QCM : Fundamentals of Cell Structure and Body Systems — 9 questions

Explication

Tissues are groups of similar cells that work together to perform specific functions, which support the overall activities and health of the body. This organization allows for efficient functioning of organs and systems.

Explication

Louis Pasteur is credited with proposing the germ theory of disease, which established that microorganisms are the cause of many diseases. This was a foundational concept in microbiology and medicine, differentiating his contribution from others like Koch, Fleming, and Jenner, who are known for identifying specific pathogens, discovering antibiotics, and developing vaccines, respectively.

Explication

Mitochondria are known as the 'powerhouses' of the cell because they produce ATP, the energy currency, through aerobic respiration, making them the key component responsible for energy release.

Explication

Red blood cells are responsible for transporting oxygen from the lungs to body tissues and returning carbon dioxide to the lungs, whereas platelets are involved in blood clotting to prevent bleeding. Their functions are distinct but both are essential components of blood.

Explication

The basic understanding of the human digestive system's function was established in ancient Greece, where early physicians like Hippocrates and Galen described the digestive organs and their roles. More detailed scientific knowledge developed later, but the earliest recognition dates back to ancient times.

Explication

Vaccination stimulates the immune system to produce specific antibodies and memory cells, which enable the body to respond quickly and effectively to future infections by the same pathogen, thus providing immunity.

Explication

Providing more light increases the energy available for photosynthesis, directly enhancing the process. Reducing temperature or watering frequency does not directly increase photosynthesis rate, and applying fertilizer mainly supplies nutrients but does not directly affect the light-dependent reactions.

Explication

Mitosis is primarily responsible for producing genetically identical daughter cells, which is essential for growth, tissue repair, and asexual reproduction, as explicitly described in the content.

Explication

Mitochondria are known as the 'powerhouses' of the cell because they generate energy in the form of ATP through aerobic respiration, which is essential for cellular activities.