PhysioEX notes Autorhythmicity- heart’s ability to trigger its own contractions Phase O- a lot like depolarization in neuronal action potentials. Sodium channels open‚ increase of sodium INTO cell. Phase 1- sodium channels close‚ potassium channels close‚ decrease in potassium and sodium. Calcium channels open‚ increase of calcium into cell. Phase 2- Plateau phase‚ membrane still depolarized (contract). Potassium channels closed‚ L-type calcium channels stay open. Lasts 0.2 seconds/200
Premium Action potential
Introduction To Central Nervous System Neuropharmacology SPH 3014 Introduction to CNS • CNS is composed of brain and spinal cord. • Primary function are to coordinate and control the activity of other body systems. • Involved the synaptic processes which release different kind of neurotransmitters – Ach‚ NE‚ Serotonin‚ Dopamine etc – Some mental illnesses & pathological conditions are associated with abnormal changes in the amount or activity of neurotransmitter – Many drugs that
Premium Neuron Nervous system Acetylcholine
Where can you find each‚ and what does each do? Cardiac – found in the heart Smooth – internal organs and tubes‚ stomach‚ urinary bladder Skeletal – attached to bones 8. What controls the contraction of the different types of muscle? Autonomic innervations or spontaneously 9. Describe the arrangement of muscle fibers to make a muscle. Cell membrane called sarcolemma and cytoplasm called sarcoplasm. Arranged with their long axes in parallel. Each fiber is sheath in connective tissue
Premium Myosin Skeletal muscle Muscle contraction
General Psychology Core Review Questions Quiz #1 Spring 2013 □ To get the most from this study guide‚ write out both the questions and answers‚ then “test yourself” by reading each question and reciting answering from memory. Allow yourself enough time to complete the questions AND to study the answers. □ For 3% extra credit (added to Course Grade)‚ answer each of the questions and submit it on the day of the quiz. Do not submit unfinished work. Incomplete work with unanswered questions
Premium Nervous system Neuron Brain
Fisher Syndrome is the patients are affected by paralysis in the head‚ consequently resulting in difficulty controlling the eye muscles and balance. These patients have abnormal muscle coordination‚ paralysis of the eye muscles‚ absence of tendon reflexes‚ generalized muscle weakness and respiratory failure. They will begin to recover in as little as two to four weeks after the onset of symptoms and may be complete within six months. They rarely
Premium Nervous system
instructions from the brain that allow the muscles and orgasms to respond. When it comes to the brain a part called the hypothalamus controls our motivated behaviour such as sex drive or hunger‚ it also plays a part in maintaining a connection with the autonomic nervous system in order to receive information about the function of our internal organs which helps to improve their regulation. However its most important job is to assess levels of hormones in our body and to send that information further to the
Premium Crime Criminology Sociology
What makes a neuron different from other cells? What is plasticity? The NERVOUS SYSTEM 28 What are the Central Nervous System and the Peripheral Nervous System? What are the autonomic and somatic branches of the peripheral nervous system? What are the sympathetic and parasympathetic branches of the autonomic nervous system? What bodily functions are associated with each? 29 What is a simple reflex pathway? Sensory neurons? Motor neurons? Interneurons? The BRAIN 30 How are the functions
Premium Answer Question Learning
field of psychology even to this day. Apart from this‚ he also provided psychological explanations for various somatic illnesses. Thus‚ he was able to link the physical and psychological aspects of various illnesses. Rene Descartes (1596-1650) proposed models to explain animal and human behavior. He proposed theories linking the mind and body and explanations for motor behavior (reflexes). He was a pioneer in identifying the mind with consciousness and self-awareness. He was also able to differentiate
Premium Psychology
Human Biology 3A Notes CHAPTER 4: Chemical Messengers Homeostasis: the maintenance of a constant internal environment Homeostasis ensures that the fluid environment of the cells: • Contains the optimum concentration of nutrients‚ ions‚ gases and water • Stays at a constant temperature – the optimum temperature for normal cell functioning • Is maintained at the optimum pressure Feedback system: Negative feedback system: Negative feedback: Positive feedback: A situation where the response toa
Premium Brain Central nervous system Neuron
cord. The dorsal portion of the inferior trunk then becomes the medial cord‚ and the posterior portion of all three trunks come together and form the posterior cord. Moving distally‚ the cords separate into terminal branches‚ which attend to both autonomic and
Premium Brachial plexus