M5.1 Flashcards
Who are the researchers known for their work on peptic ulcers?
Barry Marshall and Robin Warren
What bacterium is primarily associated with peptic ulcers?
Helicobacter pylori
True or False: Peptic ulcers can be caused by stress and spicy foods.
False
What method did Marshall and Warren use to demonstrate the role of Helicobacter pylori in peptic ulcers?
They conducted a series of clinical studies and self-experimentation.
Fill in the blank: Peptic ulcers are sores that develop on the _____ lining of the stomach or the upper part of the small intestine.
mucosal
What year did Marshall and Warren receive the Nobel Prize in Physiology or Medicine?
2005
What did Von Helmont’s experiments primarily focus on?
Plant growth
True or False: Von Helmont concluded that plants gain most of their mass from the soil.
False
In Von Helmont’s famous experiment, what did he use to measure the growth of a willow tree?
He measured the mass of the soil and the mass of the tree over five years.
What substance did Von Helmont identify as a significant factor in plant growth?
Water
What did Von Helmont’s findings challenge regarding the traditional beliefs about plant nutrition?
The belief that plants derive their nutrients mainly from the soil.
What phenomenon did Spencer discover related to microwaves?
The heating effect of microwaves on food.
True or False: Microwaves cook food by exciting water molecules within the food.
True
What is the primary frequency range of microwaves used in cooking?
2.45 GHz
Fill in the blank: Microwaves are a form of _____ radiation.
electromagnetic
What invention did Spencer’s discovery lead to?
The microwave oven
What common kitchen appliance utilizes Spencer’s findings about microwaves?
Microwave oven
What year did Percy Spencer discover the cooking properties of microwaves?
1945
True or False: The primary use of microwaves today is for telecommunications.
False
What is the primary mechanism by which microwaves heat food?
By causing water molecules to vibrate, generating heat.
What was one of the significant implications of Marshall and Warren’s work on peptic ulcers?
It shifted the treatment approach from surgery to antibiotics.
What did Von Helmont’s work contribute to the field of botany?
It laid the groundwork for understanding plant physiology.
What do peptic ulcers primarily affect in the human body?
The stomach and the duodenum.
Fill in the blank: Spencer’s discovery was made while he was working on _____ technology.
radar
