and lower extremities then back to the center (heart) again. I. CIRCULATORY SYSTEM the main transportation and cooling system of the body. responsible for transporting materials throughout the entire body. It transports nutrients‚ water‚ and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce. fluid distribution network PARTS OF THE CIRCULATORY SYSTEM: The Heart‚ The Blood‚ and The Blood vessels. HEART Heart weighs between
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Assignment 3 Written Essay Questions 1. a) We are able to experience different types of sensations because our nervous system encodes messages. German physiologist Johannes Muller in his doctrine of specific nerve energies described a kind of code which is anatomical. In his doctrine‚ Muller explains that different sensory modalities exist because signals received by the sense organs stimulate different nerve pathways that lead to different areas of the brain. For example‚ when the ear
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Parasympathetic VS Sympathetic The Autonomic Nervous System regulates cardiovascular‚ respiratory‚ digestive and urinary functions. The ANS studies have changed medicine practices. Before‚ the thought of a myocardial infarction patient living past five years was unheard of. Now doctors have learned to manipulate the ANS system with drugs that help to control blood pressure. The Autonomic Nervous System is composed of two divisions‚ Sympathetic and the parasympathetic divisions. They are involved
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Science Learning Modules Introduction to the Nervous System 1. The period after an initial stimulus when a neuron is NOT sensitive to another stimulus is the ____________. a) resting period b) repolarisation c) depolarisation d) absolute refractory period 2. The part of a neuron that conducts impulses away from its cell body is called a(n) _______________. a) axon b) dendrite c) neurolemma d) Schwann cell 3. Which ion channel opens in response to a change in membrane potential
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PHY2810 Physiology of Human Body Systems Activity of Gastrointestinal Smooth Muscle Worksheet Due by: 2 pm 30th March and 1st April Pre-practical Reading: Vander‚ 12th Edition: Section 6D.4 (pp 175-180)‚ Section 15.2 (pp 521-522)‚ Section 15.4 (pp 528-529‚ 536-538 & 542-543). Name: ________________________________ Student ID: _____________________________ Marks: ________/100______________________ Introduction Give a brief description in your own words of the objectives and aims
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The enteric nervous system is composed of the myenteric plexus (Auerbach’s plexus) and the submucosal plexus (Meissner’s plexus)‚ and it consists of a network of nervous fibers‚ ganglion cells (sensory and effectors neurons)‚ and interneurons richly interconnected by reflex arcs located in the wall of the gastrointestinal tract and directed
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auditory nerve and is composed of three divisions‚ the external ear‚ the middle ear‚ and the inner ear. The greater part of which is enclosed within the temporal bone. The ear is looked upon as a miniature receiver‚ amplifier and signal-processing system. The structure of the outer ear catching sound waves as they move into the external auditory canal. The sound waves then hit the eardrum and the pressure of the air causes the drum to vibrate back and forth. When the eardrum vibrates its neighbour
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located on top of your kidneys‚ and they perform an important management function within your body. Adrenal glands secrete the hormone known as cortisol‚ which is used in the regulation of blood pressure‚ heart activity‚ metabolism and the immune system. These glands also produce aldosterone‚ which regulates electrolytes and bodily fluids. Whenever you exercise or feel stressed‚ your adrenal glands kick into gear‚ producing various levels of adrenaline. When things go wrong with your adrenal glands
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maintain a constant condition in a biological system by means of automatic mechanisms that work against influences leaning towards disequilibrium. This action primarily aims to preserve relative constancy in the body when severe changes occur in the external environment‚ as it very important for the body to maintain homeostasis in order to survive. If conditions happen to drift too far‚ certain biochemical reactions are ignited
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Abstract Stress is a common condition‚ a response to a physical threat or psychological distress‚ that generates a host of chemical and hormonal reactions in the body. In essence‚ the body prepares to fight or flee‚ pumping more blood to the heart and muscles and shutting down all non-essential functions. As a temporary state‚ this reaction serves the body well to defend itself. However‚ when the stress reaction is attenuated‚ the normal physical functions that have been either exaggerated or shut
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