nervous system pt.2 Flashcards
central nervous system makes up the___
brain and spinal cord
the brain is known as the ___
command center
the forebrain controls…
voluntary movement
touch perception
smell
midbrain controls…
vision
hearing
info processing
hindbrain controls…
involuntary activities
balance and posture
the peripheral nervous system is composed of….
all nervous tissue outside of the CNS
what are the divisions of the peripheral nervous system?
-afferent (sensory) system
-motor (efferent) system
what does the afferent system do?
conducts sensory info from the peripheral body parts to the CNS, specialized receptors detect stimuli and transform the energy into action potential
what are the types of various sensory receptors that allow an animal to respond to its environment?
-exteroceptors: external surface
-interceptors: internal organs
-proprioceptors: muscles, tendons, and joints
what are the further classifications of receptors that form energy?
-chemoreceptors: smell and taste
-mechanoreceptors: touch, pressure, stretching, sound, vibration, gravity, and all forms of motion. associated with hairs
-photoreceptors: vision
what does motor (efferent) system command to?
commands to muscles and glands
somatic nervous system and autonomic nervous system
are the divisions of the motor system
somatic nervous system is responsible for
motor messages to skeletal muscle- conscious
motor messages to smooth muscle, cardiac muscle, and glands - automatic (involuntary)
autonomic nervous system
autonomic nervous system divides into
-sympathetic nervous system
-parasympathetic
active under conditions of high stress or physical activity
sympathetic nervous system
cell bodies located in thoracic and upper lumbar regions of spinal cord
sympathetic nervous system
what are the symptoms when the sympathetic nervous system is active?
-pupils dilate, dry mouth, dry mouth, dilate bronchioles, increased heart rate, adrenaline secretes, retain and decrease digestion and bladder
parasympathetic system
active during resting conditions
where do the neurons emerge from the parasympathetic system
neurons emerge from the CNS and pelvic region of the spinal cord.
