Nervous Tissues Flashcards
(25 cards)
What are the two main types of nervous tissue?
Neurons and glial cells.
True or False: Neurons are responsible for transmitting signals in the nervous system.
True.
Fill in the blank: The supporting cells in the nervous system are known as _____.
glial cells.
What is the primary function of neurons?
To transmit electrical impulses throughout the body.
Which type of glial cell forms myelin sheaths around neurons?
Oligodendrocytes in the CNS and Schwann cells in the PNS.
Multiple Choice: Which of the following is NOT a type of glial cell? A) Astrocytes B) Microglia C) Neurons D) Ependymal cells
C) Neurons.
What is the role of astrocytes?
To support and maintain the blood-brain barrier, and regulate nutrient flow.
True or False: Microglia are the immune cells of the nervous system.
True.
What is the function of ependymal cells?
To line the ventricles of the brain and produce cerebrospinal fluid.
Fill in the blank: The _____ is the part of the neuron that receives signals from other neurons.
dendrite.
What is the purpose of the axon in a neuron?
To transmit impulses away from the cell body.
Multiple Choice: Which part of the neuron is responsible for the action potential? A) Dendrite B) Cell body C) Axon D) Synapse
C) Axon.
True or False: Myelination increases the speed of nerve impulse conduction.
True.
What is the gap between two neurons called?
Synapse.
Fill in the blank: The _____ is the part of the neuron that contains the nucleus.
cell body (soma).
What neurotransmitter is primarily involved in muscle contraction?
Acetylcholine.
Multiple Choice: Which of the following is a function of glial cells? A) Transmit signals B) Provide support C) Produce hormones D) Generate action potentials
B) Provide support.
What is the role of Schwann cells?
To produce myelin in the peripheral nervous system.
True or False: Neurons can regenerate after injury.
False, they have limited regenerative ability.
Fill in the blank: The _____ is the electrical signal that travels along the axon.
action potential.
What is the function of neurotransmitters?
To transmit signals across synapses between neurons.
Multiple Choice: Which type of glial cell is involved in the removal of debris in the nervous system? A) Astrocytes B) Oligodendrocytes C) Microglia D) Ependymal cells
C) Microglia.
What is the primary function of the blood-brain barrier?
To protect the brain from harmful substances in the bloodstream.
Fill in the blank: The _____ is a fatty substance that insulates axons.
myelin.
