What body system is the stimulus in?

What body system is the stimulus in?

nervous system, organized group of cells specialized for the conduction of electrochemical stimuli from sensory receptors through a network to the site at which a response occurs. The movement of impulses through the nerve cell, involving both chemical and biological changes.

What is an example of an internal stimulus within the human body?

Internal stimuli are changes to the conditions inside the body. The examples we know best are when your body is lacking water or food, when you’ve eaten contaminated food, or when a virus is present in the body. The body responds rapidly to these situations as well.

What is the definition of stimulus in Physiology?

In physiology, a stimulus is a detectable change in the physical or chemical structure of an organism’s internal or external environment. The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity .

How does the body respond to external stimuli?

Epinephrine, also known as adrenaline, is also used commonly to respond to both internal and external changes. One common cause of the release of this hormone is the Fight-or-flight response. When the body encounters an external stimulus that is potentially dangerous, epinephrine is released from the adrenal glands.

How does the nervous system respond to stimuli?

Systematic response 1 Nervous-system response. Though receptors and stimuli are varied, most extrinsic stimuli first generate localized graded potentials in the neurons associated with the specific sensory organ or tissue. 2 Muscular-system response. 3 Endocrine-system response. 4 Digestive-system response.

How are muscle fibers stimulated by external stimuli?

When muscles receive information from internal or external stimuli, muscle fibers are stimulated by their respective motor neuron. Impulses are passed from the central nervous system down neurons until they reach the motor neuron, which releases the neurotransmitter acetylcholine (ACh) into the neuromuscular junction.