ECPI UNIT 4 EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
Neurons that conduct impulses from the CNS to muscles or glands are - Answer-motor
neurons
When the membrane potential becomes more negative due to leaking K+ ions causing
the membrane potential to go down to - 90mV, it is said to be ? - Answer-
Hyperpolarizing
Which of the following systems consists of the brain and spinal cord? - Answer-central
nervous system
Convergent neurons - Answer-Have impulses coming in from multiple presynaptic
neurons
Neuroglia mainly responsible for forming scar tissue and part of the blood brain barrier
in the CNS: - Answer-astrocytes
This type of neuroglial cell will line the central canal of the spinal cord and ventricles of
the brain, help regulate the cerebral spinal fluid and are a type of cuboidal or
columnar cells? - Answer-Ependyma or ependymal cells
Minimal strength of stimulus (voltage level) required to trigger an action potential: -
Answer-threshold potential
Neuroglia that forms myelin in the peripheral nervous system (PNS): - Answer-Schwann
cells
The functional connection between two neurons is a - Answer-synapse
Do neuron bodies regenerate? - Answer-No
Neurons that have one axon and many dendrites - Answer-multipolar
The hormone that prepares our bodies for emergency action (the "fight or flight" mode)
is - Answer-epinephrine
Hormone that contracts the uterus in a positive feedback cycle during child birth: -
Answer-oxytocin
Hormone that elevates blood calcium: - Answer-parathyroid hormone
Hormone that stimulates kidneys to conserve water: - Answer-antidiuretic hormone
COMPLETE SOLUTIONS
Neurons that conduct impulses from the CNS to muscles or glands are - Answer-motor
neurons
When the membrane potential becomes more negative due to leaking K+ ions causing
the membrane potential to go down to - 90mV, it is said to be ? - Answer-
Hyperpolarizing
Which of the following systems consists of the brain and spinal cord? - Answer-central
nervous system
Convergent neurons - Answer-Have impulses coming in from multiple presynaptic
neurons
Neuroglia mainly responsible for forming scar tissue and part of the blood brain barrier
in the CNS: - Answer-astrocytes
This type of neuroglial cell will line the central canal of the spinal cord and ventricles of
the brain, help regulate the cerebral spinal fluid and are a type of cuboidal or
columnar cells? - Answer-Ependyma or ependymal cells
Minimal strength of stimulus (voltage level) required to trigger an action potential: -
Answer-threshold potential
Neuroglia that forms myelin in the peripheral nervous system (PNS): - Answer-Schwann
cells
The functional connection between two neurons is a - Answer-synapse
Do neuron bodies regenerate? - Answer-No
Neurons that have one axon and many dendrites - Answer-multipolar
The hormone that prepares our bodies for emergency action (the "fight or flight" mode)
is - Answer-epinephrine
Hormone that contracts the uterus in a positive feedback cycle during child birth: -
Answer-oxytocin
Hormone that elevates blood calcium: - Answer-parathyroid hormone
Hormone that stimulates kidneys to conserve water: - Answer-antidiuretic hormone
