Human Breathing

Question 1

Why does breathing rate go below resting rate after exercise

Answer 1

Deeper breathing means co2 is exhaled and o2 is inhaled faster

Question 2

What is homeostasis

Answer 2

The way an organism maintains a constant internal environment

Question 3

Name the structures located at the end of the breathing tract involved in gaseous exchange

Answer 3

Alveoli

Question 4

Identify the gas, soluble in blood plasma which controls the rate of breathing.

Answer 4

Carbon dioxide.

Question 5

What are the adaptions for gas exchange

Answer 5

Curved shape of alveoli increases surface area for diffusion.
Walls of alveoli and capillaries are one cell thick, faster diffusion
Warm, moist air in alveoli faster diffusion

Question 6

Explain the process of exhalation and inhalation

Answer 6

Inhalation
- intercostal muscles and diaphragm contract
- rib cage swings up and out
-Diaphram flattens
Volume in chest cavity increases
-pressure in chest cavity decreases
- air is taken in through nose/mouth

Exhalation
- intercostal muscles and diaphram relax
-rib cage swings down and inward
-diaphram curves inward
-volume in chest cavity decreases
-pressure of chest cavity increases
-air is forced out through nose/mouth.