PHYSIO B PAST EXAM MCQ Flashcards
The term renal auto regulation refers in part to the fact that?
Renal blood flow is relatively constant over a wide range of systemic arterial pressures.
If the end diastolic volume is 135 ml, the end systolic volume is 65 ml, and the avg HR is 72 bpm:
The cardiac output is about 5 L/min.
Hemodynamics:?
During physical activity both the amount of blood flow and the relative distribution of the flow in the different parts of the body change.
Under normal conditions, saliva contains high concentration of which of the following ions?
Potassium
In relation to the autonomic control of the heart?
Stimulation of the left stellate ganglion accelerates heart rate.
Beside water, which of the following substances have the highest concentration in bile?
Bile salts.
A hyperkalemic patient is given an infusion of glucose and insulin. The actions of insulting include?
Enhancing potassium entry into cells.
What is the most common type of motility associated with the descending colon?
Mass movements.
Which of the following is the stimulus for increases secretion of atrial natriuretic peptide’
Decrease venous blood volume and atrial pressure.
According to liver body supply, which of the following statements is correct?
Portal vein delivers 75% of blood supply and hepatic arteries in the remaining 25%.
The brain bridge reflex:
Effects opposite to those of the carotid sinus reflex.
The liver is responsible for which of the following metabolic functions?
All responded are correct: oxidation of fatty acids, deamination of AAs, conversion of galactose and fructose to glucose.
Sodium is actively reabsorbed from the renal tubule in which of the following nephron segment?
Proximal tubule.
Absorption of glucose by enterocytes?
Relies on facilitated transport at the apical membrane.
Great vessels:
The elasticity of the arteries is the reason for the pulsatile flow in the arteries.
Which of the following steps of the hemoglobin degradation process takes place in the liver?
Bilirubin conjugation with glucoronic acid or sulfate
During acute hypoglycemia, insulin secretion is inhibited by low glucose and?
GLP-1 signaling through GLP-1 receptors
What signal causes the heart to secrete atrial natriuretic acid?
Increased plasmatic sodium levels
The amount of water is excreted in stool is about?
100ml
Which of the following plasma proteins are not synthesized in the liver?
Gamma Globulin
ACTH deficiency would greatly diminish:?
The secretion of cortisol
Which percentage of bile salts gets reabsorbed into the blood from the intestine with the enterohepatic circulation?
80%
Which of this following elements is a characteristic of an obstructive jaundice?
Plasmatic increase of conjugated Bilirubin
Myogenic reflex?
This reflex is important in the auto regulation of blood flow and small arteries and arterioles.
Select the false statement. In relation to the properties of the vascular system:?
An increase in the longitudinal pressure gradient along a peripheral vascular stimulates nitric oxide release from the smallest that muscle and causes vasodilation.
Vitamin B12 is absorbed mainly in there?
Ileum
In physiological conditions, which of the following substances is reabsorbed to the highest proportion at the level of that tubular system?
Glucose
In relation to control the circulation?
The function of the myogenic mechanism is to keep constant blood pressure and peripheral circulatory districts during postural changes.
The gastric juice has all the following characteristic except?
Antibacterial action is produced by mucous content.
EC-Coupling?
In the heart ryr and dhp have link
Regulation of blood flow ?
Short term regulation of blood flow occurs via vasodilation and constriction.
Most of the water and electrolytes absorbed across the walls of the GI tract is absorbed in this region:?
Large intestine.
Renin is releases by the kidney in response to?
Decreased blood pressure
Gastric secretion is inhibited by all of the following except:?
Presence of excess protein digestive products in the stomach.
Urea has a higher concentration in the fluid that leaves the proximal tube than in the blood plasma bc:?
Urea diffuses back into the proximal tubule bc of high urea concentration in the renal medulla.
The fick principle:?
Derives from the law of conservation of energy.
Which of the following stimuli regulates bile secretion from the liver?
Cholecystokinin secretion
The appearance of large amounts of ammonium ion in the urine is characteristic of the renal response to?
Alkalosis.
After ideal resection, a patient will have excess fat in feces for the following reason?
Miscelles do not form in the intestinal lumen.
Slow electrical waves are associated with?
The enteric nervous system.
Which signal causes the heart to release the peptide niatr..?
Increased blood pressure.
Staircase effect?
Entropy increase due to accumulation of Ca in the cell following adrenergic stimuli.
According to fricks principle?
You can calculate VO2 if you have delta P and CO
In case of CO2 at muscular level:…
Hypermia active
Surfactant act…select false?
More on larger alveoli
Hemoglobin?
High O2 affinity at high pH, low O2 affinity with 2,3 BPG
