Chapter 9: Muscles and Muscle Tissue‚ Lecture Outline: I. Overview of Muscle Tissues (pp. 276–278; Table 9.1) A. Types of Muscle Tissue (p. 277; Table 9.1) 1. Skeletal muscle is associated with the bony skeleton and consists of large cells that bear striations and are under voluntary control. 2. Cardiac muscle occurs only in the heart and consists of small cells that are striated and under involuntary control. 3. Smooth muscle is found in the walls of hollow organs and
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April 17‚ 2012 Acetylcholine Acetylcholine better known as ACh is a neurotransmitter that is produced by cholinergic neurons. Nerves that rely on Ach are classified as cholinergic nerves. Acetylcholine is found in both the peripheral nervous system and the central nervous system. Acetylcholine can also be found in the autonomic nervous system and is the only neurotransmitter used in motor division of the somatic nervous system. In the peripheral nervous system acetylcholine plays a role in
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PSYCHOLOGY Scenario 2 You are driving to the movies with your friends on a Friday night. You have just left Dairy Queen™ with a huge Blizzard®. Please be able to explain: Seven parts of the brain that you are using. The functions of the structures you listed. Neurotransmitters you are using and their function(s). Basal Ganglia – Driving (planning and indicating movement) Hippo Campus – Remembering where the movies are and friends. (Remember place‚ relationships and events) Hypothalamus
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on smooth muscle Introduction In the following experiment‚ the key objective is to compare the mechanical changes in tonic force by longitudinal smooth muscle after the addition of different concentrations of the drugs noradrenaline and acetylcholine. Peristalsis is the wave of muscle contractions that allow circular muscles to constrict the gut and longitudinal muscles to shorten it in an attempt to move the food bolus towards the rectum. A series of dilutions were prepared for both drugs
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Chaper 11 1. Define responsiveness‚ conductivity‚ contractility‚ extensibility‚ and elasticity. State why each of these properties is necessary for muscle function. a. Responsiveness- is a property of all living cells- Muscle and nerve cells have developed this property to the highest degree. When stimulated by chemical signals‚ stretch‚ and other stimuli‚ muscle cells respond with electrical changes across the plasma membrane. b. Conductivity- Stimulation of a muscle cell produces
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uses synapses to connect the muscular system with the muscular system. A nerve impulse is sent from the brain down to the motor neuron by way of the axon. Acetylcholine is released after the vesicles break open. Sodium channels are opened from Acetylcholine that bonds to the Acetylcholine receptors. Depolarization happens when Acetylcholine causes an area of the muscle fiber to become a little more positive when it leaves the nerve and docks on receptors in the muscle membrane. Large amounts of
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Attach copies of your experimental recordings showing the response of the ileum to the direct addition of noradrenaline and of acetylcholine to the tissue bath. 1) What was the final bath concentration of noradrenaline you used? Briefly describe the response of the ileum to the direct addition of noradrenaline. 2) What was the final bath concentration of acetylcholine you used? Briefly describe the response of the ileum to the direct addition of
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Report Pre-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. The parasympathetic nervous system releases __________ to affect heart rate. Your answer : a. norepinephrine Correct answer: d. acetylcholine 2. A cholinergic drug that worked the same as acetylcholine would You correctly answered: c. be an agonist and decrease heart rate. 3. Norepinephrine affects the heart rate by You correctly answered: a. increasing the rate of depolarization and increasing the frequency of action
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Q1 Muscle contraction can be understood as the consequence of a process of transmission of action potentials from one neuron to another. A chemical called acetylcholine is the neurotransmitter released from the presynaptic neuron. As the postsynaptic cells on the muscle cell membrane receive the acetylcholine‚ the channels for the cations sodium and potassium are opened. These cations produce a net depolarization of the cell membrane and this electrical signal travels along the muscle fibers. Through
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Jennifer Ingrum 02/01/11 The Central Nervous System or (CNS) is located in the center portion of the body as its name implies. The (CNS) is made up of the brain and the spinal cord. Our brain is in control of many very important body functions and sensations like these for example: sleep‚ muscle movement‚ memory‚ sexual activity‚ emotions‚ hunger and thirst. Our spinal cord extends several types of nerve fibers from the brain acts like a switching and relay terminal for the peripheral nervous
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