Five Dialysis Bags Constructed of Membrane, Which Is Permeable to Water

question 31

Multiple Choice

Five dialysis bags constructed of membrane, which is permeable to water and impermeable to sucrose, were filled with various concentrations of sucrose and then placed in separate beakers containing an initial concentration of 0.6 M sucrose solution. At 10-minute intervals, the bags were massed (weighed) and the percentage change in mass of each bag was graphed.
-A patient was involved in a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, distilled water-equal to the volume of blood lost-is added to the blood directly via one of his veins. What will be the most probable result of this transfusion?

• A) It will have no unfavorable effect as long as the water is free of viruses and bacteria.
• B) The patient's red blood cells will shrivel up because the blood has become hypotonic compared to the cells.
• C) The patient's red blood cells will swell and possibly burst because the blood has become hypotonic compared to the cells.
• D) The patient's red blood cells will shrivel up because the blood has become hypertonic compared to the cells.
• E) The patient's red blood cells will burst because the blood has become hypertonic compared to the cells.

---

Definitions:

Semen

A fluid containing spermatozoa and secretions from the male reproductive system, discharged during ejaculation.

Urethral Opening

In females, the opening in the urethra, through which urine is expelled. In males, the opening in the urethra, through which semen is ejaculated and urine is excreted.

Pelvic Cavity

The space within the pelvis that contains reproductive organs, the urinary bladder, and the rectum.

Penis Root

The base part of the penis where it attaches to the pelvic bones.