Ch. 11 Respiration and gas exchange !!! Flashcards
What do our cells need energy for?
- Contracting muscles
- Making proteins
- Cell division
- Active transport
- Growth
- Transmitting nerve impulses
What’s aerobic respiration?
Our cells release energy from glucose by combining it with oxygen
Where does aerobic respiration take place?
In mitochondria
Equation of aerobic respiration?
C6H12O6 + 602 –> 6CO2 + H20
What’s anaerobic respiration?
Glucose releases energy without oxygen
Where does anaerobic respiration happen?
Cytoplasm
Yeast and anaerobic respiration?
Uses glucose to make alcohol and carbon dioxide
Can muscle cells anaerobic breathe?
Just for a small period of time, make lactose acid and no carbon dioxide
Where is oxygen obtained from?
From air (terrestrial organisms) or oxygen contained in water (aquatic organisms)
What is gas exchange?
The diffusion of carbon dioxide and oxygen in and out of system
Where does gas exchange happen?
There are surfaces for it
What are the characteristics of gas exchange surfaces?
Thin to allow gases to diffuse
Large surface ara
Good supply of oxygen
What are alveoli?
Tiny air filled sacs in the lungs where gas exchange takes place
What happens in alveoli?
Oxygen diffuses into the blood
What are inside nose?
Thin bones covered with a thin layer of cells
What do goblet cells do?
Make liquid containing water and mucus
What do cilia do?
Sweep mucus up to back of throat
Where are goblet cells and cilia located?
Along trachea and bronchi
What happens to air after it enters from mouth/nose?
Goes into trachea
What does trachea have? What’s their purpose?
Rings of cartilage around it, prevent trachea from collapsing
Where does trachea go next?
Into thorax
What happens to trachea after it reaches lungs?
Divides into two bronchi
What happens to bronchi?
Become smaller and become bronchioles
What’s ventilation?
The movement of air into and out of the lungs
