Physiology Flashcards
The movement of air into the airways and lungs due to respiration results in response to
a. positive pressure gradient from the lung interior to the
atmosphere
b. Reduced intrapleural pressure
c. A negative pressure gradient from the atmosphere to
the lung interior
d. Stimulation from the apneustic center of the pons
reduced intrapleural pressue
Pernicious anemia may be due to damage to the
A proximal ileum
B distal jejunum
C gastric mucosa
Gastric mucosa
Individuals who have significant amounts of the fetal form of hemoglobin in adulthood have:
Beta thallasemia
Iron requires ___ to be absorbed
Vitamin C
During isovulumutric relaxation the:
a semilunar valve is closed
b av valves are open
c. av valves are closed
AV valves are closed
Thyroid gland releases
calcitonin
What wraps around the actin filament binding site?
a. troponin
b. tropomyosin
c. myosin
d. calcium
Myosin (head)
In normal breathing, which occurs on inspiration
tidal volume
The amount of air moving through the lungs from maximal exhalation to maximal inhalation is the:
IRV+ERV+TV
The amount of air moving through the lungs at rest is the: tidal volume
Tidal volume
A potent vasoconstrictor, angiotensin II has a significant impact on blood pressure following its formation in the
Lungs by ACE
Angiotensin II exerts as a powerful effect on blood pressure, causing increased pressure through ___ and retention of___
Vasoconstriction; salt, water
The neural communication between the cerebrum and the cerebellum goes through the:
Pons
Can cortisol be responsible for the synthesis of fatty acids:
Yes
Which of the following structures is not part of the nephron ?
collecting duct
Which of the flowing gastric cells secrete HCL
Parietal
Angiotensinogen is converted to angiotensin I by
Renin
The process of inspiration requires energy expenditure which is mainly due to the need to overcome:
A tissue elasticity
Surface tension in the alveoli
Tissue viscosity
Airway resistance to flow
tissue elasticity
What blood test finding best describes respiratory acidosis?
decreased pH
Which Gastric cells produce pepsinogen?
chief cells
Compensatory effect of respiratory acidosis is:
Increased serum bicarbonate levels
Increased rate and depth of respiration
Increased serum carbonic acid levels
Decrease in the rate and depth of respiration
Increased rate and depth of respiration
Surfactant, which greatly reduces the surface tension is secreted by what cells:
Alveolar Type II cells
The QRS complex results from:
Atrial contraction
Atrial depolarization
Ventricular repolarization
Ventricular repolarization
The head of the pancreas secretes
(digestive) enzymes (bcarbonate ions, pancreatic juice)
“Exocrine pancreas”
ADH is primarily found at:
Distal convoluted tubule
Collecting duct
Both the distal convoluted tubule and collecting duct
Collecting duct
