Gas Exchange and Circulation Flashcards

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1
Q

Definition of lungs

A

Infolding to the body surface

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2
Q

The circulatory system of lungs

A

can be open or closed

transports gases between lungs and rest of body

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3
Q

What does the size and complexity of the lungs correlate with?

A

animal’s metabolic rate

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4
Q

Explain the process of negative pressure breathing in birds

A
  1. breathes in to posterior air sac
  2. breathes out to lungs
  3. breathes in to anterior air sac
  4. breathes out air fully
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5
Q

Explain the negative pressure breathing in humans

A

Air inhaled- lungs and ribs expand

Air exhaled- rib cage and lungs get smaller

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6
Q

Breathing is a _____ feedback loop.

A

negative

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7
Q

Explain the process of a negative feedback loop

A

organs - carbon dioxide - carbon dioxide binding - removes excess carbon dioxide - lungs - oxygen from pulmonary alveolus - red blood cell - back to organs organs

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8
Q

Why do we need a respiratory system?

A

we need O2 in for aerobic respiration and to make ATP

we need CO2 out for waste product from krebs cycle

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9
Q

How does the diffusion of gases work?

A

it is a concentration gradient where pressure drives movement of gases into and out of blood at lungs and body tissue.

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10
Q

Homeostasis: definition and needs

A

Keeping internal environment of body balanced.
need to balance O2 in and CO2 out
need to balance energy (ATP) production

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11
Q

Needs for exercising

A

we breathe faster so we need more ATP, we need to bring in extra O2 and remove extra CO2

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12
Q

Needs for disease

A

causes us to breathe faster which makes us need to work harder to bring in 02 and remove CO2

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