Biology Questions and Answers
the immune system with antibodies and
leukocytes inactivatingforeign agents. and destroying
Other defense mechanismsairway are the sneeze and the cough. of the (^)
They help the elimination of solid and
semifluid particlesresiduals (sputum) an like pathologicd accidentally (^)
aspired objects.
- Which are the respiratory
muscles in mammals?
In mammals the muscles that
participatethe diaphragm and the intercostal in the breathing process are
muscles. In respiratory insufficiency
other muscles can hethe muscles of the shoulders, neck,lp the respiration,
thorax and abdomen.
- How are inhalation and
expiration carried out?
The diaphragm and the intercostal(exclusive o muscles can contractf mammals) (^)
or relax varying the volume of the
thorax (the compartmelungs are located). The changing of thent where the (^)
thorax volume forces inhalation or
expiration.
When the thorax volume is increased an
internal patmospheric pressure lower than ressure (external) isthe (^)
created and gases naturally enter the
lungs. Wlowered the internal phen the thorax volume isressure rises (^)
above the external pressure and the air
is expelled from the lungs.
- What is the difference
between arterial and venous
blood?
Arterial bcarbon dioxide-poor blood that irrigateslood is the oxygen-rich and (^)
the tissues. Vepoor and carbon dioxide-rich nous blood is the oxygen-blood
collected from the tissues.
- What is hematosis? In
humans where does
hematosis occur?
Hematosis is the oxygenation of the
blood. Venous bafter hematosis is transfolood (oxygen-poor)rmed into (^)
arterial blood (oxygen-rich).
In humans hematosislungs. takes place in the
- What are the blood vessels
that carry venous blood to the
heart? What is the blood
vessel that collects arterial
blood from the heart?
The blood vessels that debouch in theheart carrying venous blood are the
inferior and the superior vena cava. The
blood vessel that carries artfrom the heart is the aorta.erial blood - What is the gas exchange
unit of the mammalian lungs?
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