Category: Ethics

Cell Membranes and the Phospholipid Bilayer: The Structure and Function of the Plasma Membrane

The phospholipid bilayer of the cell membrane protects the cell, provides structural support and controls the flow of molecules into and out of the cell. All living cells and many organelles, including the nucleus and mitochondria, are surrounded by a cell membrane, often called the … Continue reading Cell Membranes and the Phospholipid Bilayer: The Structure and Function of the Plasma Membrane

Actin Microfilaments, Myosin and Muscle: Cytoskeletal Control of the Cortex and Cytoplasmic Membrane

Fingers of the cytoplasmic membrane can be rapidly projected by the cytoskeleton and just as rapidly contracted. The membrane is pushed out by the addition of protein subunits to rigid actin microfilaments. Motor proteins, such as myosin, can attach to different actin microfilaments and force … Continue reading Actin Microfilaments, Myosin and Muscle: Cytoskeletal Control of the Cortex and Cytoplasmic Membrane

Leishmania Parasite Life Cycle: Leishmaniasis is a Parasitic Disease Caused by a Protozoan

Leishmania parasites are a group of closely related parasites that are transmitted to humans by the bite of a sand fly. They are protozoa belonging to the taxonomic genus Leishmania—tiny single celled parasites that cause leishmaniasis. Leishmaniasis takes different forms: cutaneous, visceral, and mucocutaneous. The … Continue reading Leishmania Parasite Life Cycle: Leishmaniasis is a Parasitic Disease Caused by a Protozoan