Tag: autonomic nervous system

The sympathetic nervous system prepares the body for stress by increasing heart rate. It typically inhibits digestive secretions like saliva.

Preganglionic fibers in both the sympathetic and parasympathetic divisions of the autonomic nervous system are cholinergic, meaning they release acetylcholine.

The foramen magnum is the large opening at the base of the skull through which the spinal cord passes to connect with the brain.

The sympathetic nervous system is activated during stress, triggering the fight or flight response to help the body handle perceived threats.

Saltatory conduction is the propagation of action potentials along myelinated axons from one node of Ranvier to the next, which increases the speed of transmission.

The temporal lobe, particularly the hippocampus located within it, plays a critical role in the formation and storage of memories.

Parasympathetic nerve endings release acetylcholine as their primary neurotransmitter to exert their effects on target organs.

The sympathetic nervous system mediates the fight or flight response, which causes physiological changes like increased heart rate and dry mouth during stressful situations like watching a horror movie.

The autonomic nervous system, consisting of the sympathetic and parasympathetic divisions, regulates the involuntary functions of visceral organs.

Stimulation of saliva secretion is a parasympathetic effect. The sympathetic nervous system typically inhibits salivary secretion, resulting in a dry mouth.