Nervous System Flashcards Exam 3

Bipolar neurons are commonly ________. A) motor neurons B) called neuroglial cells C) found in ganglia D) found in the retina of the eye

Bipolar neurons are commonly ________.

Which of the following describes the nervous system integrative function?

The period after an initial stimulus when a neuron is not sensitive to another stimulus is the ________.

The part of a neuron that conducts impulses away from its cell body is called a(n) ________.

Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of action potentials?

An impulse from one nerve cell is communicated to another nerve cell via the ________.

Which of the following is not a function of the autonomic nervous system?

Collections of nerve cell bodies outside the central nervous system are called ________.

What does the central nervous system use to determine the strength of a stimulus?

What are ciliated CNS neuroglia that play an active role in moving the cerebrospinal fluid called?

Which of the choices below describes the ANS?

Which of the following is not a function of astrocytes?

The adult spinal cord extends only to the ________.

Neuron Types and Functions

Bipolar neurons are primarily located in the retina of the eye, playing a vital role in visual processing.
The nervous system's integrative function involves analyzing sensory information, storing data, and making decisions.

Neuron Activity and Impulses

The absolute refractory period is a phase where a neuron is unresponsive to stimulus following an initial action potential.
Axons are the parts of neurons that conduct impulses away from the cell body, essential for signal transmission.

Ion Channels and Synaptic Communication

Voltage-gated channels open in response to membrane potential changes, crucial for generating and conducting action potentials.
Synapses are the junctions through which impulses are communicated from one nerve cell to another.

Autonomic Nervous System (ANS) Functions

The ANS does not innervate skeletal muscle, focusing instead on smooth muscle, cardiac muscle, and glands.
Collections of nerve cell bodies outside the central nervous system are known as ganglia.

Stimulus Strength and Central Nervous System

The central nervous system assesses stimulus strength based on the frequency of action potentials rather than their size.
Ependymal cells are specialized CNS neuroglia that help in the movement of cerebrospinal fluid.

Definitions and Roles

The ANS includes motor fibers that transmit impulses from the CNS to smooth muscle, cardiac muscle, and glands.
Astrocytes support and brace neurons and have roles in maintaining the chemical environment around them, but they do not provide defense for the CNS.

Spinal Cord Anatomy

The adult spinal cord extends down to the first or second lumbar vertebra, marking an important anatomical landmark.

Test your knowledge on the nervous system with these flashcards. Covering various key concepts, including neuron types and their functions, this quiz challenges your understanding of the nervous system's integrative processes. Perfect for exam preparation.