Module 7

Neurons that transmit action potentials from the central nervous system to effector organs are called what?

• Afferent neurons

• association neurons

• efferent neurons

Neurons that transmit action potentials from the sensory organs to the central nervous system are called what?

• association neurons

• efferent neurons

• afferent neurons

Unmyelinated neurons conduct faster than myelinated neurons. True or False

The interior of a neuron at rest

• is at the samfe voltage potential as the outside

• has the same ionic concentrations as the outside

• is positively charged relative to the outside

• is negatively charged relative to the outside

• B and C are correct

Tags

NGSS.HS-PS1-3

The neuron is composed of the

• cell body, axon, ganglia

• axon, synapse, ganglia

• synapse, ganglia, dendrites

• cell body, axon, dendrites

What are the specialized type of connective tissue that includes glia cells, and non-neuronal cells of the CNS and PNS?

• ganglia

• neurons

• neuroglia

• neurotransmitters

What keeps an action potential on an axon from stimulating another action potential that will travel back toward the cell body?

• refractory period

• relative refractory period

• absolute refractory period

• potential period

Which of the following are true regarding the action potential (AP)

• The AP is carried along the axon membrane

• The AP is an all or non signal

• The AP is always of the same amplitude and duration in a given cell

• the AP is a brief electrical signal

• All of the above are correct

Tags

NGSS.HS-PS2-5

The "all or none law" refers to the observeration that an action potential

• will dimmish to near zero when transmitted won a ling axon.

• is conducted more rapidly down the axon as it reaches the axon terminal.

• is produced whenever the membrane potential reaches threshold.

Chemicals that transmit an impulse across a synapse to anther cell are?

• reflexes

• neurotransmitters

• action potentials

• cell bodies