Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 23976
TLS Online TPP Program

#Question id: 20311

Which of the following is INCORRECT about Aldosterone;

#Unit 7. System Physiology – Animal
  1. Aldosterone exerts nearly 90 percent of the mineralocorticoid activity of the adrenocortical secretions, but cortisol, the major glucocorticoid secreted by the adrenal cortex.
  2. Aldosterone’s mineralocorticoid activity is about 3000 times greater than that of cortisol, but the plasma concentration of cortisol is nearly 2000 times that of aldosterone.
  3. Aldosterone increases reabsorption of potassium and simultaneously increases secretion of sodium by the renal tubular epithelial cells, especially in the principal cells of the collecting tubule
  4. A high concentration of aldosterone in the plasma can transiently decrease the sodium loss into the urine to as little as a few milliequivalents a day
More Questions
TLS Online TPP Program

#Question id: 2556

#Unit 2. Cellular Organization

Which of the following processes generates a proton-motive force in mitochondria?
TLS Online TPP Program

#Question id: 2557

#Unit 2. Cellular Organization

In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve?
TLS Online TPP Program

#Question id: 2558

#Unit 2. Cellular Organization

A young dog has never had much energy. He is brought to a veterinarian for help, and she decides to conduct several diagnostic tests. She discovers that the dog's mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of the dog's condition?
TLS Online TPP Program

#Question id: 2559

#Unit 2. Cellular Organization

Even though plants cells carry out photosynthesis, they still use their mitochondria for oxidation of pyruvate. Under what conditions will plant cell mitochondria be active in this process?
TLS Online TPP Program

#Question id: 2560

#Unit 2. Cellular Organization

In a liver cell detoxifying alcohol and some other poisons, the enzymes of the peroxisome remove hydrogen from these molecules and ________.
TLS Online TPP Program

#Question id: 2561

#Unit 2. Cellular Organization

Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. Which cellular organelle is most likely defective in this condition?