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TLS Online TPP Program

#Question id: 13125

Which of the following statements is consistent with the principle of competitive exclusion? 

#Unit 10. Ecological Principles
  1. Bird species generally do not compete for nesting sites.
  2. The density of one competing species will have a positive impact on the population growth of the other competing species.
  3. Two species with the same fundamental niche will exclude other competing species.
  4. Even a slight reproductive advantage will eventually lead to the elimination of the less well adapted of two competing species
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TLS Online TPP Program

#Question id: 12698

#Unit 7. System Physiology – Animal

The following test results were obtained: urine flow rate = 2.0 ml/min; urine inulin concentration = 60 mg/ml; plasma inulin concentration = 2 mg/ml; urine potassium concentration = 20 μmol/ml; plasma potassium concentration = 4.0 μmol/ml; urine osmolarity = 150 mOsm/L; and plasma osmolarity = 300 mOsm/L. What is the net potassium reabsorption rate?
TLS Online TPP Program

#Question id: 12699

#Unit 7. System Physiology – Animal

The following test results were obtained: urine flow rate = 2.0 ml/min; urine inulin concentration = 60 mg/ml; plasma inulin concentration = 2 mg/ml; urine potassium concentration = 20 μmol/ml; plasma potassium concentration = 4.0 μmol/ml; urine osmolarity = 150 mOsm/L; and plasma osmolarity = 300 mOsm/L. What is the free water clearance rate?
TLS Online TPP Program

#Question id: 12700

#Unit 7. System Physiology – Animal

A young man is found comatose, having taking an unknown number of sleeping pills an unknown time before. An arterial blood sample yields the following values: pH = 7.02, HCO3− = 14 mEq/L, and PCO2 = 68 mm Hg. This patient’s acid–base status is most accurately described as
TLS Online TPP Program

#Question id: 12701

#Unit 7. System Physiology – Animal

In chronic respiratory acidosis with partial renal compensation, you would expect to find the following changes, compared to normal:___ urinary excretion of NH4+; ______ plasma HCO3− concentration; and _____ urine pH.
TLS Online TPP Program

#Question id: 12949

#Unit 7. System Physiology – Animal

At which renal tubular sites would the concentration of creatinine be expected to be highest in a normally hydrated person?
TLS Online TPP Program

#Question id: 12950

#Unit 7. System Physiology – Animal

Increases in both renal blood flow and GFR are caused by which of the following?