Lect 36 respiratory system/gas transport Flashcards
why occurs when you hold your breathe under water
levels of carbon diozide casue reflex to breathe
Q1. Should you hyperventilate before freediving?
a.Yes, it allows you to stay under water longer regardless of carbon dioxidelevels
b.Yes, it clears out carbon dioxide faster so you have more of an urge to breathe
c.No, you have more of an urge to breathe so you can’t stay down as long
d.No, you have less of an urge to breathe so oxygen levels can decrease to
dangerous levels
d.
No, you have less of an urge to breathe so oxygen levels can decrease to
dangerous levels
Q2. Why can you survive longer without taking a breath when you are under cold water than on land?
a.Heart rate increases and blood vessels constrict
b.Heart rate decreases and blood vessels dilate
c.Heart rate increases and blood vessels dilate
d.Heart rate decreases and blood vessels constrict
d.
Heart rate decreases and blood vessels constrict
why cant we breathe while upside down
our organs are up against the diaphrgm and lungs causing it to be hard to breather
Q3. Which of the following adaptations would you predict that sloths have?
a.High blood pressure
b.Valves that prevent blood from pooling in the legs
c.Valves that prevent blood from pooling in the head
d.Low blood pressure
c.
Valves that prevent blood from pooling in the head
what occurs to your body the higher you are in altitude
you get less oxygen and lower pressure
what occures when you are in low altitude
greater pressure , more oxugen
what occurs in high altitude pulmonary edem (HAPE)
blood pressure increased in lungs causes accumulation of interstitial fluid
increases diffusion distance and slows gas exchange
what is high altitude cerebral edema
life threateneing disease and is a form of severe form of acute mountain sickness
leaky capillaries in the brain and causes fluid accumulation/brain swelling
Q4. What are strategies for decreasing the risk of acute mountain
sickness?
a.Change altitude slowly
b.Take slow deep breaths
c.Go up as quickly as possible
d.Take shallow quick breaths
a.Change altitude slowly
b.Take slow deep breaths
what is external respiration
movement of gases between enviroment and body cells
what is external respiration
movement of gases between enviroment and body cells
what is included in external respirtation
transport of oxygen and carbon dioxide by blood
exchange of gases between blood and the cells
is oxygen in blood bound to the hemoglovin
T/F
True about 98%
How does oxygen flow
from alveoli into the vlood ( down pressure gradient)
what occurs when the concentration of free oxygen increases
more oxygen binds to hemoglobin and eq shifts to the right making more oxyyhemoglobin
what occurs if the concentration of oxygen decreases
hemoglobin release oxygen and the amount of oxygemoglobin decreases
Q5. How many cell
membranes does oxygen
have to cross to get from
the alveoli to cells to be
used in cellular respiration?
a.0
b.1
c.2
d.4
e.6
e.6
how does oxygen travel to tissues.
oxugen binds to hemoglobin, which are in red blood cells that are in blood vessels that travel to tussues.
Q6. What would happen if the number of red blood cells are
decreased?
a.No impact on oxygen transport
b.Increased oxygen transport
c.Decreased oxygen transport
c.
Decreased oxygen transport
how does anemia occur
you dont have enough red blood cells or the rbc dont function properly
Q7. If you could increase
the number of hemoglobin
molecules in red blood
cells, how would that affect
mountain climbers at
Mount Everest?
a.increase high altitude
sickness
b.Decrease high altitude
sickness
c.No impact on high
altitude sickness
b.
Decrease high altitude
sickness
