central computer that controls all the functions of your body‚ then the nervous system is like a network that relays messages back and forth from it to different parts of the body. It does this via the spinal cord‚ which runs from the brain down through the back and contains threadlike nerves that branch out to every organ and body part. When a message comes into the brain from anywhere in the body‚ the brain tells the body how to react. For example‚ if you accidentally touch a hot stove‚ the nerves
Premium Brain Central nervous system Nervous system
(Total: 6 marks) 16.2 Nervous coordination A. Questions 1. (a) motor neurone (1 mark) (1 mark) (b) A – cell body (1 mark) B – axon / nerve fibre (1 mark) C – myelin sheath (1 mark) (c) C is made of fat. (1 mark) It prevents the spread of nerve impulses and helps speed up the rate of transmission of nerve impulses. (1 mark) (d) X is an effector. (1 mark) e.g. muscle / gland (1 mark) (Total: 9 marks) 2. (a) Central nervous system (1 mark) (b) brain (1
Premium Nervous system Neuron Brain
The Nervous System By: Brooklynne Harris Scenario A loud crashing sound causes everyone in the room to quickly turn their heads toward the source of the noise. Describe the path of the signal through the human nervous system from initial stimulus of sound to the response of turning the head. Crash and then turn of the head The Journey The loud sound that the person heard is the stimulus. In order to hear a sound‚ sound waves have to be generated and sent to the cochlea in the inner ear. From
Premium Brain Auditory system Nervous system
Page 1 of 5 The Brain and the Nervous System The human brain and the nervous system are essential for human life. They run the autonomic and conscious processes of the body. All of the body organs and processes independent that not conscious of are controlled by the brain. Being one of the most important of the body when issues there must be immediate solutions or the entire body will shut down. The brain is fragile and has huge functions in the body so it must be taken care of‚ but if not
Premium Brain Nervous system Neuron
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
Premium Blood Heart
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
Premium Reinforcement Sensory system Perception
Lab IX: Nervous System Histology and Spinal Cord Part II: Neurons and nerve struture 1.) There are three types of neurons. The first is the multipolar‚ which is the most common‚ and they are found as motor neurons and interneurons throughout the central nervous system. The second type of neuron is the unipolar neuron‚ which are also called psuedounipolar neurons. They are found as spinal and cranial sensory neurons. The last neuron is the bipolar neuron. They are only found in olfactory‚ visual
Premium Neuron Nervous system Axon
SIM KIAN STUDENT NO.10 028112 SUBMITTED DATE: 31 MARCH 2011 1 1 2 3 4 5 In its never-ending quest to maintain homeostasis‚ the human body responds to stress‚ physiologic or psychological‚ with a chain reaction that involves the central nervous system and hormones that affect the entire body. Magnitude and duration of the stress determine just how the body will react. It is important to understand metabolic changes that take place in reaction to stress‚ both in uncomplicated
Premium Nutrition Metabolism Psychology
animals’ and humans’ nervous systems is a necessary process to maximise the chances of survival. Neuronal and behavioural changes are closely linked to the environment surrounding animals and humans‚ as well as to their lifestyles. This essay will present some evidence that the nervous system of animals and humans have evolved as to maximize survival‚ by looking at specific elements of the nervous system on a cellular level‚ within the brain regions‚ through functioning pathways‚ systems and finally‚ behaviour
Premium Nervous system Brain Neuron
surrounds the entire nerve trunk and gives off vascular connective tissue septa that traverse the nerve and separate fascicles from one another. | | Single myelinated axon | Normal nerve | Axons thicker than one micron in the CNS and peripheral nervous system (PNS) are myelinated. Myelin is a spiral sheet of cell membrane wrapped around the axon. In the CNS‚ myelin is produced by oligodendroglial cells and in the PNS by Schwann cells. Each oligodendrocyte makes multiple segments of myelin that wrap
Premium Nervous system Action potential Axon