1. Temporal summation
2. Spatial summation
3. Both
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Place each statement into its correct category: temporal summation, spatial summation, or both temporal and spatial...
Fifteen different presynaptic neurons synapse on a single postsynaptic neuron. The postsynaptic neuron has a RMP of -70 mV. At the trigger zone, 14 of the presynaptic neurons produce excitatory postsynaptic potentials of 2 mV each, and the other one produces an inhibitory postsynaptic potential of 9 mV. The threshold for the postsynaptic neuron is -50 mV. Will action potentials be produced in the postsynaptic neuron? Is this an example of temporal summation or spatial summation? Explain your answers.
1) The transfer of heat from arterial to venous blood is seen in dolphins. This type of thermoregulation is called A) thermogenesis. B) evaporation. C) vasoconstriction. D) vasodilation. E) countercurrent exchange. 2) Neural transmission across a mammalian synaptic gap is accomplished by A) the movement of sodium and potassium ions from the presynaptic neuron into the postsynaptic neuron. B) impulses travelling as electrical currents across the gap. C) impulses causing the release of a chemical signal and its diffusion across...
Complete the following sentences regarding impulse processing. nuclei presynaptic neuron divergence postsynaptic neurons action potential convergence neuronal pools facilitation 1. Neurons are organized into ____________ which can make multiple synaptic connections to receive and transmit information in the brain. 2. For example, any single neuron in the group may receive information from more than one ____________ . 3. This is called ____________ and makes it possible for impulses to have an additive effect or to collect a variety of sensory information. 4. An impulse from...
lys originating cieral cortex that may lead to the stimulation of motor in the rtex synapse with alpha motor neurons. Action potentials in the P' contract. ealpha motor neurons, which, in turn, stim primary motor cortex. Pyramidal cells in this region of the ulate skeletal muscles to contract. r several years, DP has controlled his seizures with a singl rbamazepine (Tegretol®). However, duri on rked e medication onths, he has increase in seizure activity. His neurologist has now prescribed a...
The right answer is (D) Please explain. I don't understand how K+ could be effluxing rather than influxing Passage IV (Questions 114-117) Electrical impubses are transferred from one neuron to another via a synapse. Synapses can be electrical or chemical. In response to an electrical stimalus such as an action potential the presynaptic neuron in a chemical synapse releases a neuro- transmitner across a small space between the two neurons known as a symaptic cief. Neurotransmitiers may have excita- ory...
INFORMATION ABOUT IMAGE G FOR QUESTIONS 12-15: GABAB receptors (GABABRs) are G-protein-coupled receptors that can be found on both pre- and postsynaptic neurons. When they are activated by GABA, they can have a range of effects. For the synapse you are studying in the following questions, the effects of GABABRs are indicated in IMAGE G. You are doing a series of experiments in which you are recording from the pre- and postsynaptic cell at a synapse. The experiments described below...
change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...
For each multiple choice, what is the answer and why? 5. Myelin A) is only found in the peripheral nervous system B) is secreted from the axon terminals of autonomic neurons. C) is a carbohydrate within the membranes of some neuroglia. D) is a chemical present in the plasma membrane of neurons. E) influences the rate of conduction of an electrical signal down an axon. 6. Which of the following organs/structures is (are) innervated by somatic motor nerves? (only ONE...
please answer - What is the purpose of an EEG? What sends the signal! Wildt Which parts of the brain are involved in movement? Practice Questions uestions. These questions are for practice. All possible content may not be represented in this subset of question Dita 1. Jn which area of the cerebrum is the visual cortex located? 2. The is thought to be the involved in learning and memory. 3. The specialization of each cerebral hemisphere for certain functions is...
Building a Medical Vocabulary HCP 224 Complete each statement: 4. Inflammation of the uterine lining is called ____________________. 9. Woman designated as para 2 is a(n)____________________. 12. Outside the uterus is termed ____________________. 15. Situated on or outside is termed ____________________. 26. Beneath the kneecap refers to ____________________. 27. Direct visualization of a joint is ____________________. 29. Fusion of a joint is known as ____________________. 30. Incision of the breastbone is a(n) ____________________. 31. Inflammation of the joints is called...