A muscle cell dies, so that there is no ATP left in the sarcoplasm. However, there is lots of Ca2 in the sarcoplasm. This results in: Group of answer choices Myosin heads that are bound to actin. Low levels of Ca2 in the sarcoplasm (cytoplasm of the muscle cell). The cell is in rigor. A myosin head that has dis-associated from the actin, but still has ADP and Pi bound.

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen

Creating new things to solve problems and improve life depends on the close interaction of which two fields?

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.