There is an activation of a specific gene by a growth factor.
The breakdown of rhodopsin causes activation of the visual signaling pathway in response to light. This ultimately leads to the generation of electrical signals that are transmitted to the brain for image processing and vision.
As a comet approaches the Sun, the heat causes ice and other volatile substances within the comet to vaporize. This forms a glowing coma (a cloud of gas and dust) around the solid nucleus of the comet. The solar wind then pushes this gas and dust away from the Sun, forming a tail that can stretch for millions of kilometers in the opposite direction of the Sun.
Instability is due to a certain ratio between neutrons and protons in the atomic nucleus.
stimulus
Increased sympathetic tone leads to the release of norepinephrine, which binds to alpha-1 adrenergic receptors on arteriolar smooth muscle. This binding initiates a signaling cascade that ultimately results in the relaxation of the smooth muscle, causing the arterioles to dilate.
The breakdown of rhodopsin causes activation of the visual signaling pathway in response to light. This ultimately leads to the generation of electrical signals that are transmitted to the brain for image processing and vision.
A positive response is when a response happens to a stimuli, and this response causes more of the stimuli to happen. A negative response is when a response happens because of a stimuli, and the response stops the continuation of the stimuli.
A stimulus is a factor that causes a response in an organism.
a stimulus causes a response
Up-regulation refers to the increase in the number or sensitivity of receptors in response to a decrease in signaling molecules, leading to increased cell responsiveness. Down-regulation is the opposite, where the number or sensitivity of receptors decreases in response to an excess of signaling molecules, thus reducing cell responsiveness. These changes are typically caused by fluctuations in the levels of signaling molecules or prolonged exposure to a stimulus.
A reaction is what happens to the body when a stimulus is applied, a response is what happens next; i.e a stimulus illicits a reaction which illicits a respose. For example, glucose in the blood (a stimulus) causes the pancreas to release insulin (a reaction), which in turn causes the cells to take up glucose from the blood (a response).
an antigen
A stimulus.
An unstable nucleus, which can be caused by:excess of neutronsshortage of neutronsmetastable excited state of nucleus
stimulus
non response, in accurate response and selection bias
Yes, an action is typically the stimulus that triggers a response in a system or organism. In the context of cause and effect, the action is what instigates the reaction or outcome.