Resp. anatomy
What is the color of arterial blood and why?
Bright red because the hemoglobin are highly saturated.
Local bronchoconstriction to redirect open oxygen to open vessels.
Which layer of the GI tract touches the food?
mucosa
What is motility?
contractions that mix and propel the food forward.
Where are the central chemoreceptors located?
Medulla oblongota
T/F: deoxygenated hemoglobin has a higher affinity for O2 which will increase O2 loading onto the Hb.
F: it has a higher affinity for CO2/H+ which will increase their loading.
greater omentum
What do carbohydrates get digested into?
monosaccharides
What is the partial pressure of oxygen in venous blood?
40 mmHg
How does increasing temperature affect the loading and unloading of O2?
It will cause hemoglobin to have a lower affinity for O2 and increase its unloading.
Which salivary gland is affected by the mumps virus?
the parotid
What controls the GI tract through "short reflexes"?
Enteric nervous system
What problem will hypoventilation cause?
respiratory acidosis
How does the body respond to high hydrogen levels?
The peripheral chemoreceptor firing rate will increase causing increased ventilation.
What is the name of the sphincter between the stomach and duodenum?
pyloric sphincter
T/F: the body can change the rate of peristalsis is response to more or less food.
F: NO CHANGE IN RATE, the force of contraction will change.
What does carbon dioxide dissolve into?
Why is carbon monoxide poisonous?
It takes up two spots on hemoglobin and it stops O2 from being able to unload.
What is the deepest nerve plexus of the GI tract and what is its function?
submucosal nerve plexus and regulated secretions.
What is receptive relaxation?
it allows the stomach to prepare to receive food. Without food it will have a small volume and once food is swallowed it stretches out.