Gas Exchange and Circulation

Question 1

Definition of lungs

Answer 1

Infolding to the body surface

Question 2

The circulatory system of lungs

Answer 2

can be open or closed

transports gases between lungs and rest of body

Question 3

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

Answer 3

animal’s metabolic rate

Question 4

Explain the process of negative pressure breathing in birds

Answer 4

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

Question 5

Explain the negative pressure breathing in humans

Answer 5

Air inhaled- lungs and ribs expand

Air exhaled- rib cage and lungs get smaller

Question 6

Breathing is a _____ feedback loop.

Answer 6

negative

Question 7

Explain the process of a negative feedback loop

Answer 7

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

Question 8

Why do we need a respiratory system?

Answer 8

we need O2 in for aerobic respiration and to make ATP

we need CO2 out for waste product from krebs cycle

Question 9

How does the diffusion of gases work?

Answer 9

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

Question 10

Homeostasis: definition and needs

Answer 10

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

Question 11

Needs for exercising

Answer 11

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

Question 12

Needs for disease

Answer 12

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