Psych 9A. Lec. 05 PP Slides: Brain and Nervous System
... • These cells have many functions, both during development and in supporting the function of the mature nervous system. • They may also constitute a separate, slow signal system. • Oligodendrocytes: produce myelin sheaths for neuron axons (white ...
... • These cells have many functions, both during development and in supporting the function of the mature nervous system. • They may also constitute a separate, slow signal system. • Oligodendrocytes: produce myelin sheaths for neuron axons (white ...
Name Date ______ Nervous System and Endocrine System Exam
... 1. The FUNCTION of the nervous and endocrine system is to _________________________ all life processes. 2. The electrochemical message that travels through the nervous system is called an ____________________. 3. The change in the environment that starts an impulse in a receptor is called a ________ ...
... 1. The FUNCTION of the nervous and endocrine system is to _________________________ all life processes. 2. The electrochemical message that travels through the nervous system is called an ____________________. 3. The change in the environment that starts an impulse in a receptor is called a ________ ...
The Function & Anatomy of Neurons What is a Neuron?
... The postsynaptic neuron has a concaved surface that creates a gap (synaptic cleft) between the synaptic bulb and the postsynaptic neuron. Once the impulse reaches the bulb the synaptic vesicles of the bulb move toward the bulb membrane. At the membrane the vesicles open and release the neurotran ...
... The postsynaptic neuron has a concaved surface that creates a gap (synaptic cleft) between the synaptic bulb and the postsynaptic neuron. Once the impulse reaches the bulb the synaptic vesicles of the bulb move toward the bulb membrane. At the membrane the vesicles open and release the neurotran ...
Chapter 9 Power Point
... of force a muscle or muscle group can exert against an opposing force. Absolute muscular strength -maximum force you are able to exert regardless of size, age, or ...
... of force a muscle or muscle group can exert against an opposing force. Absolute muscular strength -maximum force you are able to exert regardless of size, age, or ...
The Nervous System
... • Sodium-potassium pumps in the nerve cell membrane pumps sodium (Na+) ions out of the cell and potassium (K+) ions into the cell by means of active transport. • As a result, the inside of the cell contains more K+ ions and fewer Na+ ions than the ...
... • Sodium-potassium pumps in the nerve cell membrane pumps sodium (Na+) ions out of the cell and potassium (K+) ions into the cell by means of active transport. • As a result, the inside of the cell contains more K+ ions and fewer Na+ ions than the ...
Nervous System Part I Flashcards
... Found in the Central Nervous System (CNS); processes messages ...
... Found in the Central Nervous System (CNS); processes messages ...
Chapter 10
... 14. Define synapse. The ends of axons and dendrite are not directly connected to other neurons or effects. Instead, they terminate very close to them, leaving a space. The terminal end of the axon is called a presynaptic terminal and it communicates with a postsynaptic neuron. This “connection” is c ...
... 14. Define synapse. The ends of axons and dendrite are not directly connected to other neurons or effects. Instead, they terminate very close to them, leaving a space. The terminal end of the axon is called a presynaptic terminal and it communicates with a postsynaptic neuron. This “connection” is c ...
E4 - Neurotransmitters and Synapses - IBDPBiology-Dnl
... of the nervous system during pleasurable activities such as eating or having sex. ...
... of the nervous system during pleasurable activities such as eating or having sex. ...
A Ten Year Experience - Polio Outreach of Washington
... over into the central nervous system and infected the anterior horn cells. These individuals contracted "paralytic" polio. The distribution of weakness or paralysis depended on which anterior horn cells were involved. Spinal anterior horn cell involvement resulted in weakness or paralysis in the arm ...
... over into the central nervous system and infected the anterior horn cells. These individuals contracted "paralytic" polio. The distribution of weakness or paralysis depended on which anterior horn cells were involved. Spinal anterior horn cell involvement resulted in weakness or paralysis in the arm ...
Reflexes
... Motor neuron – conducts efferent impulses from the integration center to an effector Effector – muscle fiber or gland that responds to the efferent impulse ...
... Motor neuron – conducts efferent impulses from the integration center to an effector Effector – muscle fiber or gland that responds to the efferent impulse ...
Prac T12 - studylib.net
... At the site of an action potential, the membrane contains: an equal amount of positive and negative ions on either side of the membrane an equal amount of positive ions on either side of the membrane an excess of positive ions inside and an excess of negative ions outside an excess of negative ions ...
... At the site of an action potential, the membrane contains: an equal amount of positive and negative ions on either side of the membrane an equal amount of positive ions on either side of the membrane an excess of positive ions inside and an excess of negative ions outside an excess of negative ions ...
AP Psychology - Ms. Hofmann`s Website
... Peripheral Nervous system on this website. Read the two scenarios on the right that begin with, “It’s a nice sunny day…” Draw yourself in each of these situations and in the caption explain what is going on in your body. ...
... Peripheral Nervous system on this website. Read the two scenarios on the right that begin with, “It’s a nice sunny day…” Draw yourself in each of these situations and in the caption explain what is going on in your body. ...
ch. 48 Nervous System notes
... portions of the cerebral cortex – Linked to areas of cerebral cortex involved with complex learning, reasoning, and personality ...
... portions of the cerebral cortex – Linked to areas of cerebral cortex involved with complex learning, reasoning, and personality ...
The All or None Law - twynham a level pe
... muscle fibres. They relay information via afferent or sensory neurons concerning the state of muscle contraction and the length or extension of the muscle. When a muscle is stretched, the spindle is stretched and it sends an impulse to the spinal cord indicating how much and how fast the muscle has ...
... muscle fibres. They relay information via afferent or sensory neurons concerning the state of muscle contraction and the length or extension of the muscle. When a muscle is stretched, the spindle is stretched and it sends an impulse to the spinal cord indicating how much and how fast the muscle has ...
Iliopsoas Muscle Injury
... (blood clot) formation, grade III with severe tearing of the muscle, and grade IV where the there is a complete rupture of the tendon or muscle. Mild sprains usually resolve in about one week with rest. More severe sprains can result in severe pain and lameness that will not resolve without intensiv ...
... (blood clot) formation, grade III with severe tearing of the muscle, and grade IV where the there is a complete rupture of the tendon or muscle. Mild sprains usually resolve in about one week with rest. More severe sprains can result in severe pain and lameness that will not resolve without intensiv ...
PPT and questions for class today.
... either fires or it doesn’t; more stimulation does nothing. This is known as the “all-ornone” response. ...
... either fires or it doesn’t; more stimulation does nothing. This is known as the “all-ornone” response. ...
Chapter 15 Anatomy & Physiology
... photoreceptor, many layers of membranous discs are packed within the membrane sack. Photoreceptor pigments are located in these disks. When the photoreceptor is at rest, gated sodium channels are open in the outer segment causing depolarization at the synaptic end of the cell. Thus, in the dark, the ...
... photoreceptor, many layers of membranous discs are packed within the membrane sack. Photoreceptor pigments are located in these disks. When the photoreceptor is at rest, gated sodium channels are open in the outer segment causing depolarization at the synaptic end of the cell. Thus, in the dark, the ...
E4 - Neurotransmitters and Synapses - IBDPBiology-Dnl
... of the nervous system during pleasurable activities such as eating or having sex. ...
... of the nervous system during pleasurable activities such as eating or having sex. ...
11 - Karmayog .org
... This impulse is brought about by the movement of chemical ions either into or out of a neuron. - These ions have an electric charge this causes the flow of an electric current. - When it reaches a junction between two neurons (synapse). It causes the release of a neurotransmitters to stimulate the i ...
... This impulse is brought about by the movement of chemical ions either into or out of a neuron. - These ions have an electric charge this causes the flow of an electric current. - When it reaches a junction between two neurons (synapse). It causes the release of a neurotransmitters to stimulate the i ...
Neuron
... from the pre synaptic cell into a chemical signal that acts on the postsynaptic cell. Most synapses transmit information by releasing neurotransmitters. A synapse ( fig.) has the following structure: Fig.(8) Presynaptic axon terminal (terminal button) from which neurotransmitter is released, Pos ...
... from the pre synaptic cell into a chemical signal that acts on the postsynaptic cell. Most synapses transmit information by releasing neurotransmitters. A synapse ( fig.) has the following structure: Fig.(8) Presynaptic axon terminal (terminal button) from which neurotransmitter is released, Pos ...
Neuromuscular junction
A neuromuscular junction (sometimes called a myoneural junction) is a junction between nerve and muscle; it is a chemical synapse formed by the contact between the presynaptic terminal of a motor neuron and the postsynaptic membrane of a muscle fiber. It is at the neuromuscular junction that a motor neuron is able to transmit a signal to the muscle fiber, causing muscle contraction.Muscles require innervation to function—and even just to maintain muscle tone, avoiding atrophy. Synaptic transmission at the neuromuscular junction begins when an action potential reaches the presynaptic terminal of a motor neuron, which activates voltage-dependent calcium channels to allow calcium ions to enter the neuron. Calcium ions bind to sensor proteins (synaptotagmin) on synaptic vesicles, triggering vesicle fusion with the cell membrane and subsequent neurotransmitter release from the motor neuron into the synaptic cleft. In vertebrates, motor neurons release acetylcholine (ACh), a small molecule neurotransmitter, which diffuses across the synaptic cleft and binds to nicotinic acetylcholine receptors (nAChRs) on the cell membrane of the muscle fiber, also known as the sarcolemma. nAChRs are ionotropic receptors, meaning they serve as ligand-gated ion channels. The binding of ACh to the receptor can depolarize the muscle fiber, causing a cascade that eventually results in muscle contraction.Neuromuscular junction diseases can be of genetic and autoimmune origin. Genetic disorders, such as Duchenne muscular dystrophy, can arise from mutated structural proteins that comprise the neuromuscular junction, whereas autoimmune diseases, such as myasthenia gravis, occur when antibodies are produced against nicotinic acetylcholine receptors on the sarcolemma.