Why would a meal normally increase gastrin levels? What, in addition to HCl, does gastrin stimulate? How? Explain how cardiac muscle cells are able to function as a syncytium despite being composed of single-cel
How are certain body cells adapted to perform specific functions, such as the motor neuron and male gamete?? Cells: When studying the human body, you will find that systems are made of organs, organs made of tissues, and tissues are made of cells. Although ...
As the cells inside a person lose their connections, the person may start convulsing or having muscle spasms. We can't know exactly how the person is feeling at this point, though those who have had near-death experiences (NDE) seem to agree that the process isn't painful. NDEs appear ...
At 18, Katie Stubblefield lost her face. At 21, she became the youngest person in the U.S. to undergo the still experimental surgery. Follow her incredible story.
coli to sense food, move around, eat and reproduce. See How Cells Work for more details. You can see that, in any living cell, DNA helps create enzymes, and enzymes create the chemical reactions that are "life." In the next section, we'll discuss how bacteria reproduce. How Life ...
Cancer cells grow in some locales, die in others, go to sleep in yet others. A cancer cell reaching heart or skeletal muscle tends not to grow, which is like a plant seed fall- ing on concrete, says Ghajar. Cancer rarely afflicts these tissues. Elsewhere, cancer cells fall on more ...
Figure 4. The growth curve of a bacterial culture is represented by the logarithm of the number of live cells plotted as a function of time. The graph can be divided into four phases according to the slope, each of which matches events in the cell. The four phases are lag, log, statio...
Cancer cells grow in some locales, die in others, go to sleep in yet others. A cancer cell reaching heart or skeletal muscle tends not to grow, which is like a plant seed fall- ing on concrete, says Ghajar. Cancer rarely afflicts these tissues. Elsewhere, cancer cells fall on more ...
Stimulated endothelial cells in these regions express higher levels of the aforementioned molecules, promoting vasodilation to restore endothelial function. Vascular Smooth Muscle Cells Vascular smooth muscle cells (VSMCs) play a crucial role in AS, with their migration, proliferation, and secretion ...
How does the smooth muscle cell function? How could the structure and function of the cell be used to support evolutionary theory? Why is blood classified as connective tissue? In what kind of cells can you find peroxisomes, and how many are in each cell?