Biology 231
... saltatory conduction – occurs along myelinated axons depolarization leaps from one node of Ranvier to the next the entire axon does not completely depolarize impulse is conducted very rapidly opening ion channels only at nodes means less Na+ and K+ pass through membrane and less ATP (energy) is used ...
... saltatory conduction – occurs along myelinated axons depolarization leaps from one node of Ranvier to the next the entire axon does not completely depolarize impulse is conducted very rapidly opening ion channels only at nodes means less Na+ and K+ pass through membrane and less ATP (energy) is used ...
chapter 43 The Nervous System
... pulling K+ ions back inside the cell. The balance between diffusional force -and the electrical force produces ""equilibrium potential (table 43.1). By relating the work cby each type of force, we can derive a quantitative expressz for this equilibrium potential called the Nernst equation. :2._ assu ...
... pulling K+ ions back inside the cell. The balance between diffusional force -and the electrical force produces ""equilibrium potential (table 43.1). By relating the work cby each type of force, we can derive a quantitative expressz for this equilibrium potential called the Nernst equation. :2._ assu ...
Slide ()
... The motor circuit for horizontal saccades. A. Eye velocity component. Long-lead burst neurons relay signals from higher centers to the excitatory burst neurons. The eye velocity component arises from excitatory burst neurons in the paramedian pontine reticular formation that synapse on motor neurons ...
... The motor circuit for horizontal saccades. A. Eye velocity component. Long-lead burst neurons relay signals from higher centers to the excitatory burst neurons. The eye velocity component arises from excitatory burst neurons in the paramedian pontine reticular formation that synapse on motor neurons ...
The Sensory System
... buds and the taste cells through microvilli project into a taste pore. There are non-receptor basal cells which are located on the basement membrane which do not project into the taste pore. These basal cells differentiate through a series of morphological steps into a mature taste cell. The taste c ...
... buds and the taste cells through microvilli project into a taste pore. There are non-receptor basal cells which are located on the basement membrane which do not project into the taste pore. These basal cells differentiate through a series of morphological steps into a mature taste cell. The taste c ...
Nerve Cells and Nerve Impulses
... The nervous system is made up of nerves. A nerve is a bundle of nerve cells. A nerve cell that carries messages is called a neuron ( Figure 1.1). The messages carried by neurons are called nerve impulses. Nerve impulses can travel very quickly because they are electrical impulses. Think about flippi ...
... The nervous system is made up of nerves. A nerve is a bundle of nerve cells. A nerve cell that carries messages is called a neuron ( Figure 1.1). The messages carried by neurons are called nerve impulses. Nerve impulses can travel very quickly because they are electrical impulses. Think about flippi ...
PDF
... complex interaction of signalling cascades and transcriptional networks in the developing craniofacial region. Pax9 and Osr2 have previously been implicated in palate formation, but little is known about how these molecular components interact within the greater regulatory network. Now, on p. 4709, ...
... complex interaction of signalling cascades and transcriptional networks in the developing craniofacial region. Pax9 and Osr2 have previously been implicated in palate formation, but little is known about how these molecular components interact within the greater regulatory network. Now, on p. 4709, ...
Nervous System Outline
... 1. Located within your vertebrae is the other part of your CNS, your spinal cord. It has the job of sending messages up towards the brain (this would be sensory information) and movement messages down away from the brain (this would be motor information). 2. Reflex - A reflex is an unconscious, fast ...
... 1. Located within your vertebrae is the other part of your CNS, your spinal cord. It has the job of sending messages up towards the brain (this would be sensory information) and movement messages down away from the brain (this would be motor information). 2. Reflex - A reflex is an unconscious, fast ...
by David Zimmerman The ultimate in nerve regeneration
... scar formation as a variable in their work with another animal, the thirteen-lined ground s q u i r r e l . T h e s e s q u i r r e l s are l o n g a n d profound hibernators. T h e y are so damped d o w n metabolically w h e n hibernating that they do not synthesize scar tissue in response to injur ...
... scar formation as a variable in their work with another animal, the thirteen-lined ground s q u i r r e l . T h e s e s q u i r r e l s are l o n g a n d profound hibernators. T h e y are so damped d o w n metabolically w h e n hibernating that they do not synthesize scar tissue in response to injur ...
Chapter 6
... • Photoreceptor layer - Rod and cone cells specialized to transduce light • Rods - predominate in peripheral areas and cones - are densely concentrated in the fovea - the center of the visual field • Bipolar cell layer - The cells in this layer establish pathways for nerve impulses. Horizontal cells ...
... • Photoreceptor layer - Rod and cone cells specialized to transduce light • Rods - predominate in peripheral areas and cones - are densely concentrated in the fovea - the center of the visual field • Bipolar cell layer - The cells in this layer establish pathways for nerve impulses. Horizontal cells ...
Lec 7 Lab Demo Handout
... release acetylcholine (ACh) that is received by sensory receptors of nicotinic receptors on the alpha motor neurons. Alpha motor neurons send an impulse down their axons via the ventral root of the spinal cord. Subsequently alpha motor neurons release ACh from their axon terminal knobs at the neurom ...
... release acetylcholine (ACh) that is received by sensory receptors of nicotinic receptors on the alpha motor neurons. Alpha motor neurons send an impulse down their axons via the ventral root of the spinal cord. Subsequently alpha motor neurons release ACh from their axon terminal knobs at the neurom ...
08 - Pierce College
... 3. The nervous system is divided into which two units? a. Sensory and motor division b. Central nervous system and autonomic nervous system c. Peripheral nervous system and central nervous system d. Somatic and autonomic nervous system 4. The sympathetic and parasympathetic branches are the subdivis ...
... 3. The nervous system is divided into which two units? a. Sensory and motor division b. Central nervous system and autonomic nervous system c. Peripheral nervous system and central nervous system d. Somatic and autonomic nervous system 4. The sympathetic and parasympathetic branches are the subdivis ...
Neurons and Nervous Systems
... Potassium channels are open in the resting membrane and are highly permeable to K+ ions—allow leak currents K+ ions diffuse out of the cell along the concentration gradient and leave behind negative charges within the cell. K+ ions diffuse back into the cell because of the negative electrical potent ...
... Potassium channels are open in the resting membrane and are highly permeable to K+ ions—allow leak currents K+ ions diffuse out of the cell along the concentration gradient and leave behind negative charges within the cell. K+ ions diffuse back into the cell because of the negative electrical potent ...
Spasticity
... Spasticity is a disabling complication of spinal cord injury or stroke. Spasticity is defined as a symptom of the upper motor neuron syndrome characterized by an exaggeration of the stretch reflex secondary to hyperexcitability of spinal reflexes. In this condition, the muscles are stiff or rigid, which ...
... Spasticity is a disabling complication of spinal cord injury or stroke. Spasticity is defined as a symptom of the upper motor neuron syndrome characterized by an exaggeration of the stretch reflex secondary to hyperexcitability of spinal reflexes. In this condition, the muscles are stiff or rigid, which ...
Peripheral Nervous System
... A. Innervation of skeletal muscles- each muscle fiber is associated with a neuromuscular junction (synapse between a motor axon and muscular tissue). A motor neuron branches in order to innervate individual skeletal muscle fibers and is called a motor unit. At the synapse the axon releases synaptic ...
... A. Innervation of skeletal muscles- each muscle fiber is associated with a neuromuscular junction (synapse between a motor axon and muscular tissue). A motor neuron branches in order to innervate individual skeletal muscle fibers and is called a motor unit. At the synapse the axon releases synaptic ...
neuro jeopardy
... Neuroglial cells that line the ventricles of the brain are the ______. a. astrocytes b. ependymal cells c. microglia d. Schwann cells BACK TO GAME ...
... Neuroglial cells that line the ventricles of the brain are the ______. a. astrocytes b. ependymal cells c. microglia d. Schwann cells BACK TO GAME ...
Slide 1
... the next. Nerve signals have to jump across a tiny gap (synaptic cleft). To get across the gap they have to change from electrical signals into chemical signals (neurotransmitters) then back into electrical signals. ...
... the next. Nerve signals have to jump across a tiny gap (synaptic cleft). To get across the gap they have to change from electrical signals into chemical signals (neurotransmitters) then back into electrical signals. ...
Session 2 Neurons - Creature and Creator
... This slide gives you a sense of the many different kinds of neurons in the nervous system. The drawings were made with a calligraphy brush. The Chinese name of a neuron is shén jīng yuán – this may derive from a combination characters originally meaning “primary soul channel.” However, both translat ...
... This slide gives you a sense of the many different kinds of neurons in the nervous system. The drawings were made with a calligraphy brush. The Chinese name of a neuron is shén jīng yuán – this may derive from a combination characters originally meaning “primary soul channel.” However, both translat ...
The human body contains more than 650 individual muscles which
... tissues has the ability to contract, which then allows body movements and functions. There are two types of muscles in the system and they are the involuntary muscles, and the voluntary muscles. The muscle in which we are allow to control by ourselves are called the voluntary muscles and the ones we ...
... tissues has the ability to contract, which then allows body movements and functions. There are two types of muscles in the system and they are the involuntary muscles, and the voluntary muscles. The muscle in which we are allow to control by ourselves are called the voluntary muscles and the ones we ...
Slide 1
... • A single neuron may receive input from many synapses. • Neurons “decide” whether to generate an action potential by adding up excitatory and inhibitory input. ...
... • A single neuron may receive input from many synapses. • Neurons “decide” whether to generate an action potential by adding up excitatory and inhibitory input. ...
The Nervous System and The Brain
... Each neuron consists of a cell body (Soma) and one or more branching fibers. The fibers are of two types: Dendrites – Receive information from sensory receptors, or other neurons Axons – Pass information along to other neurons ***Dendrites – Short; Axons – Long *** ...
... Each neuron consists of a cell body (Soma) and one or more branching fibers. The fibers are of two types: Dendrites – Receive information from sensory receptors, or other neurons Axons – Pass information along to other neurons ***Dendrites – Short; Axons – Long *** ...
Use of rabies virus as a transneuronal tracer of neuronal
... infiltration with rabies antibodies as soon as possible, to prevent virus entry! ...
... infiltration with rabies antibodies as soon as possible, to prevent virus entry! ...
The Nervous System
... An impulse begins when a neuron is stimulated by the environment or by another neuron. It uses Sodium and Potassium Ions to move the impulse (action potential) ...
... An impulse begins when a neuron is stimulated by the environment or by another neuron. It uses Sodium and Potassium Ions to move the impulse (action potential) ...
Chapter 22 The Nervous System Nervous System - Function 6/1/2013
... An impulse begins when a neuron is stimulated by the environment or by another neuron. It uses Sodium and Potassium Ions to move the impulse (action potential) ...
... An impulse begins when a neuron is stimulated by the environment or by another neuron. It uses Sodium and Potassium Ions to move the impulse (action potential) ...
Sensory Organs
... nerve fibers remained in a peripheral position. This provided protection for nerve cells, which do not regenerate. Central migration did not occur for the nerve cell bodies of Cranial Nerve I (olfactory). Cell bodies of Cranial Nerve I are found in the mucous membrane of the nasal cavity. This locat ...
... nerve fibers remained in a peripheral position. This provided protection for nerve cells, which do not regenerate. Central migration did not occur for the nerve cell bodies of Cranial Nerve I (olfactory). Cell bodies of Cranial Nerve I are found in the mucous membrane of the nasal cavity. This locat ...