Cell Structure and Function Concepts

The video tutorial introduces cells as the fundamental unit of life, discussing their discovery through the invention of the microscope by scientists like Antony van Leeuwenhoek and Robert Hooke. It explains the cell theory proposed by Schleiden, Schwann, and Virchow, highlighting that all living organisms are composed of cells. The tutorial also covers the efficiency of small cell sizes and the relationship between cell shapes and their functions, using examples like nerve and muscle cells.

What is the fundamental structural and functional unit of all living organisms?

• Organ

• Tissue

• Cell

• Organism

Who was the first scientist to construct a microscope using a single lens?

• Theodor Schwann

• Rudolf Virchow

• Antony van Leeuwenhoek

• Robert Hooke

Which scientist coined the term 'cell' after observing cork under a microscope?

• Rudolf Virchow

• Matthias Schleiden

• Robert Hooke

• Antony van Leeuwenhoek

Who proposed that all plants are made up of cells?

• Matthias Schleiden

• Rudolf Virchow

• Theodor Schwann

• Antony van Leeuwenhoek

What addition did Rudolf Virchow make to the cell theory?

• Cells are microscopic

• Cells are the basic unit of life

• Cells have a nucleus

• All cells arise from pre-existing cells

Why do small cells have greater efficiency?

• They have more DNA

• They can divide faster

• They have a larger surface area to volume ratio

• They have more organelles

What is the advantage of a large surface area to volume ratio in cells?

• Increased energy production

• Faster diffusion of substances

• More space for organelles

• Greater structural support

How does the shape of a nerve cell relate to its function?

• It is flat to cover surfaces

• It is irregular to fit in tight spaces

• It is long to conduct impulses

• It is round to store nutrients

Why do muscle cells have a smooth and long shape?

• To store fat

• To protect organs

• To aid in contraction and relaxation

• To transport oxygen

What determines the shape of a cell?

• Its location in the body

• The function it performs

• The amount of DNA it contains

• The type of organism it belongs to