BISC 225 Test 4 | Louisiana Tech University | Questions with 100% Verified Answers | Latest Update

BISC 225 Test 4 | Louisiana Tech University | Questions with 100% Verified
Answers | Latest Update

Question: Neuron
Answer:
Cells specialized to react to physical and chemical changes in their surroundings

Question: Dendrites
Answer:
Small cellular process that receive the input

Question: Nerves
Answer:
Bundles of axons

Question: Axon
Answer:
Nerve fiber that carries information away from the cell

Question: Nerve Impulse
Answer:
Bioelectric signals

Question: Neuroglial Cells
Answer:
Specialized cell of the nervous system that produces myelin, communicates between cells, and
maintains the ionic environment, as well as provides other functions

Question: Synapses
Answer:
Small spaces between neurons that are important centers for the transmission of
electrochemical messages

Question: Neurotransmitters
Answer:
Carriers of the biological messenger molecules

,Question: CNS
Answer:
Brain and spinal cord

Question: PNS
Answer:
Cranial and spinal nerves

Question: Sensory Receptors
Answer:
Specialized dendrite that detects a stimulus and fires and action potential in response

Question: Somatic Nervous System
Answer:
Involved in conscious activities, such as skeletal muscle contraction

Question: Autonomic Nervous System
Answer:
Controls viscera, such as the heart and various glands and controls subconscious actions

Question: Cell Body
Answer:
Portion of a nerve cell that includes a cytoplasmic mass and a nucleus, and from which the
nerve fibers extend

Question: Sensory, integrative, motor
Answer:
Functions of the CNS and PNS

Question: Neurofibrils
Answer:
Network of fine threads that extends into the axons and supports them

Question: Chromatophilic Substance
Answer:
Membranous packets scattered throughout the cytoplasm

,Question: Collaterals
Answer:
Branches off the axon

Question: Axon Terminal
Answer:
Fine extensions with a specialized ending

Question: Synaptic Cleft
Answer:
A narrow extracellular space between the presynaptic and postsynaptic neurons

Question: Schwann Cells
Answer:
Lipid-rich sheaths formed by layers of cell membranes of neuroglial cells

Question: Myelin
Answer:
Fatty material that forms a sheathlike covering around some nerve fibers

Question: Myelin Sheath
Answer:
..., a layer of fatty tissue encasing a neuron's axon that speeds transmission

Question: Neurilemma
Answer:
Sheath on the outside of some nerve fibers formed from Schwann cells

Question: Nodes of Ranvier
Answer:
A short region of exposed (unmyelinated) axon between Schwann cells on neurons of the PNS

Question: Trigger Zone
Answer:
Sensitive region of the axon

, Question: Bipolar Neuron
Answer:
Cell Body has two similar processes

Question: Bipolar Neuron
Answer:
Neurons found withing parts of the eyes, nose and ears

Question: Unipolar Neuron
Answer:
Neurons with a single process extending from the cell body;

Question: Multipolar Neuron
Answer:
Many processes arising from the cell body; one is an axon and the rest are dendrites.

Question: Multipolar Neuron
Answer:
Most neurons found in the brain or spinal cord

Question: Sensory Neurons (Afferent)
Answer:
Carry nerve impulses from peripheral body parts into the brain or spinal cord.
-Specialized receptor ends

Question: Interneurons
Answer:
Form links between other neurons and transmit impulses from one part of the brain or spinal
cord to another

Question: Motor Neurons (Efferent)
Answer:
Carry nerve impulses out of the brain or spinal cord to effectors