BIOL 2113 QUESTIONS AND ASWERS LATEST UPDATE
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6 structural levels of organization
chemical, cell, tissue, organ, organ system, organism
What is homeostasis and why is it important?
regulation and maintenance of constant internal conditions in an organism.
Because vital chemical reactions can take place only within a limited range of conditions
Describe serous membranes
-Membranes found in closed ventral body cavities
-Simple squamous epithelium on a layer of areolar connective tissue
-Viscera covers the organ
-Parietal covers the outside body wall
What are elements?
An element is a substance that cannot be broken down to other substances by chemical
reactions.
What are atoms?
Building blocks of matter
3 types of chemical bonds
ionic, covalent, hydrogen
ionic bond
the attraction between oppositely charged ions
covalent bond
A chemical bond formed when two atoms share electrons
hydrogen bond
weak attraction between a hydrogen atom and another atom
what chemical properties of water make it vital to life
thermal properties, ability to act as a universal solvent, cohesion and adhesion
Describe the pH scale
0-6=acid
7=neutral
8-14=base
4 types of biological molecules
1. Carbohydrates
2. Lipids
3. Proteins
4. Nucleic Acids
Carbohydrates
Broken down to glucose to provide energy.
Lipids
Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon,
hydrogen, and oxygen.
proteins
100% CORRECT A+ GRADED. Buy Quality Materials!
6 structural levels of organization
chemical, cell, tissue, organ, organ system, organism
What is homeostasis and why is it important?
regulation and maintenance of constant internal conditions in an organism.
Because vital chemical reactions can take place only within a limited range of conditions
Describe serous membranes
-Membranes found in closed ventral body cavities
-Simple squamous epithelium on a layer of areolar connective tissue
-Viscera covers the organ
-Parietal covers the outside body wall
What are elements?
An element is a substance that cannot be broken down to other substances by chemical
reactions.
What are atoms?
Building blocks of matter
3 types of chemical bonds
ionic, covalent, hydrogen
ionic bond
the attraction between oppositely charged ions
covalent bond
A chemical bond formed when two atoms share electrons
hydrogen bond
weak attraction between a hydrogen atom and another atom
what chemical properties of water make it vital to life
thermal properties, ability to act as a universal solvent, cohesion and adhesion
Describe the pH scale
0-6=acid
7=neutral
8-14=base
4 types of biological molecules
1. Carbohydrates
2. Lipids
3. Proteins
4. Nucleic Acids
Carbohydrates
Broken down to glucose to provide energy.
Lipids
Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon,
hydrogen, and oxygen.
proteins
