The antibodies induce cytotoxic reactions when they adhere to antigens on the surface of healthy cells in the body and flag them for destruction by aggressive effector cells. Type II hypersensitivity reactions
These cells respond to the detected change in the environment by relaying the information to the control center for processing, or directly to a particular target effector. Processing in the control center entails deliberation and determination of the appropriate response to the relayed stimuli. Then,...
that's a different B cell. So they're super specific, and that means we need a ton of them, a ton of diversity. But B cells need to also work correctly, and they don't need to attack the host. So this is a property called self tolerance, which just means that the B cell ...
16. Regulation of Expression3h 31m Introduction to Regulation of Gene Expression 13m Prokaryotic Gene Regulation via Operons 27m The Lac Operon 21m Glucose's Impact on Lac Operon 25m The Trp Operon 20m Review of the Lac Operon & Trp Operon ...
It suggests the following tenets: (1) All living things are made up of one or more cells, (2) the cell is the structural and functional unit, (3) cells come from a pre-existing process of division, (4) all cells have the same chemical composition, and (5) energy flow occurs within...
What is the role of the effector mechanism in the control of homeostasis? How does homeostasis work? What is the negative feedback? a) What is homeostasis? b) How does the endocrine system maintain homeostasis in the body? c) How does the nervous system help the endocrine system maintain ...
All cells are able to sense and respond to substances present in their external environments. For example, motile bacteria will move toward a source of sugar but away from a toxic chemical such as phenol. Cells are not only able to sense chemical substances in their environments, but also ...
In the case of changes in body temperature, the group of cells in the hypothalamus of the brain acts as the control unit. 4. Counteract on the stimulus As the final step of the loop, the control unit sends out signals to nullify the effects causing changes in the physiological factors. ...
changes that lead to changes in the cell’s morphology or death. It results in the death of 50 to 70 billion cells per day in an average adult human being. It is also termed as ‘cellular suicide’ as cells undergo a highly regulated process for the programmed removal of cells from the...
Supporting the importance of these features of integrin β1 recycling for cell motility, we found that integrin β1-dependent cell motility requires the activation of Arf6 and its actin effector function.; Finally, we investigated how stimulation might induce integrin β1 recycling. We found that ...