts affect only during litoff and re-entry phases of space flight.

Answer 13

G forces

Question 14

Propel body’s tissues in direction opposite that of acceleration.

Answer 14

G forces

Question 15

Compress soft tissues against underlying structural elements (bone) or pull these tissues away from overlying structural elements.

Answer 15

G forces

Question 16

Shift blood volume away from direction of acceleration, addning to other component forces that determine blood pressure.

Answer 16

G force

Question 17

Can shift blood volume away from the head.

Answer 17

G forces

Question 18

Resulting in transient reductions in cerebral blood flow and oxygen delivery

Answer 18

G forces

Question 19

If reductions are sufficiently large, they can result in loss of consciousness.

Answer 19

Gray-out

Question 20

Early warnings: narrowing of visual field (loss of peripheral vision) and loss of color perception as retina is deprived of oxygen, a phenomenon called ___________.

Answer 20

Gray-out

Question 21

Total loss of consciousness that occurs during acceleration that lasts for tens of seconds or minutes

Answer 21

Blackout

Question 22

Causes a cephalad shift of blood volume

Answer 22

Weightlessness

Question 23

State of near-zero G force, also called a ___________.

Answer 23

Microgravity environment

Question 24

Centrifugal force of spacecraft’s orbital trajectory balances earth’s gravitational force.

Answer 24

Weightlessness

Question 25

Cephalad shifts of blood volume-away from capacitance vessels of legs-expands ____________, increases cardiac preload and increases filtration of plasma water into interstitium of facial region.

Answer 25

Central blood volume