Question

intracellular fluid (collectively, the nucleoplasm and the cytosol) is a solution containing small amounts of gases (oxygen and carbon dioxide), nutrients, and salts. (1.) in water. so too is extracellular fluid, or interstitial fluid, the fluid that continuously bathes the exterior of our cells. you can think of (2.) fluid as a rich, nutritious, and rather unusual “soup.” it contains thousands of ingredients, including nutrients (amino acids, sugars, fatty acids, vitamins), regulatory substances such as (3.) and neurotransmitters, salts, and waste products. to remain healthy, each cell must extract from this soup the exact amounts of the substances it needs at specific times and reject the rest. the plasma membrane is a selectively permeable barrier. selective permeability means that a (4.) allows some substances to pass through it while excluding others. thus, it allows nutrients to enter the cell but keeps many undesirable or unnecessary substances out. at the same time, valuable cell proteins and other substances are kept within the cell, and (5.) are allowed to pass out of it.

1. dissolved 2. interstitial 3. hormones 4. barrier 5. wastes

1. wastes 2. dissolved 3. interstitial 4. hormones 5. barrier

1. interstitial 2. hormones 3. barrier 4. wastes 5. dissolved

1. hormones 2. barrier 3. wastes 4. dissolved 5. interstitial

1. barrier 2. wastes 3. dissolved 4. interstitial 5. hormones

Explanation:

1. Substances like gases, nutrients and salts are dissolved in water in intracellular and extracellular fluids. So (1) is "dissolved".
2. The fluid that bathes the exterior of cells is interstitial fluid, so (2) is "interstitial".
3. Regulatory substances in extracellular fluid include hormones and neurotransmitters, so (3) is "hormones".
4. The plasma - membrane is a barrier that shows selective permeability, so (4) is "barrier".
5. Cells allow waste products to pass out of them, so (5) is "wastes".

Answer:

1. dissolved 2. interstitial 3. hormones 4. barrier 5. wastes