Nervous System Intro Vocab

What is the absolute refractory period?

• Time when another action potential can be generated

• Time when the voltage-gated Na⁺ channel is activated

• Time during an action period when another action potential cannot be generated

• Time when the neuron is at rest

What is an action potential?

• A resting state of a neuron

• A change in voltage of a cell membrane in response to a stimulus

• A type of neurotransmitter

• A structural component of the neuron

What is the function of an astrocyte?

• Transmit electrical signals

• Provide support for neurons and maintain the blood-brain barrier

• Generate action potentials

• Release neurotransmitters

What does the autonomic nervous system (ANS) control?

• Voluntary muscle movements

• Sensory perception

• Homeostatic reflexes and control of cardiac and smooth muscle

• Memory and learning

Tags

NGSS.HS-LS1-3

What is the axon?

• The cell body of a neuron

• The part of the neuron that carries an electrical signal away from the cell body

• The part of the neuron that receives signals

• The synapse between neurons

What is the axon hillock?

• The end of the axon

• The tapering of the neuron cell body that gives rise to the axon

• The initial segment of the axon

• The synapse between neurons

What is a biogenic amine?

• A type of protein

• A class of neurotransmitters derived from amino acids

• A type of lipid

• A structural component of the cell membrane

What is the shape of a bipolar neuron?

• A neuron with one process extending from the cell body

• A neuron with two processes extending from the cell body

• A neuron with multiple processes extending from the cell body

• A neuron with no processes

What is the large organ of the central nervous system composed of white and gray matter?

• Spinal cord

• Brain

• Cerebral cortex

• Choroid plexus

Which part of the nervous system is located within the cranial and vertebral cavities?

• Peripheral nervous system

• Central nervous system (CNS)

• Autonomic nervous system

• Somatic nervous system