Communication‚ Homeostasis & Energy Communication & Homeostasis Outline the need for communication systems within multicellular organisms‚ with reference to the need to respond to changes in the internal and external environment and to co-ordinate the activities of different organs. Organisms need to respond to external stimuli‚ e.g. temperature‚ oxygen concentration and levels of sunlight. These may be over time‚ e.g. winter fur to summer fur‚ or quickly‚ e.g. changing size of pupils. Internal
Free Cellular respiration Adenosine triphosphate Action potential
that has as its primary function the job of connecting other neurons is called a(n) ________. A) association neuron B) afferent neuron C) efferent neuron D) glial cell 7) 8) Which ion channel opens in response to a change in membrane potential and participates in the generation and conduction of
Premium Action potential Neuron Nervous system
The Tired Swimmer Case Two BIO: 201-104 November 11‚ 2010 Part I: Meet Annie 1. What vital signs or symptoms does Annie exhibit? a. Blurred vision and eye strain b. Hands ache and feel weak c. Gasping for air d. Weakness & Constant fatigue 2. Can you see any common features in Annie’s signs and symptoms? With blurred vision and eyestrain we must look at the optic nerve within the brain. From there‚ what could be causing the difficulty breathing and weakness
Premium Action potential Neuron Neuromuscular junction
CHAPTER 2: THE BIOLOGY OF MIND CHAPTER OBJECTIVES 1. Explain why psychologists are concerned with human biology. 2. Describe the structure of a neuron‚ and explain how neural impulses are generated. 3. Describe how nerve cells communicate‚ and discuss the impact of neurotransmitters and drugs on human behavior. 4. Identify the major divisions of the nervous system and describe their functions‚ noting the three types of neurons that transmit information through the system
Premium Neuron Nervous system Action potential
Unit 5 Biology notes Contents Section 9.1 – Sensory Reception 3 Section 9.2 – Nervous Control 4 Section 9.3 – Control of heart rate 5 Section 9.4 – Role of receptors 6 Section 10.1 – Coordination 8 Section 10.2 – Neurons 10 Section 10.3 – The nerve impulse 11 Section 10.5 – The speed of a nerve impulse 12 Section 10.6/10.7 – Structure and function of the synapse / Transmission across
Premium Action potential Neuron
Drugs & Behavior EXAM I Study Guide Every correct answer is on the test…MC & Matching terms with definitions. No short answers… Terms: Psychopharmacology study of the action of drugs on living organisms Specific Drug Effects: result from physical and biochemical interactions of a drug with its target tissue Therapeutic effects- desirable effects of drug-receptor binding Side effects- undesirable effects of drug-receptor binding Non-specific Drug Effects: effects of a drug not based on
Premium Action potential Neuron Dopamine
SBI4U - Practice Exam Part A: Multiple Choice 1. When organic molecules are joined together and a water molecule is removed‚ the reaction is called which of the following? A. Dehydration synthesis. B. Hydrogenation. C. Hydrolysis. D. Oxidation. What is a nucleotide composed of? A. Nitrogenous base‚ 6 carbon sugar and a phosphate group. B. Nitrogenous base‚ 5 carbon sugar and a phosphorus group. C. Nitrogenous base‚ 5 carbon sugar and a phosphate group. D. None of the above. Enzymes work as catalysts
Premium DNA DNA replication Adenosine triphosphate
drifts across the cleft and into ACh receptors in the sarcolemma of the muscle fiber. After the sarcolemma receives the ACh‚ ion channels in the ACh receptors are opened and Sodium and Potassium both pass through them. Sodium then triggers action potential that travels across the sarcolemma and into the T Tubules. Once the AP is in the T tubules it is sensed by receptors and causes the sarcoplasmic reticulum to release Calcium into the muscle fibers cytosol. (Marieb and Hoehn‚ 2007) This Calcium
Premium Myosin Action potential Muscle
This allows the nerve impulse to travel much faster. If the myelin sheath were missing‚ the nerve impulse would travel at a much slower speed. d) What is d? Explain what happens when an action potential reaches d. The structures labeled d are synaptic knobs. When an action potential reaches the knobs‚ they release neurotransmitters that carry the signal across the synapse. These neurotransmitters usually work by binding to receptor proteins in the membrane of the receiving neuron
Premium Neuron Action potential Nervous system
contract___ d. AV Bundle (Bundle of His) _link between atria and ventricles__ e. Bundle Branches __convey impulses down the interventricular septum___ f. Purkinje Fibers ___convey the depolarization throughout the ventricular walls_____ 4. The action potentials spread from the autorhythmic cells of the intrinsic conduction system (electrical event) to the _contractile__ cells. The resulting mechanical events cause a heartbeat. 5. A tracing of the electrical activity of the heart is called a/an __electrocardiogram__
Premium Heart Cardiac electrophysiology Action potential