What Happens When a Venomous Snake Bites Itself?

TL;DR

Snake venom is highly toxic to other animals but does not harm the snakes themselves due to a variety of strategies they have developed, such as altering their receptor proteins and producing natural inhibitors to neutralize the venom's effects.

Transcript

Thanks to Brilliant for supporting this episode of SciShow. Go to Brilliant.org/SciShow to learn how to take your STEM skills to the next level. [♪ INTRO] Snake venoms are some of the world’s deadliest substances. So snakes have to be super careful with them. I mean, if you have giant muscles, you don't want to punch yourself in the face. And obvi... Read More

Key Insights

• 🐍 Snake venoms contain toxic peptides and proteins that target shared elements in vertebrates and invertebrates.
• 🐍 Some venomous snakes alter their receptors to repel or block their own toxins.
• 🐍 Snakes have evolved built-in antivenoms that neutralize the most dangerous components of their venom.
• 🦻 Natural inhibitors found in snake blood could aid in developing improved antivenoms.
• 🐍 Not all snakes are immune to their own venom, and toxin variation among individuals can result in fatal bites.
• 🐍 Snake venom defense mechanisms can prevent personal tragedy for most snakes.
• 🥺 Better understanding of snake venom defense strategies may lead to more effective and accessible antivenoms.

Questions & Answers

Q: Why are snake venoms dangerous to humans, despite humans not being the intended targets?

Snake venom toxins target and disrupt key elements of our biological systems, even though we are not the biological buildings they are meant to break into.

Q: How do some snakes modify their receptors to protect themselves from their own venom?

Some species of snakes have changed the polarity of their receptors, repelling positively charged toxins. Other snakes can tack sugars onto their nerve receptors, physically blocking toxins from reaching their target.

Q: Why don't snakes modify the parts of their bodies that venom attacks?

Modifying crucial biological structures could have life-threatening consequences, so snakes have evolved built-in antivenoms, proteins that inhibit their own venom's toxic effects.

Q: How can snakes' natural inhibitors help in the development of antivenoms?

Natural inhibitors in snakes' blood, such as phospholipase inhibitors, show promise in developing better antivenoms that are more accessible, cover a wider range of snake species, and do not require cold storage.

Summary & Key Takeaways

• Snake venom contains toxic peptides and proteins that cause various harmful effects, such as paralysis, uncontrolled bleeding, and cell death.

• Snakes have developed strategies to protect themselves from their own venom, including modifying their receptor proteins, adding sugars to block toxin receptors, and producing natural inhibitors to neutralize venom.

• These insights into snake venom defense mechanisms could potentially aid in the development of better antivenoms.