Lecture 1 Flashcards
The smallest unit of life
The cell
The functional activities of a cell depend on
The specific structural properties of the cell.
All organisms composed of …
One or more cells.
Serves as the building block for a multicellular organism
The cell
All new cells arise from
Previously existing cells.
The meaning of significance of the continuity of life
It means that the cells of all organisms are fundamentally similar in structure and function.
The zygote is
The single cell formed from the fusion of the ovum and sperm.
The human body ultimately comprise of
About 75-100 trillion cells.
Grouped together to form tissues
Cells
Grouped together to made organs
Tissues
An example of a system in the human body is
The digestive system.
The simplest type of cells
Prokaryotic cells.
The complex type of cells
Eukaryotic cells.
The type of chromosome the prokaryotic cells have
A single circular chromosome.
The average size of a human cell
Ranges from 10-30 micrometers in diameter.
The largest cell in the human body
The female ovum.
The smallest cell in the human body
The red blood cell (RBC).
The five main substances that make up a cell
Water, ions, proteins, lipids, and carbohydrates.
Percentage of water on a cell’s mass
70-85%.
The role of proteins in the cell
They serve as structural components and enzymes for chemical reactions.
Phospholipids and cholesterol primarily used for in cells
Forming cell membranes.
The function of glycogen
A stored form of carbohydrates in cells.
The function of glycogen
A stored form of carbohydrates in cells.
A type of connective cell
Blood cells.
Example of Conductive cells
Nerve cells
