This compound is called latrotoxin.
Yes, the black and white striped spider, also known as the zebra spider, is not poisonous to humans.
No, they are not poisonous to humans. Their bite is non-lethal, but it will cause some pain.
Black Widow
Yes, the black spider with an orange dot on its back is likely a black widow spider, which is venomous.
yes!
No. The Writing spider, Argiope aurantia Lucas, is just about as harmless as you can get. Their venom is only potent enough to kill an insect.
The Black Widow Spider
The spider which you are describing, being black and about the size of the palm of your hand in Ohio is likely a wolf spider. They are not aggressive but will bite if provoked. While not lethal to humans, a wolf spider bite will require medical attention as they are poisonous.
The spider you are describing is likely the yellow sac spider. They are commonly found in North America and are known for their distinctive yellow markings on their bodies and legs. Yellow sac spiders are often found indoors and are not considered to be aggressive towards humans.
No. Lynx Spiders are not poisonous. For instance, birds can eat them without any problem. Humans sometimes cook and eat tarantulas. Lynx spiders, and most other spiders, are venomous. If a lynx spider bites you it will inject some venom. This venom is toxic to humans but not so toxic as to make a lynx spider bite a medical problem.
It's probably a black widow and yes very poisonous.
all spiders are venomous. but there are only two spiders in north America that have venom that can seriously harm a human, the black widow, and brown recluse, aka violin spider, and fiddleback. the green lynx spider is not venomous to humans though, but it does hurt to get bit!