Given: Mice have a paw withdrawal reflex to high heat but not to cool temperatures. Agree or disagree: If you replace the TRPM8 channel in cool-sensitive neurons with VR1 (TRPV1) from high heat-sensitive neurons, the mice will now withdraw their paw in response to cool temperature.
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- List four factors that might influence the reaction time to a stimulus .Consider the ruler drop response time test you performed; do you believe it was valid and reliable? Why or why not ? Provide justifications for your answer. [Hints: Here are a few ideas. Will you conduct many tests on the same subjects (that means the people you are testing))? Is it necessary to use averages? Are there any precautions to take? [Are there any variables that must remain constant?]Identify the ways that increased IP3 can cause contraction. Identify the ways that increased cAMP production can cause relaxation.Muscle Contraction In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle fibre is observed in this experiment. One end of the muscle fibre is attached to a mass. The following data were obtained from the experiment. Number of Trials Strength of Stimulus (mV) Mass Lifted by Muscle Contraction (g) 1 20 0 2 40 0 3 60 50 4 80 50 5 100 Not Tested 6 120 50 *note that the voltage applied is positive in order to raise potential from resting to threshold Identify the manipulated, responding and controlled variables in the experiment described above. Strength of Stimulus Number of Muscle Fibre Stimulated Mass Lifted by Muscle Contraction
- "Motor neurons trigger action potentials in muscle cell membranes that open voltage-sensitive Ca2+ channels in T tubules, allowing extracellular Ca2+ to enter the cytosol, bind to troponin C, and initiate rapid muscle contraction", is true or false.In the knee jerk, contraction of quadriceps is accompanied by relaxation of the opposing flexor muscles. The contraction of quadriceps is mediated by a monosynaptic reflex (as stated above), and the relaxation of the antagonists is due to a dual connection reflex. The relaxation of antagonists is mediated by an inhibitory transmitter released by interneurones - these are called the la inhibitory interneurones, How do we name a dual connection reflex? monosynaptic disynaptic tricynaptic polysaccharideCompare and contrast neural and endocrine control systems on the basis of speed, duration of action and coding for stimulus intensity.
- Cold receptors respond to a temperature range of. 10-40°C. 40-60°C 32-48°C 5-25°C.Briefly describe why there could be a possible link between TAS2R38 sensitivity and obesity. In your own words, formulate a summary (background, aim, method, results, conclusion) of a published study on obesity and taste receptors in your answer.Please help Why does TTX reduce the response caused by nerve stimulation and also the response to direct muscle stimulation?
- In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle fibre is observed in this experiment. One end of the muscle fibre is attached to a mass. The following data were obtained from the experiment. Number of Trials Strength of Stimulus (mV) Mass Lifted by Muscle Contraction (g) 1 20 0 2 40 0 3 60 50 4 80 50 5 100 Not Tested 6 120 50 Is the threshold potential for this muscle fibre exactly 50 mV. Do you agree or disagree? Explain.The overall word limit for this task is 500 words (+/-10%). You must cite the sources that you use in-text and provide a reference list. Question 1 (AC 2.1) Examine the diagram which illustrates how the body controls homeostasis. Input: Information sent along afferent pathway to Receptor (sensor) 2 Change detected by receptor 1 Stimulus: Produces change in variable Imbalance Control center Variable (in homeostasis) positivenegative-feedback-mechanisms/(accessed 06/01/20). Imbalance 4 Output: Information sent along efferent pathway to Effector 5 Response of effector feeds back to influence magnitude of stimulus and returns variable to homeostasis Image source: https://anatomyandphysiologyi.com/homeostasis- a) Receptors (sensors) form the first part of the control mechanism. What is a receptor? Provide an explanation then give one example of where a receptor is found, explaining its role is in monitoring homeostasis. b) Draw a simple summary diagram displaying the different levels of…Muscle Contraction In an experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with one muscle fibre is observed in this experiment. One end of the muscle fibre is attached to a mass. The following data were obtained from the experiment. Analyze the data and answer the following questions. Number of Trials Strength of Stimulus (mV) Mass Lifted by Muscle Contraction (g) 1 20 2 40 3 60 50 4 80 50 100 Not Tested 120 50 *note that the voltage applied is positive in order to raise potential from resting to threshold Identify the manipulated, responding and controlled variables in the experiment described above. Strength of Stimulus Number of Muscle Fibre Stimulated Mass Lifted by Muscle Contraction