Back to notes
Give an example of an organism with organ system level organization.
Press to flip
An example of an organism with organ system level organization is a human, which has systems like the digestive system and respiratory system composed of multiple organs.
Explain the concept of 'division of labor' in multicellular organisms.
In multicellular organisms, division of labor refers to the specialization of cells into tissues, organs, and organ systems for efficient functioning, such as different organs handling respiration, digestion, and excretion.
Who coined the term 'protoplasm' and what does it refer to?
Purkinje coined the term 'protoplasm', which refers to the living substance within a cell, including the cytoplasm, nucleus, and other organelles.
What are the key elements of Cell Theory?
Key elements of Cell Theory include: cells are the fundamental units of structure and function in organisms; all living organisms are made of cells; cells arise from pre-existing cells; and there is a general similarity in cell structure and function.
What is the significance of Rudolph Virchow's contribution to cell theory?
Rudolph Virchow expanded cell theory by stating 'omnis cellula e cellula', meaning that all cells arise from pre-existing cells.
Who was the first to observe living cells and what did he observe?
Anton van Leeuwenhoek was the first to observe living cells, and he observed bacteria.
What does 'omnis cellula e cellula' mean and who proposed it?
'Omnis cellula e cellula' means all cells arise from pre-existing cells, and it was proposed by Rudolph Virchow.
How did Anton van Leeuwenhoek contribute to cell biology?
Anton van Leeuwenhoek created microscopes with 270x magnification and was the first to observe living cells, such as bacteria.
What significant discovery did Robert Brown make?
Robert Brown discovered the cell nucleus.
Define 'unicellular organism' and give two examples.
A unicellular organism is composed of a single cell that performs all life functions. Examples include Amoeba and Paramecium.
Who created the first simple microscope and when?
Zacharias Janssen created the first simple microscope in 1590.
Describe the differences between tissue level and organ level organization in multicellular organisms.
Tissue level organization involves cells with similar functions forming tissues, while organ level organization involves different tissues combining to form organs.
When did Robert Hooke first observe cells, and in what material?
In 1665, Robert Hooke first observed cells in cork.
What is the role of electron microscopes in cytology?
Electron microscopes significantly enhanced the study of cellular structures by providing much higher magnification and resolution than light microscopes.
Name the scientists who formulated the Cell Theory and its main components.
Matthias Schleiden and Theodor Schwann formulated the Cell Theory, which states that cells are the fundamental units of structure and function in living organisms and that all organisms consist of one or more cells.
Previous
Next