The following sentence is inaccurate, but it can be made accurate by exchanging two words within it (forms of articles may need to change to accommodate word switches):
The slow block to polyspermy is a physical envelope mediated by Ca2+ ions that cause cortical granules to fuse with the egg cell membrane, releasing compounds that cause the vitelline envelope to turn into a hardened fertilization reaction.
blank1 - Word Answer
blank2 - Word Answer
The block to polyspermy is a slow physical envelope mediated by Ca2+ ions that cause cortical granules to fuse with the egg cell membrane, releasing compounds that cause the vitelline envelope to turn into a hardened fertilization reaction.
blank1: Slow -> Physical
blank2: Physical -> Slow
blank1 - The
blank2 - Block
To make the sentence accurate, we need to identify the two words that need to be exchanged. Here's a breakdown of the sentence to help us identify those words:
"The slow block to polyspermy is a physical envelope mediated by Ca2+ ions that cause cortical granules to fuse with the egg cell membrane, releasing compounds that cause the vitelline envelope to turn into a hardened fertilization reaction."
To figure out the correct exchange, let's look at the context and meaning of the sentence:
"The slow block to polyspermy" suggests a mechanism that prevents multiple sperm from fertilizing the egg.
"Physical envelope mediated by Ca2+ ions" indicates that there is a physical barrier formed due to the influence of calcium ions.
"Cortical granules fuse with the egg cell membrane, releasing compounds" implies that there is a fusion process occurring between certain granules and the egg cell membrane, resulting in the release of specific compounds.
"Cause the vitelline envelope to turn into a hardened fertilization reaction" indicates that the fusion process leads to changes in the vitelline envelope, turning it into a hardened structure involved in fertilization.
Now let's identify the two words that need to be exchanged:
Blank 1: "blank1 - Word Answer" refers to the first word that needs to be exchanged.
Blank 2: "blank2 - Word Answer" refers to the second word that needs to be exchanged.
To determine which words should be exchanged, we can consider the context and logical flow of the sentence. However, without any specific direction or clarification, it's difficult to accurately determine which words need to be exchanged. Could you please provide more information or context to help identify the words that need to be switched?