QUIZ HOMEOSTASIS, BODY FLUIDS, MEMBRANE TRANSPORT

Which one of the following functions is performed by K+/Na+ pump?

• Allows osmosis of water directly

• Creates negative potential inside cell

• Increases the size of cells

• Transports 2 K+ outside the cell

• Transfers 3 Na+ inside the cell

Two liters of 0.9% NaCl is administered to a 14-year-old boy with moderate isotonic dehydration. What is the expected change in Intracellular fluid volume after this treatment?

• Decreased by 0.5 liters

• Decrease by 2 liters

• Increase by 0.5 liters

• Remains unchanged

• Increase by 2 liters

In a control system, which one of the following variables obeys the command and performs the required function?

• Center

• Effector

• Integrating center

• Receptor

• Stimulus

By which one of the following transport mechanisms, macromolecules are transported into the cell?

• Co-transport

• Exocytosis

• Facilitated diffusion

• Filtration

• Pinocytosis

Which of the following is the most important body fluid that can be regulated directly through different regulatory mechanisms?

• Interstitial

• Intracellular

• Lymph

• Plasma

• Trancellular

Red blood cells from a healthy adult male were placed in different solutions and observations were made after 10 minutes. In which of the following solutions cells have lysed completely?

• 0.3%

• 0.7%

• 0.9%

• 1.0%

• 1.2%

Which one of the following features is shared between simple and facilitated diffusion?

• Consume energy

• Follow concentration gradient

• Require Adenosine triphosphate

• Show saturation kinetics

• Use specific carrier protein

Movement of glucose molecules through the luminal membrane into the intestinal cells is an example of which of the following transport mechanisms?

• Co-transport with Na+

• Counter transport with Ca2+

• Endocytosis

• Facilitated diffusion

• Simple diffusion

A 22-year-old male weighs 50 kg. What would be the total amount of water present in his body?

• 15 liters

• 20 liters

• 25 liters

• 30 liters

• 35 liters

Which one of the following factors is inversely proportional to the rate of diffusion across the cell membrane?

• Concentration gradient

• Molecular size of particle

• Permeability of membrane

• Surface area of membrane

• Temperature of solution