Nervous Tissue Flashcards
What are the two main types of cells in nervous tissue?
Neurons and glial cells.
True or False: Neurons are responsible for transmitting nerve impulses.
True.
Fill in the blank: The basic functional unit of the nervous system is the ______.
Neuron.
What is the primary function of glial cells?
To support and protect neurons.
Multiple Choice: Which type of glial cell forms the myelin sheath in the central nervous system? A) Astrocytes B) Oligodendrocytes C) Microglia D) Ependymal cells
B) Oligodendrocytes.
What is the role of astrocytes in the nervous system?
They maintain the blood-brain barrier and provide metabolic support to neurons.
True or False: Microglia are involved in immune responses in the nervous system.
True.
What structure in a neuron receives signals from other neurons?
Dendrites.
Fill in the blank: The part of the neuron that sends signals away from the cell body is called the ______.
Axon.
Multiple Choice: What is the gap between two neurons called? A) Synapse B) Soma C) Axon terminal D) Dendrite
A) Synapse.
What is the function of the myelin sheath?
To insulate the axon and increase the speed of nerve impulse transmission.
True or False: All neurons are myelinated.
False.
What is the role of the node of Ranvier?
To facilitate rapid conduction of nerve impulses through saltatory conduction.
Fill in the blank: The central nervous system consists of the ______ and the ______.
Brain; spinal cord.
Multiple Choice: Which part of the brain is responsible for coordination and balance? A) Cerebrum B) Cerebellum C) Brainstem D) Thalamus
B) Cerebellum.
What is the function of the spinal cord?
To transmit signals between the brain and the rest of the body.
True or False: The peripheral nervous system includes all the nerves outside the brain and spinal cord.
True.
What are the two divisions of the peripheral nervous system?
Somatic nervous system and autonomic nervous system.
Fill in the blank: The ______ nervous system controls voluntary movements.
Somatic.
Multiple Choice: Which division of the autonomic nervous system is responsible for the fight-or-flight response? A) Sympathetic B) Parasympathetic C) Enteric D) Central
A) Sympathetic.
What is the primary neurotransmitter used in the sympathetic nervous system?
Norepinephrine.
True or False: The parasympathetic nervous system promotes ‘rest and digest’ functions.
True.
Fill in the blank: The ______ is the part of a neuron that contains the nucleus.
Soma.
What type of signaling occurs at synapses?
Chemical signaling.
Multiple Choice: Which of the following is a type of neurotransmitter? A) Glutamate B) Myelin C) Axon D) Dendrite
A) Glutamate.
What is an action potential?
A rapid change in membrane potential that propagates along the axon.
True or False: Resting membrane potential is typically positive.
False.
