Nerve Cells
... • What is the chief excitatory neurotransmitter in the mammalian brain? The chief inhibitory neurotransmitter? What vitamin is required for the synthesis of the chief inhibitory brain neurotransmitter? What is the role of PyP in catecholamine synthesis? What is the role of tetrahydrobiopterin in sec ...
... • What is the chief excitatory neurotransmitter in the mammalian brain? The chief inhibitory neurotransmitter? What vitamin is required for the synthesis of the chief inhibitory brain neurotransmitter? What is the role of PyP in catecholamine synthesis? What is the role of tetrahydrobiopterin in sec ...
36.1 The Nervous System Neurons: Basic units of
... The pump moves three sodium ions out of the cell for every tw0 potassium ions it pumps into the cell. This moves the negative charge down the axon to the next cell. A reflex is an involuntary action that does not involve conscious control by the brain. You cannot stop it. ...
... The pump moves three sodium ions out of the cell for every tw0 potassium ions it pumps into the cell. This moves the negative charge down the axon to the next cell. A reflex is an involuntary action that does not involve conscious control by the brain. You cannot stop it. ...
Cell types: Muscle cell Adipocyte Liver cell Pancreatic cell Example
... contain Nissl substance and is called an axon hillock. The plasma membrane of the axon is called the axolemma, and the cytoplasm contained in it is called axoplasm. The axoplasm does not contain the Nissl substance or Golgi apparatus, but it does contain mitochondria, microtubules, and neurofilament ...
... contain Nissl substance and is called an axon hillock. The plasma membrane of the axon is called the axolemma, and the cytoplasm contained in it is called axoplasm. The axoplasm does not contain the Nissl substance or Golgi apparatus, but it does contain mitochondria, microtubules, and neurofilament ...
The Chemistry of the Brain
... 5) This impulse is sent by MOTOR NEURONS to the hand muscles (the effectors) via the ...
... 5) This impulse is sent by MOTOR NEURONS to the hand muscles (the effectors) via the ...
My Reaction Test Score = Neural Transmission
... reflexes. The signal would travel at near the speed of light. Response time would be nearly instantaneous. The signals do have an electrical nature and messages can be initiated by electrical shocks. Rather than moving along a wire like electricity, the signals in your nervous system move by changin ...
... reflexes. The signal would travel at near the speed of light. Response time would be nearly instantaneous. The signals do have an electrical nature and messages can be initiated by electrical shocks. Rather than moving along a wire like electricity, the signals in your nervous system move by changin ...
Paper I
... 3. What does dorsal mean, and what is its opposite? 4. If the two structures are both on the left side of the body, they are If one is on the left and the other is on the right, they are ...
... 3. What does dorsal mean, and what is its opposite? 4. If the two structures are both on the left side of the body, they are If one is on the left and the other is on the right, they are ...
Chapter 7: the Nervous System
... • Cells of the central nervous system have a very limited ability to regenerate themselves • The cells themselves are soft and easily damaged (your brain has the consistency of tofu) • The blood-brain barrier refers to the fact that capillaries in the brain are less permeable than those in other par ...
... • Cells of the central nervous system have a very limited ability to regenerate themselves • The cells themselves are soft and easily damaged (your brain has the consistency of tofu) • The blood-brain barrier refers to the fact that capillaries in the brain are less permeable than those in other par ...
Lecture Slides - Austin Community College
... The human body contains billions of neurons Basic structural unit of the nervous system • Specialized cells conduct electrical impulses along the plasma membrane • Nerve impulses are called action potentials Other special characteristics • Longevity – can live and function for a lifetime • Do not di ...
... The human body contains billions of neurons Basic structural unit of the nervous system • Specialized cells conduct electrical impulses along the plasma membrane • Nerve impulses are called action potentials Other special characteristics • Longevity – can live and function for a lifetime • Do not di ...
Nerve activates contraction
... Axons end in axonal terminals Axonal terminals contain vesicles that contain chemicals called neurotransmitters When the impulses reach the axonal terminals, they stimulate the release of neurotransmitters into the extracellular space. ...
... Axons end in axonal terminals Axonal terminals contain vesicles that contain chemicals called neurotransmitters When the impulses reach the axonal terminals, they stimulate the release of neurotransmitters into the extracellular space. ...
Neurophysiology Worksheet
... a neurotransmitters held within the presynaptic cell. These neurotransmitters enter the synaptic cleft and bind to receptors on the post synaptic cell. These post synaptic cell receptors are typically chemically gated Na+ or Cl- channels. These chemically gated channels eventually lead to depolariza ...
... a neurotransmitters held within the presynaptic cell. These neurotransmitters enter the synaptic cleft and bind to receptors on the post synaptic cell. These post synaptic cell receptors are typically chemically gated Na+ or Cl- channels. These chemically gated channels eventually lead to depolariza ...
the nervous system
... polarized cell: resting membrane potential (RMP): stimulus: electrically sensitive gated Na channels: Na inflow: depolarisation : threshold potential: positive feedback: ...
... polarized cell: resting membrane potential (RMP): stimulus: electrically sensitive gated Na channels: Na inflow: depolarisation : threshold potential: positive feedback: ...
Nervous System
... Bilateral symmetry usually demonstrate cephalization, nervous system concentration in the head and centralization, presence of CNS and PNS Platyhelminthes with nerve cords to control animal movements is simplest Subsequent phyla see an increase in neuron number and segmentation ...
... Bilateral symmetry usually demonstrate cephalization, nervous system concentration in the head and centralization, presence of CNS and PNS Platyhelminthes with nerve cords to control animal movements is simplest Subsequent phyla see an increase in neuron number and segmentation ...
Power Point CH 14
... the ventricles of the brain and the central canal of the spinal cord • In conjunction with other glial cells, the ependymal cells produce cerebral spinal fluid (CSF) and form the choroid plexus ...
... the ventricles of the brain and the central canal of the spinal cord • In conjunction with other glial cells, the ependymal cells produce cerebral spinal fluid (CSF) and form the choroid plexus ...
Nerve Cells - Dr Magrann
... Functional Classification of Neurons Neurons are grouped functionally according to the direction the nerve impulse travels relative to the CNS. Sensoroy Neurons (afferent neurons) transmit impulses toward the CNS. They originate in the PNS and terminate in the CNS. Motor Neurons (efferent neur ...
... Functional Classification of Neurons Neurons are grouped functionally according to the direction the nerve impulse travels relative to the CNS. Sensoroy Neurons (afferent neurons) transmit impulses toward the CNS. They originate in the PNS and terminate in the CNS. Motor Neurons (efferent neur ...
ACTION POTENTIAL Action potential
... • Action potential depolarizes pre-synaptic membrane of synaptic terminal – Ca2+ influx through voltage gated Ca channels • Ca2+ activates proteins (stenine and neurine) attached to vesicles (containing a neurotransmitter) – pulling the vesicles to the membrane, making them to fuse with the membrane ...
... • Action potential depolarizes pre-synaptic membrane of synaptic terminal – Ca2+ influx through voltage gated Ca channels • Ca2+ activates proteins (stenine and neurine) attached to vesicles (containing a neurotransmitter) – pulling the vesicles to the membrane, making them to fuse with the membrane ...
Neural Tissue – Chapter 12
... by continuous propagation (unmyelinated axons) or by salutatory propagation (myelinated axons). A. Continuous Propagation The basic mechanism by which an action potential is propagated along an unmyelinated axon It occurs at a speed of 1 m/s The action potential begins at the initial segment c ...
... by continuous propagation (unmyelinated axons) or by salutatory propagation (myelinated axons). A. Continuous Propagation The basic mechanism by which an action potential is propagated along an unmyelinated axon It occurs at a speed of 1 m/s The action potential begins at the initial segment c ...
The Nervous System
... Developmental Aspects of the Nervous System A. The nervous system begins to form in the first month of embryonic development. Therefore maternal and environmental factors may impair brain development. Mothers that smoke impair the body’s ability to carry oxygen sufficiently which increased the chan ...
... Developmental Aspects of the Nervous System A. The nervous system begins to form in the first month of embryonic development. Therefore maternal and environmental factors may impair brain development. Mothers that smoke impair the body’s ability to carry oxygen sufficiently which increased the chan ...
ActionPotentialWebquestCompleteGarrettIan
... 2. What role does the sodium/potassium pump (Na+/K+ pump) have in creating resting potential? 3. What happens to the inside of the cell when sodium ions flood into the cell? 4. After sodium ions have flooded into the cell and the sodium gates close, what happens to the potassium ions? 5. How does a ...
... 2. What role does the sodium/potassium pump (Na+/K+ pump) have in creating resting potential? 3. What happens to the inside of the cell when sodium ions flood into the cell? 4. After sodium ions have flooded into the cell and the sodium gates close, what happens to the potassium ions? 5. How does a ...
Nerve Cells and Nerve Impulses
... -Na+ and K+ channels in axon are voltage gated. -Action Potential are triggered by positive change in membrane potential. -Threshold potential: 10 mV (from -70 mV to -60 mV) -Size of action potential: 120 mV: from -70 mV to + 50 mV (all or nothing) -Action potentials are triggered in the axon hilloc ...
... -Na+ and K+ channels in axon are voltage gated. -Action Potential are triggered by positive change in membrane potential. -Threshold potential: 10 mV (from -70 mV to -60 mV) -Size of action potential: 120 mV: from -70 mV to + 50 mV (all or nothing) -Action potentials are triggered in the axon hilloc ...
chapter 48
... Astrocytes: are found within the CNS and provide structural and metabolic support as well as forming of tight junctions to help form the blood-brain barrier. They also communicate with one another via chemical signals. ...
... Astrocytes: are found within the CNS and provide structural and metabolic support as well as forming of tight junctions to help form the blood-brain barrier. They also communicate with one another via chemical signals. ...
Node of Ranvier
The nodes of Ranvier also known as myelin sheath gaps, are the gaps (approximately 1 micrometer in length) formed between the myelin sheaths generated by different cells. A myelin sheath is a many-layered coating, largely composed of a fatty substance called myelin, that wraps around the axon of a neuron and very efficiently insulates it. At nodes of Ranvier, the axonal membrane is uninsulated and, therefore, capable of generating electrical activity.