1. Materia: Biology Senior 3
Profesora: Ma. Magdalena Ravagnan
Contenido nodal: Maintenance of the organisms
TERCER TRIMESTRE
Fecha de presentación: Tuesday February 19th
A- Respiration
1) Define the term respiration.
2) During exercise muscles need to obtain energy even when there is no supply of oxygen.
a- Name the type of respiration in muscle cells during exercise. : ………………………………………..
b- Write the formula for the respiration named above, in words.
…………………………………………………………………………………………..
c. During respiration in yeast, other products are produced. Write the formula and underline the products.
3 ) Why do you think your breathing rate and heart rate stay high for some time after completing a spell of vigorous
exercise?
B- Gas exchange
a- Explain the role of the following structures during exhalation
Diaphragm: ………………………………………………………
Intercostal muscles: ……………………………………………….
Volume of rib cage: …………………………………………………….
Pressure in lungs: ……………………………………………………………
b- i- Name the gas exchange surface in humans.
ii- Explain what causes the oxygen and carbon dioxide diffuse for gas exchange.

2. C- Excretion and kidneys
a- Explain the term reabsorption.
b- State one advantage and one disadvantage of dialysis.