M14_MARI6128_10_SE_CH14.QXD 1/19/11 5:58 PM Page 193 NAME_________________________________ LAB TIME/DATE ________________________ EXERCISE R E V I E W S H E E T 14 Key: a. b. endomysium epimysium fascicle fiber myofibril myofilament perimysium sarcolemma sarcomere sarcoplasm tendon Microscopic Anatomy and Organization of Skeletal Muscle Skeletal Muscle Cells and Their Packaging into Muscles 1. Use the items in the key to correctly identify the structures described below
Premium Muscle Skeletal muscle Myosin
constricts/lengthens) xi. Alternates contracting and releasing xii. Peristalsis mixing and moving 1. Controlled by Autonomic Nervous System a. Involuntary ii. iii. b. Controlled by autonomic neuron 2. Vericosities: swollen area; similar to axon terminal does not dead end a. Has synaptic vesicles which could contain ACH or Norepinephrine b. Neurotransmitter can be excitatory (cause contraction) or inhibitory (cause it to relax) *BE ABLE TO COMPARE SKELETAL AND SMOOTH MUSCLE!! b. Contraction
Premium Muscle Muscular system Cardiac muscle
neurons are alike‚ but they all have a cell body‚ dendrites‚ and an axon. The cell body contains the nucleus that manufactures what neurons need for growth and maintenance. Dendrites receive information and send it on to the cell body. The axon carries information away from the cell body and on to other cells. A myelin sheath‚ which covers the axon‚ is semipermeable‚ meaning that certain substances can pass into and out of the axon. The nerve disorder called multiple sclerosis occurs when there
Premium Psychology Cognition Mind
components; dendrites‚ the soma or cell body‚ the axon‚ and terminal fibers.. Imagine a big tree suspended in mid-air. This tree has a dense network of roots which join on to a bulbous lower trunk. Above this fat lower trunk is a long thin upper trunk which ends with a wispy network of branches. In this pictured analogy of the neuron or nerve cell‚ the roots of the tree are the dendrites‚ the lower bulbous trunk is the soma‚ the long upper trunk is the axon‚ and the topmost branches are the terminal fibres
Premium Neuron Nervous system
Chapter 48 Nervous Systems Lecture Outline Overview: Command and Control Center The human brain contains an estimated 1011 (100 billion) neurons. Each neuron may communicate with thousands of other neurons in complex information-processing circuits. Recently developed technologies can record brain activity from outside the skull. One technique is functional magnetic resonance imaging (fMRI)‚ which reconstructs a 3-D map of the subject’s brain activity. The results of brain imaging and other
Premium Neuron Action potential
Schwann Cells: larger axons of peripheral neurons enclosed in sheaths Neurofibrils: thin‚ long fibrils that run through body of neuron and extends to axon and dendrites; gives neuron shape and support Astrocytes: cells found between neurons; provide structural support 2. What is the difference between dendrites and axons? Dendrites: short‚ branched fibers and neurons main receptive surface; carries impulses to the cell body; usually multiple dendrites per cell body Axon: slight elevation of
Premium
Chapter 2 The Brain and Behavior Chapter Preview • This chapter will cover the following domains: • The nervous system • Neurons • Structures of the brain and their functions • Brain damage‚ plasticity‚ and repair • Genetics and behavior • As with chapter 1‚ this presentation will serve as a study guide‚ highlighting the most important concepts which you should study for your midterm by reading your textbook in depth Nervous System: Characteristics • The nervous system is a massive electrochemical
Premium Nervous system Brain Neuron
composed of dendrites‚ a cell body‚ axon with myelin sheath‚ and vesicles with neurotransmitters. The neuron receives information from sense receptors or from chemical messages from neighboring neurons via its dendrites‚ which pass the information to the cell body. The cell body fires an impulse‚ called the action potential‚ down the axon. The impulse is protected and sped along its way by the myelin sheath‚ which is a layer of fatty tissue that surrounds the axon. Each neuron receives signals from
Premium Neuron Nervous system Brain
Abstract This article is investing the effects of speed of the action potential across many neurons through investigating two diseases and performing related lab simulations. Multiple sclerosis and epilepsy are the two disease which are investigated and through the use of Neurons in Action lab simulations‚ we saw the effects that demyelination and channelopathy can have. As my hypothesis guessed‚ demyelination is the main cause of multiple sclerosis and channelopathy is the main cause of epilepsy
Premium Neuron Nervous system Parkinson's disease
The remaining 10% are on the soma‚ which have the highest priority. The unitary EPSP at a single synapse is about 0.2 mV in amplitude. Depending on the MN‚ sufficient of these must be activated to cause a depolarization of 5-10 mV at the axon hillock and thereby evoke an AP. b. Temporal summation results from activity arriving at different
Premium Muscle Nervous system Muscular system