Physiology I Exam III Flashcards
Mean cap pressure…yada yada yada. Total inward force?
28.0 mmHg
Hypertonic fluid is added to the extracellular fluid, what is the effect after osmotic equilibrium?
Decrease in intracellular and increase in extracellular
GFR is determined by the by the net filtration pressure and the glomerular capillary filtration coefficient. Which of the following factors has greatest effect on increasing GFR?
Glomerular hydrostatic pressure
Which of the following variable DOES NOT determine glomerular hydrostatic pressure?
Bowman’s capsule colloid osmotic pressure
Many actively transported solutes demonstrate a transport maximum. Which does NOT?
Sodium in proximal tubule
The thin descending loop of Henle is highly permeable to
Water
1,2,1 transporter found
Thick ascending limb of Henle
Where is macula densa
DCT
Aldosterone is an important regulator …. main target
Principal cells
T/F Angiotensin most powerful sodium tetainer
True
Where ADH levels are high, the lowest osmolality in the renal tubule would be found
DCT
ADH secreted where
Post. Pit
Forces that determine movement are Starling forces. Which move fluid inward at the arterial end of the capillary?
Plasma colloid osmotic pressure
Small connecting nerves
Hering nerves
T/F Because of Bainbridge reflex, an increase in atrial pressure causes stronger contraction but decreases heart rate
FALSE
NOT result in vasoconstriction
Nitric oxide
Release of ANP as result of atrial stretch would have effect
Increased GFR and decreased sodium ion reabsorption
Characteristics of primary HTN would NOT include
Activation of renal-pressure natriuesis mechanism
T/F The near infinite feedback gain principle is defined as the degree of pressure shift of the renal output curve for water and salt
False
Built in mechanism that allows heart to pump amt of blood RA
Starling’s law
Factors that cause a hypoeffective heart would NOT include
Hypertrophy of the heart
Which of the following statements is/are correct.
I. During systole
II. During diastole
NEITHER are correct
Primary controller of coronary artery blood flow is
Local muscle metabolism
Which statement is correct:
I. Acute heart failure is likely to cause pulmonary edema
Only I.
Not systemic, not enough time
T/F The second heart sound results from sudden closure of AV valves
FALSE
NOT cause of neurogenic shock
Hemorrhage
Approx how much calcium reabsorbed by kidney
Almost all of it
An increase in this will decrease glomerular hydrostatic pressure?
Afferent arteriorlar pressure
A decrease in sodium chloride conc causes macula densa to
Decrease resistance to blood in the afferent arterioles
During depolarization, threshold is the voltage at which
The sodium ion current exceeds the potassium ion current
In Stokes Adams, a rapid discharge of impulses and after variable period of time ends suddenly
False
Van’t Hoff’s law allow one to calculate potential osmotic pressure of a solution. To correct for deviation, also use
Osmotic coefficient
Hering-Breuer is triggered to respond to excessive stretching during excessive inspiration. T/F
True
Which center is responsible for est ramp signal
Dorsal resp group
A factor that affects the diffusion rate of a gas and that is characteristic of the gas itself is
Solubility of the gas
Which of the following decreases H+ secretion and bicarbonate reabsorption?
Decrease in angiotensin II
T/F Kidneys most powerful of 3 lines of defense
True
Destruction 50-80% alveolar walls is
Emphysema
Humidification of air in alveoli
Decreases the partial pressures of each of the other gasses
% of CO2 carried in blood as bicarbonate?
70%
“Switch-off” point of inspiratory ramp signal
Pneumotaxic
Unlike CO2, O2 acts on this to control rate of respiration
Carotid body
Alveolar collapse condition
Atelectasis
Lack of surfactant, esp in newborn
Atelectasis
Physiological dead space calculation is
bohr’s
Va/Q is zero under which conditions
Va = 0
Perfusion > 0
If arterial blood carries 19.4 and returning 14.4 the utilization coefficient is
25%
The rate and depth of breathing is mainly controlled by
Pneumotaxic center
T/F Kidneys produce compensatory response to resp acidosis
TRUE
T/F Tubular fluid becomes more dilute as it ascend the ascending loop of Henle as long as ADH is present
FALSE
Vital capacity of lung is calculated by summing all EXCEPT
Functional residual capacity
