Class 1 Flashcards
What are Afferent neurons?
Afferent (sensory) information is carried from bodies tissues, about its internal and external environments to central nervous system.
What are Efferent neurons?
Efferent (motor) transmission of directive signals from CNS to effectors in body tissues.
Central Nervous System (CNS) includes ____________ and ____________.
includes brain and spinal cord
Peripheral Nervous System (PNS) includes ________________.
Includes everything else within nervous system. Split
into sensory and motor division.
_____________________ carries afferent signals from sensory neurons to the CNS.
Sensory division
______________________ carries efferent signals from the CNS to effectors
Motor division
Motor division can be further split into two more divisions which are?
• Somatic nervous system
• Autonomic nervous system
What is somatic nervous system?
Also known as voluntary nervous system because it controls voluntary movement.
What is the autonomic nervous system?
Monitors and controls body activities such as cardiac, smooth muscle, glands etc) automatically.
Autonomic nervous system can be split to two more
subdivisions which are?
• Sympathetic nervous system
• Parasympathetic nervous system
What is the sympathetic nervous system?
Also known as the fight or flight system, activity can come from being excited, scared, or threatened
What is the parasympathetic nervous system?
Also known as the rest and digest system. Used to conserve and restore energy systems, and increased digestive and urinary functions.
What is bile?
A thick fluid secreted by liver and stored in gallbladder. Helps digestion by breaking down fats into absorbable fatty acids.
What is the enteric nervous system?
Enteric system is largest and most complex unit of peripheral nervous system, with ~600 million neurons releasing a multitude of neurotransmitters to facilitate motor, sensory, absorptive, and secretory functions of gastrointestinal tract.
What is the function of the olfactory cranial nerve?
Sensation of smell
What is the function of the optic cranial nerve?
Sensation of vision
What is the function of the oculomotor cranial nerve?
Movements of eye and eyelid. Parasympathetic control
of pupil size
What is the function of the trochlear cranial nerve?
Movements of eye
What is the function of the trigeminal cranial nerve?
Sensation of touch to face. Movement of muscles of
mastication (chewing)
What is the function of the abducens cranial nerve?
Movement of eye
What is the function of the facial cranial nerve?
Movement of muscles of facial expression. Sensation of taste in anterior two thirds of tongue.
What is the function of the auditory-vestibular cranial nerve?
Sensation of hearing and balance
What is the function of the glossopharyngeal cranial nerve?
Movement of muscles in throat. Parasympathetic
control of salivary glands. Sensation of taste in posterior one-third of tongue. Detection of blood pressure changes in aorta.
What is the function of the vagus cranial nerve?
Parasympathetic control of heart, lungs, and abdominal organs. Sensation of pain associated with viscera. Movement of muscles in throat.
What is the function of the spinal accessory cranial nerve?
Movement of muscles in throat and neck
What is the function of the hypoglossal cranial nerve?
Movement of tongue
What is Cranial Nerve V: Trigeminal?
Trigeminal nerve supplies sensations to face and other structures of head.