BIOL 223: Human Physiology and Anatomy I

Unveil the essential muscles that make breathing possible in this video. Learn why the diaphragm and scalene are crucial players and why other muscles like the trapezius and semispinalis aren't involved in respiration.

In this video, we explore virus structure, specifically focusing on glycoproteins that extend from the virus's surface. Four statements related to virus structure are examined for accuracy, including the presence of a viral membrane, the composition of capsomeres, the genetic material within viruses, and the role of glycoproteins in virus attachment to host cells. The video highlights the importance of glycoproteins in facilitating virus attachment to host cells, ultimately marking the initiatio

Explore the distinct characteristics of muscle tissues and their functions. Understand the differences between skeletal, cardiac, and smooth muscles. Get insights into the anatomy of striations, cell shapes, and nuclei.

Explore the intricacies of DNA replication and the pivotal role of Okazaki fragments. Understand the difference between the leading and lagging strands. Dive deep into the mechanisms that drive this life-sustaining process.

Discover the intricacies of catabolism and the role of the citric acid cycle in CO2 release. Understand how glycolysis leads to the production of pyruvate, ATP, and NADH. Gain clarity on how our body processes and expels carbon dioxide during cellular metabolism.

Discover the concept of negative feedback loops in biological systems, where balance is maintained by counteracting changes. Explore the four key components: Stimulus, Sensor, Control Center, and Effector, through examples like blood sugar regulation. Uncover how these loops play a crucial role in keeping our body systems in harmony.