nervous system

what are the 2 major anatomical divisions

• central nervous system

• peripheral nervous system

• somatic nervous system

• autonomic nervous system

true or false, when conducting an action potential, saltatory propagation is faster than continuous propagation

• true

• false

how is the neurotransmitter removed from the synaptic cleft?

• it is broken down by specific enzymes

• it is reabsorbed back into the presynaptic neuron

• it diffuses away

• all the above

which of the following types of channels open and closes in response in an electrical stimulus

• mechanically-gated channels

• na/k atpase

• ligand-gated channels

• voltage-gated channels

• leakage channels

which of the following is not typically a structure found on most neurons?

• synaptic and bulbs

• cell body

• dendrites

• axon

• sarcolemma

what is stored in the synaptic vesicles in the presynaptic neuron

• an action potential

• sodium ions

• neurotransmitters

• calcium ions

• ATP

how are graded potential different from action potential?

• graded potentials are smaller

• graded potentials only travel a short distance

• they are usually associated with the dendrites of a neuron

• they can be either excitatory is inhibitory

• all of the answers are correct

which of the following types of channels does not use passive energy for the movement of ions?

• leakage channels

• voltage-gated channels

• ligand-gated channels

• na/k atpase

• mechanically-gated channels

which of the following types of channels opens and closes passively without the need for a stimulus

• leakage channels

• ligand-gated channels

• voltage-gated channels

• mechanically-gated channels

all motor neurons that control skeletal muscle are which type of neuron?

• multipolar

• bipolar

• unipolar