`ANP 1105 B – Human Anatomy and Physiology I Contents 1. Structural Organization of the Human Body (2 Lectures) 1.3.1 Tissues Tissue: groups of structurally similar cells that have perform common/related function Tissues cooperate within an organ for function of organ as a whole‚ different issues = division of labor 1.3.2 4 Types of Tissue: 1. Muscle Tissue: movement 2. Epithelial Tissue: covering 3. Nervous Tissue: control (regulation)
Premium Action potential Neuron
The Tired Swimmer Case Study Go to this Website: http://www.sciencecases.org/tired_swimmer/tired_swimmer.asp Answer the Following Questions for Parts IIV. Part I: 1. What vital signs or symptoms does Annie exhibit? Blurred vision and eye strain‚ hands ache and feel weak‚ gasping for air‚ weakness & Constant fatigue 2. Can you see any common features in Annie’s signs and symptoms? Blurred vision and eyestrain we must look at the optic nerve within the brain. Whenever you don’t see
Premium Action potential Muscle Neuromuscular junction
agents produce‚ called fasciculation‚ are forceful enough to be seen. During the second phase‚ muscles stop responding to acetylcholine‚ proving that neuromuscular blockade is in effect. When depolarizing agents are used‚ they still prompt the action potential to occur; this means that the neurons will still send information. (Source) However‚ even though the neurons are still working‚ the depolarizing agent causes the effector site to become desensitized‚ allowing the block to be successful. In comparison
Premium Nervous system Neuron Muscle
the central and peripheral nervous systems. 7. Classify neurons structurally and functionally. Membrane Potentials 8. Define resting membrane potential and describe its electrochemical basis. 9. Compare and contrast graded potentials and action potentials. 10. Explain how action potentials are generated and propagated along neurons. 11. Define absolute and relative refractory periods. 12
Premium Nervous system Neuron Brain
ii. Effects of Ach blocker- tubocurare- twitch tension declines. Blocks Ach and no muscle contraction. It is necessary for acetylcholine to bind to receptors in order for sodium ion channels to open and allow an action potential to occur in the muscle which is known as an end plate potential iii. Effects of direct muscle stimulation 2. Expected results a. Increasing amplitude- increase in twitch tension b. Increasing frequency- increase in twitch tension c. Tubocurare- decrease in twitch tension d
Premium Blood pressure Action potential Neuromuscular junction
stimulated nerve‚ 10 mV. The direct stimulation of the muscle required a higher voltage in order to get a contraction. This most likely occurs for two reasons. First is the fact that once a nerve reaches its threshold voltage‚ it perpetuates the action potential down the nerve to the muscle. This brings us to the second reason‚ the nerve branches out and reaches many thousand parts of the muscle‚ which all get depolarized. When stimulating directly‚ only the cells surrounding the electrode
Premium Muscle Acetylcholine Action potential
components of a reflex arc. Receptor‚ Sensory neuron‚ Integration‚ Motor neuron‚ and Effector. Somatic reflexes activate skeletal muscle and autonomic reflexes activate smooth or cardiac muscle 2. Describe the events of an action potential. During the action potential part of the neural membrane opens to let + charged ions in the cell and let – charged ions out. This causes a rapid increase in positive nerve fiber. 3. What is presbyopia? An age related disease that makes it hard to focus
Premium Negative feedback Action potential Feedback
Activity 1: The Resting Membrane Potential Pre-lab Quiz Results 1. What is the approximate concentration of K+ inside a typical cell (intracellular concentration)? a. 150 mM 2. What is the approximate concentration of K+ outside a cell (extracellular concentration)? b. 5 mM 3. What is the approximate concentration of Na+ inside a cell (intracellular concentration)? b. 5 mM 4. What is the approximate concentration of Na+ outside a cell (extracellular concentration)? a. 150 mM Experiment
Premium Action potential
Nerve Impulses ACTIVITY 1 The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. If the extracellular K+ increases then the concentration of intracellular K+ will decrease causing a decrease in the steepness of the concentration gradient and fewer K+ ions would be drawn out. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did
Premium Action potential
Neurons don’t travel‚ the impulses they transmit do. As a simple analogy‚ a neuron is like an electric cord: it stays still but an electric current flows through it. In the same way‚ a neuron stays still and electrical potentials (graded potentials and an action potential) move along its membrane fr... 4. What part of the neuron receives information? The function of the dendrites is to receive informat 5. How large are neurons? Neurons range from about
Premium Nervous system Brain Neuron