Toxicology

LD₅₀ measures

• the amount that will make you sick half the time

• the lethal dose for 50% of a test population

• the quantity of toxin needed to infect 50% of your cells

• the amount that will kill you half the time

Cyanide, heroin, and nicotine are concidered extreamly toxic, meaning their LD₅₀ is in this range.

• Less than 5 mg/kg of body weight

• 5 to 50 mg/kg of body weight

• 50 to 500 mg/kg of body weight

• 500 to 1000 mg/kg of body weight

LC₅₀ is used primarily for

• medicine

• poisons

• air pollution

• aquatic systems

I eat a mushroom and I die. What is the type of toxicity?

• Acute

• Chronic

• A cute

I am exposed to radiation as a child. Ten years later I die from it. What is the type of toxicity?

• Acute

• Chronic

• A cute

Tags

NGSS.HS-PS4-4

I ingest lead with every glass of water I drink. What is the type of toxicity?

• Acute

• Chronic

• A cute

Several chemicals in sub-toxic amounts when mixed together become toxic.

• Threshold of Toxicity

• Bioaccumulation

• Toxic Synergy

• Biomagnification

Something, like PCBs, that causes cancer is called a

• mutagen

• pathogen

• carcinogen

• teratogen

Something, like thalidomide, that causes malformed embryos, is called a

• mutagen

• pathogen

• carcinogen

• teratogen

What is not true about heavy metals?

• They can leach into groundwater

• They can be found in e-waste

• They can cause mutations to your DNA

• They are potent neurotoxins

Tags

NGSS.HS-LS3-2