BI 121 Exam Study Guide with Complete
Solutions
Sensory - ✔✔receive stimuli from environment via sensory receptors in PNS (ex:
temp, sound)
stimuli converted to nervous impulse and transferred to CNS for processing (integration)
Integration - ✔✔CNS processes all sensory signals and creates sensations, memory,
thoughts or action
Motor - ✔✔CNS sends impulse to stimulate movement in effectors outside of
nervous system (ex: muscles, glands)
Functions of the Nervous System - ✔✔1. Sensory
2. Integration
3. Motor
Neurons - ✔✔f= produce, transmit, and interpret nervous impulses
Neuroglia - ✔✔f= supportive cells around neuron; nourish, insulate, & structural
support of neurons (nerve glue)
Synapses - ✔✔gaps between adjoining neurons
Neurotransmitters - ✔✔chemicals that carry stimulus across synpase
,Central Nervous System (CNS) - ✔✔brain and spinal cord
integrative and control center
Peripheral Nervous System (PNS) - ✔✔cranial and spinal nerves
communication btw CNS and the rest of the body
Nervous System Divisions - ✔✔1. CNS
2. PNS
A-sensory (afferent)
B-motor (efferent)
B1-somatic
B2-autonomic
a-sympathetic
b-parasympathetic
Sensory (afferent) - ✔✔carry impulse from PNS to CNS
mostly unipolar, some bipolar
Motor (efferent) - ✔✔carry impulse from CNS to effector (muscles) in PNS
multipolar
, Somatic (SNS) - ✔✔conscious motor activities (ex: skeletal muscle contractions)
voluntary
Autonomic (ANS) - ✔✔unconscious motor activities (ex: smooth & cardiac muscle,
glands
involuntary
Sympathetic Division (of ANS) - ✔✔moves body away from homeostatic set point
(fight or flight)
Parasympathetic Division (of ANS) - ✔✔moves body back toward homeostatic set
point (resting & digesting)
Cell body - ✔✔region with nucleus
Processes - ✔✔extensions of membrane
Dendrites - ✔✔-a process
-f= *deliver* impulse to cell body
Axons - ✔✔-a process
-f= carry impulse *away* from cell
Solutions
Sensory - ✔✔receive stimuli from environment via sensory receptors in PNS (ex:
temp, sound)
stimuli converted to nervous impulse and transferred to CNS for processing (integration)
Integration - ✔✔CNS processes all sensory signals and creates sensations, memory,
thoughts or action
Motor - ✔✔CNS sends impulse to stimulate movement in effectors outside of
nervous system (ex: muscles, glands)
Functions of the Nervous System - ✔✔1. Sensory
2. Integration
3. Motor
Neurons - ✔✔f= produce, transmit, and interpret nervous impulses
Neuroglia - ✔✔f= supportive cells around neuron; nourish, insulate, & structural
support of neurons (nerve glue)
Synapses - ✔✔gaps between adjoining neurons
Neurotransmitters - ✔✔chemicals that carry stimulus across synpase
,Central Nervous System (CNS) - ✔✔brain and spinal cord
integrative and control center
Peripheral Nervous System (PNS) - ✔✔cranial and spinal nerves
communication btw CNS and the rest of the body
Nervous System Divisions - ✔✔1. CNS
2. PNS
A-sensory (afferent)
B-motor (efferent)
B1-somatic
B2-autonomic
a-sympathetic
b-parasympathetic
Sensory (afferent) - ✔✔carry impulse from PNS to CNS
mostly unipolar, some bipolar
Motor (efferent) - ✔✔carry impulse from CNS to effector (muscles) in PNS
multipolar
, Somatic (SNS) - ✔✔conscious motor activities (ex: skeletal muscle contractions)
voluntary
Autonomic (ANS) - ✔✔unconscious motor activities (ex: smooth & cardiac muscle,
glands
involuntary
Sympathetic Division (of ANS) - ✔✔moves body away from homeostatic set point
(fight or flight)
Parasympathetic Division (of ANS) - ✔✔moves body back toward homeostatic set
point (resting & digesting)
Cell body - ✔✔region with nucleus
Processes - ✔✔extensions of membrane
Dendrites - ✔✔-a process
-f= *deliver* impulse to cell body
Axons - ✔✔-a process
-f= carry impulse *away* from cell
