Nise Flashcards
What is a tissue?
Any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products
Explain what is meant by the term ‘organ system’?
An organ system is a group of organs that work together to perform one or more functions. Each does a particular job in the body, and is made up of certain tissues.
Why can enzymes be described as biological catalysts?
Enzymes are proteins functioning as catalysts that speed up reactions by lowering the activation energy
Why do enzymes only usually catalyst one reaction?
Enzymes are highly selective catalysts, meaning that each enzyme only speeds up a specific reaction.
What does it mean when an enzyme has been ‘denatured’
Destroy the characteristic properties of (a protein or other biological macro molecule) by heat, acidity, or other effect which disrupts its molecular conformation.
Describe how you could investigate the effect of pH on the rate of amylase activity?
a
List the three places where amylase is made in the human body.
The pancreas and salivary gland make amylase. The gall bladders makes it as well.
What is the role of lipases?
Lipase is an enzyme that breaks down dietary fats into smaller molecules called fatty acids and glycerol.
Where is bile stored?
The Gall Bladder
Name the solution that you would use to test for the presence of lipids in a food sample
a
Name the tubes that split off the trachea.
Bronchi
Explain the role of that alveoli play in gas exchange
Oxygenates the blood cells
Explain why the circulatory system in humans is described as a ‘double circulatory system’?
Left and right side of the heart has different roles.
Why does the heart have halves?
s
Name the four chambers of the heart.
Left ventricle, Right ventricle, left atrium right atrium
