Skeletal muscle
controls our 'fight or flight' responses
div ided into the somatic nervous system (SNS), autonomic nervous system (ANS), and enteric nervous system (ENS).
basic components of the nervous system
part of the nervous system responsible for control of the bodily functions not consciously directed, such as breathing, the heartbeat, and digestive processes.
quickly activates our body preparing it for action by increasing the heart rate, dilating the pupils and the blood vessels to the muscles, increasing skin sweating, and suppressing digestion.
is the processing and control center of the nervous system, analyzing and consolidating incoming sensory information and triggering motor responses.
It detects changes in the internal and external environment through sensory receptors located throughout the body.
'rest and digest' responses
control center of the nervous system
responsible for storing sensory information, creating thoughts, emotions, and memories.
continuous with the medulla oblongata as it exits the skull through the foramen magnum, and descends into the vertebral cana
responses are voluntary
receptors Head, body surfaces, limbs, and special sense organs
the functional units of nervous tissue
consists of 31 segments corresponding to the 31 pairs of spinal nerves.
controls the opposite responses to 'fight or flight' responses
Involuntary
it depresses the activ ity of the body preparing it for rest by decreasing the heart rate, constricting the pupils and the vessels to the skeletal muscles, and stimulating digestion
brain of the gut
responses are involuntary and include peristalsis (waves of smooth muscle contraction, which propels food through the GI tract) and glandular secretions.
can be divided into four main parts: the brainstem, cerebellum, diencephalon, and cerebrum.
Smooth muscle, cardiac muscle, and glands
occupies cranial cavity
