nervous tissue Flashcards
learn carnial nerves and tissue
Cranial Nerve 1
Olfactory (Smell)
Cranial Nerve 2
Optic (vision)
Cranial Nerve 3
Oculomotor (Eye movement; pupil constriction)
Cranial Nerve 4
Trochlear (Eye movement)
Cranial Nerve 5
Trigeminal (Somatosensory information (touch, pain) from the face and head; muscles for chewing)
Cranial Nerve 6
Abducens (Eye movement)
Cranial Nerve 7
Facial (Taste (anterior 2/3 of the tongue); somatosensory information from the ear; controls muscles used in facial expression.)
Cranial 8
vestibulocochlear (Hearing; balance)
Cranial Nerve 9
Glossopharyngeal (Taste (posterior 1/3 of the tongue); Somatosensory information from tongue, tonsil, pharynx; controls some muscles used in swallowing)
Cranial Nerve 10
Vagus (Sensory, motor and autonomic functions of viscera (glands, digestion, heart rate))
Cranial Nerve 11
Spinal Accessory (Controls muscles used in head movement)
Cranial Nerve 12
Hypoglossal (controls muscle of tongue)
sensory neurons
Neurons, Receive, 5 senses(taste,touch,smell, vision, hearing)
Interneurons
Neurons, Interpret (in between both cells responsible for the interpretive part of creating an action)
Motor Neurons
Neurons, Respond (reaction to pain, good food, bad smell)
Astrocytes
neuroglia (CNS) Astrocytes are a type of neuroglia found in the central nervous system. They are named after their star-shaped structure. Astrocytes are the most abundant type of neuroglia and they play an important role in creating structure, supporting and regulating the concentration of ions and neurotransmitters in the extracellular space. They also help to regulate substances that move in and out of the blood and the brain by maintaining the blood-brain barrier.
Oligodendrocytes
neuroglia (CNS) Oligodendrocytes are cells in the central nervous system that have multiple finger-like structures. These structures allow them to support multiple neurons, with a ratio of one oligodendrocyte to many neurons. The main responsibility of oligodendrocytes is to coat neurons with myelin, which is a fatty tissue that insulates the axon of the neuron. This insulation helps conduct electrical impulses and deliver messages to surrounding tissues.
Ependymal Cells
neuroglia (CNS) Ependymal cells are responsible for aligning the ventricles and central canal of the spinal cord. They produce cerebrospinal fluid, which creates cushioning to protect the brain and spinal cord.
Microglia
neuroglia (CNS) Microglia are immune cells of the central nervous system. They act as the first line of defense, fighting off pathogens, removing debris via phagocytosis, modulating inflammation, and promoting tissue repair.
Satellite Cells
neuroglia (PNS) Satellite cells are equivalent to astrocytes in the peripheral nervous system. They are more abundant and provide structural support, micromanage the environment of the neuron they are supporting, and monitor the waste and nutrients that come in contact with the neuron.
Schwann Cells
neuroglia (PNS) Schwann cells create myelin for peripheral neurons; the ratio is 1:1. They increase nerve impulse conductivity.
CNS
Central Nervous System
PNS
peripheral nervous system