other neurons using action potentials and neurotransmitters (Carlson‚ 2004). Neurotransmitters from the synaptic vesicle of the terminal button of a neuron can cause a graded potential. Unlike action potentials which are always depolarization‚ graded potentials may be either depolarization (excitatory) or hyperpolarization (inhibitory) (Kalat‚ 2007). Depending on whether the neurotransmitter hyperpolarizes or depolarizes the neuron‚ there are two basic postsynaptic potentials that take place in the
Premium Neurotransmitter Action potential
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
Neurophysiology Study Guide 1. Define "equilibrium potential". Why is the resting potential closer to the potassium equilibrium potential (EK+) than the sodium potential (ENa+)? The equilibrium potential is the point at which the force exerted on an ion by electrostatic and concentration gradient forces are balanced‚ and there is no net movement of that ion. The resting potential is closer to EK+ than ENa+ because the cell membrane is more permeable to
Premium Action potential
singal integration‚ it consists of the axon hillock. The signals transmitted from the first zone is integrated in this region. If the signal is strong enough‚ an action potential would be initiated. Third zone is specialized for signal conduction‚ it consists of the axon. The axon carries the information‚ usually from action potentials‚ from the cell body to the axon terminal. The fourth zone of a neuron is for signal transmission to target cells‚ it consists of the axon terminals. These axon terminals
Premium Neuron Action potential
telodendria. terminals. mitochondria. neurosomes. vesicles. vesicles Most CNS neurons lack centrioles. This observation explains the ability of neurons to produce a resting potential. the ability of neurons to communicate with each other. why CNS neurons grow such long axons. the ability of neurons to generate an action potential. why CNS neurons cannot divide to regenerate damaged tissue. why CNS neurons cannot divide to
Premium Action potential Neuron
Excitation Contraction Coupling Process The sequence of events that converts action potentials in a muscle fiber to a contraction is know as excitation contraction coupling. In order for a skeletal muscle fiber to contract‚ it has to get a signal from the nervous system. The part of the nervous system that it gets a signal from is called a motor neuron. An electoral signal‚ called an action potential travels down the axon and to the axon terminal. At the end of the motor neuron are structures
Premium Action potential Neuron Neurotransmitter
Which ion has the greatest electrochemical gradient? _sodium______ d. The net movement of these two ions would do what to the cell? _depolarize__ e. This would be called an ____excitatory________ postsynaptic potential‚ or __epsp__________________. 3. a. An inhibitory postsynaptic potential (IPSP) causes a neuron to __hyperpolarize_________________. b. An example of a neurotransmitter that causes an IPSP is ___gaba___________. c. What type of ions move into the cell in response to this
Premium Action potential Neurotransmitter Neuron
BIO 1012 Anatomy and Physiology Lab The Nervous System II: Anatomy Review 1. The somatic nervous system stimulates __Smooth__ muscle. The autonomic nervous system stimulates _Skeletal___ muscle‚ __Cardiac___ muscle‚ and _Glands___. 2. The autonomic nervous system (ANS) consists two divisions‚ each innervating the effector organs. The sympathetic nervous system (SNS) generally speeds up everything except digestion. The parasympathetic nervous system (PNS) generally slows down everything
Premium Action potential Neuron
The neurotransmitter‚ as a mediator‚ opens the channels of a number of ion species. This then leads to a resulting difference in the transmembrane potential. At this point‚ there exists two possible scenarios‚ one in which the membrane hyperpolarizes and one in which it depolarizes. This meaning that it is either an excitatory or an inhibitory postsynaptic
Premium Nervous system Neuron Brain
Unit 1 Financial Planning Profession 1. What are some of the most important reasons that lead to a demand for financial planning services? 2. How might the business cycle‚ media and behavioural biases impact on investor behaviour? How can a financial planner help? 3. Discuss the historical development of the financial planning industry in Australia 4. Explain the relationship between the financial planning profession and other key components of the wealth management industry in Australia.
Premium Investment