Cell biology

Cell biology

The study of cell structure, physiological properties, interactions with the environment and life cycle.

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Cell biology

Skeletal muscle

Biology; Cell biology

Muscle that is generally attached to the skeleton and causes body parts to move; consists of muscle Þbers. Voluntary muscle cells that have a striated appearance. These muscles control skeletal ...

Skeletal system

Biology; Cell biology

One of eleven major body organ systems in animals; supports the body, protects internal organs, and, with the muscular system, allows movement and locomotion.

Sensor

Biology; Cell biology

In a closed system, the element that detects change and signals the effector to initiate a response.

Semiconservative replication

Biology; Cell biology

Process of DNAreplication in which the DNA helix is unwound and each strand serves as a template for the synthesis of a new complementary strand, which is linked to the old strand. Thus, one old ...

Semilunar valve

Biology; Cell biology

A valve between each ventricle of the heart and the artery connected to that ventricle.

Selectively permeable

Biology; Cell biology

Term describing a barrier that allows some chemicals to pass but not others. The cell membrane is such a barrier.

Structure produced by some plants in which the next generation sporophyte is surrounded by gametophyte nutritive tissues. An immature sporophyte in an arrested state of development, surrounded by a ...