BIO 161 PSU EXAM 2 ACTUAL QUESTIONS AND
ANSWERS.
endocrine system - ANSWER: glands secret hormones directly to the blood
nervous tissue - ANSWER: fast and direct to target
functions of neurons - ANSWER: excitable, conductive, secrete neurotransmitters,
respond to stimuli
dendrites - ANSWER: receive signals from other neurons
cell body - ANSWER: contain nucleus
axons - ANSWER: can be myelinated or not, help with faster transmission
synapse - ANSWER: point in between two neurons
unipolar neurons - ANSWER: axon branches off cell body in two places
type of neurons are sensory neurons - ANSWER: unipolar
multipolar neurons - ANSWER: all dendrites go directly into the soma
bipolar neuron - ANSWER: 1 dendrite enters soma, 1 axon exits soma
bipolar neuron - ANSWER:
unipolar neuron - ANSWER:
multipolar neuron - ANSWER:
neuroglia - ANSWER: supporting cells in the nervous systems
supporting cells in CNS - ANSWER: oligodendrocytes
, supporting cells PNS - ANSWER: schwann cells
Parts of an axon - ANSWER: endoneurium, perineurium, epineurium
endoneurium - ANSWER: made of schwann cell and axon
perineurium - ANSWER: bundles into fasciles
epineurium - ANSWER: outer layer to the axon made of dense irregular tissue
circuits - ANSWER: allow body to respond to a stimuli to get back to homeostasis through
the spinal cord
meninges - ANSWER: dura, arachnoid, pia
white matter - ANSWER: made of axons
gray matter - ANSWER: made of cell bodies
afferent neurons - ANSWER: detect stimuli, delivery sensory info
afferent neurons enter info to the - ANSWER: dorsal root
efferent neurons - ANSWER: delivery motor information to the target muscles or glands
efferent neurons deliver info through the - ANSWER: ventral root
interneurons - ANSWER: integrate sensory and motor information
current - ANSWER: flow of charges particles from one point to another, require voltage
potential - ANSWER: difference in electrical charge between inside and outside of the
neurotransmitters
chemical concentration gradient - ANSWER: caused by a diffusion high to low with Na+
channels opening
ANSWERS.
endocrine system - ANSWER: glands secret hormones directly to the blood
nervous tissue - ANSWER: fast and direct to target
functions of neurons - ANSWER: excitable, conductive, secrete neurotransmitters,
respond to stimuli
dendrites - ANSWER: receive signals from other neurons
cell body - ANSWER: contain nucleus
axons - ANSWER: can be myelinated or not, help with faster transmission
synapse - ANSWER: point in between two neurons
unipolar neurons - ANSWER: axon branches off cell body in two places
type of neurons are sensory neurons - ANSWER: unipolar
multipolar neurons - ANSWER: all dendrites go directly into the soma
bipolar neuron - ANSWER: 1 dendrite enters soma, 1 axon exits soma
bipolar neuron - ANSWER:
unipolar neuron - ANSWER:
multipolar neuron - ANSWER:
neuroglia - ANSWER: supporting cells in the nervous systems
supporting cells in CNS - ANSWER: oligodendrocytes
, supporting cells PNS - ANSWER: schwann cells
Parts of an axon - ANSWER: endoneurium, perineurium, epineurium
endoneurium - ANSWER: made of schwann cell and axon
perineurium - ANSWER: bundles into fasciles
epineurium - ANSWER: outer layer to the axon made of dense irregular tissue
circuits - ANSWER: allow body to respond to a stimuli to get back to homeostasis through
the spinal cord
meninges - ANSWER: dura, arachnoid, pia
white matter - ANSWER: made of axons
gray matter - ANSWER: made of cell bodies
afferent neurons - ANSWER: detect stimuli, delivery sensory info
afferent neurons enter info to the - ANSWER: dorsal root
efferent neurons - ANSWER: delivery motor information to the target muscles or glands
efferent neurons deliver info through the - ANSWER: ventral root
interneurons - ANSWER: integrate sensory and motor information
current - ANSWER: flow of charges particles from one point to another, require voltage
potential - ANSWER: difference in electrical charge between inside and outside of the
neurotransmitters
chemical concentration gradient - ANSWER: caused by a diffusion high to low with Na+
channels opening
