BIO 181: General Biology I

Explore the composition of the diaphysis in long bones. Learn about the significance of compact bone in providing strength and differentiating it from other bone components.

Discover how cholesterol, a substance found in our body and certain foods, significantly impacts cell membrane fluidity. Learn its varying effects under different temperatures and in diverse cellular lipid compositions. Uncover its indispensable role in nerve signal transmission and cellular health.

Uncover the fundamentals of human muscle contraction and anatomy in this lesson. Highlighting the distinct roles of muscle origin and insertion we clarify their functions in movement. Learn why the muscle origin is the cornerstone of stability during contraction anchoring our body mechanics.

Explore the intricate components of the endomembrane system within a cell. Identify which structures belong to this system and which do not, with a specific focus on the unique role of the chloroplast.

Discover the essence of hydrostatic pressure and its significance in capillary beds, examining its relationship with colloid osmotic pressure and how it affects fluid movement in our circulatory system.

Discover the evolution of plant-eating habits in insects, the links between moths, butterflies, caddisflies, flies, and fleas. Explore the hypothesis of how herbivory could influence speciation and diversity within the insect kingdom.