Cocaine and amphetamine blocks the reuptake of dopamine from the synapse. This would result in A....
The dopamine transporter gene encodes a protein required to re-uptake dopamine into the pre-synaptic neuron from the synapse. How might a variant allele of the dopamine transporter gene, which results in a transporter protein with increased function , be involved in predisposing an individual to addictive behavior? A) The dopamine transporter variant allele would produce more dopamine in response to addictive behavior B) The dopamine transporter variant allele would produce less dopamine in response to addictive behavior C) The dopamine...
2. Curare blocks acetylcholine receptors at the motor end plate. This would result in: (1) Inability of the muscle fiber to respond to nervous stimulation (2) Increased muscle stimulation (3) Increased actylcholinesterase production (4) Lack of calcium uptake by the muscle fiber 3. The structure that is analogous to the Zline of skeletal muscle is the __ of smooth muscle. The structure that is analogous to troponin of skeletal muscle is _ muscle is ___ of smooth muscle. 4. Draw...
2. Long-term Potentiation is a process that strengthens the transmission of a single synapse in a circuit. This is achieved when pre-synaptic cells and post-synaptic cells fire action potentials at the same time. Usually multiple pre-synaptic cells synapse onto one post-synaptic cell, increasing the probability of inducing an action potential in the post- synaptic cell. You may need to refer to your textbooks or online resources for this question, as we do not cover this in explicit detail in class....
What is typically the role of an inhibitory synapse? to open Na+ channels in the post-synaptic membrane to depolarize the post-synaptic membrane to generate an EPSP to hyperpolarize the post-synaptic membrane If a post-synaptic nerve cell receives a large number of EPSPs from synapses on different dendrites, what is the most likely result? A hyperpolarization Mechanical summation Spatial summation An IPSP Why might natural selection have favored cephalization? It allows animals to better detect stimuli behind them, if they are...
Answer Thi Q. thank You The Nervous System edit) 1. The junction between one neuron and the next, or between a neuron and an effector is called: A) A synapse 8) A dendrite C) A neuotransmiter D ) A ventricle E) None of the above 2. A fast excitatory synapses follows this order A) (1) neurotransmiter released (2) diftused across the synaptic cleft to a receptor protein (3) binding of the transmitter opens pores in the ion channels and positive...
The Brain on Mind Altering Drugs Psychoactive drugs alter brain function by acting at synapses in the brain, where they may mimic, enhance, or block the effects of natural signaling molecules (neurotransmitters). The neurotransmitter dopamine plays a particularly important role in creating the dependency aspect of both drug and behavioral addictions. Natural behaviors which enhance survival and/or reproduction, such as eating or engaging in sex, result in a surge of dopamine. Normally, this response helps individuals learn to repeat beneficial...
14) Postnatal bone growth that increase the length of bones a. Occurs by endochondral ossification b. Occurs by appositional growth c. End when the epiphysis and diaphysis fuses d. A&B ab. B &C ac. A&C 15) Glial cells of the neural tissue: a. are more abundant than neurons b. respond to infection c. help myelinate CNS axons d. help regulate the neuronal environment e. all of the above 16) Neurotransmitters are removed from the synaptic cleft by: a. reuptake into...
17) An IPSP (Inhibitory Postsynaptic Potential) can result from the opening of potassium ion channels can result from the opening of chloride ion channels increases the membrane potential towards threshold A & B A & C B & C 18) Saltatory Conduction Occurs only in myelinated axons Occurs in all axons Allows action potentials to travel more quickly down an axon A & B A & C B & C 19) A diarthrosis is: A freely moveable joint A slightly...
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...
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...