Nervous Tissue: The Neuron quiz #3 Flashcards
Nervous Tissue: The Neuron quiz #3
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The axoplasm of the axon contains which of the following? A) Organelles B) Cytosol C) Neurotransmitters D) Myelin
B) Cytosol What is the smallest structural and functional unit of the nervous system?
The neuron is the smallest structural and functional unit of the nervous system. Which of the following are true of spatial summation within the nervous system? A) It involves the axon B) It occurs at the synapse C) It involves multiple neurons D) It occurs in the cell body
C) It involves multiple neurons What is the function of the dendrite?
The function of the dendrite is to receive incoming signals from other neurons. What part of the neuron receives information from other neurons?
Dendrites receive information from other neurons. The myelin sheath along an axon is not continuous. What are the gaps between Schwann cells called?
The gaps between Schwann cells are called nodes of Ranvier. Which of the following structures contain many cell bodies? A) Axon B) Dendrites C) Ganglia D) Synapse
C) Ganglia What are the branched extensions of a neuron that receive signals called?
The branched extensions of a neuron that receive signals are called dendrites. What is the function of dendrites?
The function of dendrites is to receive incoming signals from other neurons. Which of the following is true about the functions of dendrites and axons? A) Dendrites send signals away B) Axons receive signals C) Dendrites receive signals D) Axons store neurotransmitters
C) Dendrites receive signals Which of the following is not part of a neuron? A) Axon B) Dendrite C) Synapse D) Cell body
C) Synapse In a myelinated axon, what is the role of the myelin sheath?
In a myelinated axon, the myelin sheath increases the speed of nerve impulse transmission. What are the three main structural parts of a neuron, and what is the primary function of each part?
The three main structural parts of a neuron are dendrites (receive incoming electrical signals), the cell body or soma (contains the nucleus and most organelles), and the axon (conducts outgoing electrical signals). What is the function of dendrites in a neuron?
Dendrites are extensions of the neuron that receive incoming electrical signals and transmit them to the cell body. What mnemonic can help you remember the direction of signal flow in a neuron?
A mnemonic is that signals 'enter' via the 'dendrites' (both have 'en'), and the axon takes the signal 'away' (both have 'a').
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