BIOL 207 Rourke Exam 2 | Questions And Answers |
Latest Study Updates
dendrites ANS branchlike parts of a neuron that are specialized to receive information
axon hillock ANS the conical region of a neuron's axon where it joins the cell body; typically the region
where nerve signals is generated.
myelin sheath ANS a layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly
greater transmission speed of neural impulses as the impulse hops from one node to the next
nodes of ranvier ANS gaps in the myelin sheath to which voltage-gated sodium channels are confined
axon terminals ANS branches at the end of the axon that contain tiny pouches, or sacs, called synaptic
vesicles
central nervous system ANS made up of the brain an the spinal cord
sensory neuron ANS neurons that carry incoming information from the sensory receptors to the brain and
spinal cord; afferent
interneuron ANS central nervous system neurons that internally communicate and intervene between the
sensory inputs and motor outputs
motor neuron ANS a neuron that sends an impulse to a muscle or gland, causing the muscle or gland to
react; efferent
peripheral nervous system ANS the sensory and motor neurons that connect the central nervous system to
the rest of the body; cranial and spinal nerves
afferent ANS conveying toward a center; sensory information from the PNS to the CNS
receptors ANS detect changes and respond to stimuli
, effectors ANS respond to efferent signals
efferent ANS conveying away from the center; motor commands from the CNS to the PNS
somatic sensory ANS carry signals from the muscles, bones, skin, joints
visceral sensory ANS carry signals from organs
somatic motor ANS carries signals to skeletal muscles
autonomous nervous ANS carry signals to smooth, cardiac muscles and glands; sympathetic and
parasympathetic
astrocytes ANS provide structural and metabolic support for neurons; form the blood brain barrier and scar
tissue; neuroglia of the CNS
microglia ANS act as phagocytes, eating damaged cells and bacteria, act as the brains immune system;
clean up cellular debris
oligodendrocytes ANS type of glial cell in the CNS that wrap axons in a myelin sheath
ependymal cells ANS line cavities of the brain and spinal cord, circulate cerebrospinal fluid; neuroglia of
the CNS
Schwann cells ANS supporting cells of the peripheral nervous system responsible for the formation of
myelin
satellite cells ANS surround neuron cell bodies in PNS; regulate the environment around the neuron
sodium leak channel ANS an ion channel specific for sodium found in the plasma membrane of all cells in
the body. allows sodium to enter the cell
Latest Study Updates
dendrites ANS branchlike parts of a neuron that are specialized to receive information
axon hillock ANS the conical region of a neuron's axon where it joins the cell body; typically the region
where nerve signals is generated.
myelin sheath ANS a layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly
greater transmission speed of neural impulses as the impulse hops from one node to the next
nodes of ranvier ANS gaps in the myelin sheath to which voltage-gated sodium channels are confined
axon terminals ANS branches at the end of the axon that contain tiny pouches, or sacs, called synaptic
vesicles
central nervous system ANS made up of the brain an the spinal cord
sensory neuron ANS neurons that carry incoming information from the sensory receptors to the brain and
spinal cord; afferent
interneuron ANS central nervous system neurons that internally communicate and intervene between the
sensory inputs and motor outputs
motor neuron ANS a neuron that sends an impulse to a muscle or gland, causing the muscle or gland to
react; efferent
peripheral nervous system ANS the sensory and motor neurons that connect the central nervous system to
the rest of the body; cranial and spinal nerves
afferent ANS conveying toward a center; sensory information from the PNS to the CNS
receptors ANS detect changes and respond to stimuli
, effectors ANS respond to efferent signals
efferent ANS conveying away from the center; motor commands from the CNS to the PNS
somatic sensory ANS carry signals from the muscles, bones, skin, joints
visceral sensory ANS carry signals from organs
somatic motor ANS carries signals to skeletal muscles
autonomous nervous ANS carry signals to smooth, cardiac muscles and glands; sympathetic and
parasympathetic
astrocytes ANS provide structural and metabolic support for neurons; form the blood brain barrier and scar
tissue; neuroglia of the CNS
microglia ANS act as phagocytes, eating damaged cells and bacteria, act as the brains immune system;
clean up cellular debris
oligodendrocytes ANS type of glial cell in the CNS that wrap axons in a myelin sheath
ependymal cells ANS line cavities of the brain and spinal cord, circulate cerebrospinal fluid; neuroglia of
the CNS
Schwann cells ANS supporting cells of the peripheral nervous system responsible for the formation of
myelin
satellite cells ANS surround neuron cell bodies in PNS; regulate the environment around the neuron
sodium leak channel ANS an ion channel specific for sodium found in the plasma membrane of all cells in
the body. allows sodium to enter the cell
