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In answering the following questions, pretendu don't know anything about what is happening before the break...
he figure below shows the results from an experiment by Llinas and Heuser, 1977 using the...
he figure below shows the results from an experiment by Llinas
and Heuser, 1977 using the squid giant synapse. The voltage-gated
sodium and potassium channels were blocked with TTX and TEA,
respectively. The presynaptic terminal was clamped at different
voltage steps (bottom traces) and presynaptic calcium current
(middle) and postsynaptic voltage (top) were measured. Explain what
this experiment demonstrated about the mechanism of
neurotransmitter release. Does this particular
experiment address necessity or sufficiency, or both?
Postsynaptic potential 2 mV Presynaptic...
Use what you know about the physiology of neurons to answer the following questions. Treat each of these questions as u...
Use what you know about the physiology of neurons to answer the following questions. Treat each of these questions as unrelated to each other. a. Imagine that a mutation makes Na* leak channels just as common as K' leak channels. Explain the effect of this mutation on the resting potential of this neuron. 3. b. The intracellular:extracellular ratio of K' ions is normally 150:4mM. Imagine that you decrease that ratio to 150: 20mM. Describe the subsequent effect on the resting...
Help with all questions 1. Patch clamp recording of a single ion channel yields the following...
Help with all questions
1. Patch clamp recording of a single ion channel yields the following results Holding Potential Measured Current (mV)(pA) 0.0 -100 -50 +2.0 +3.0 ta +50 +100 A) Draw a graph of the current (on the vertical axis)-voltage relation for this channel. B) What isthe electrical resistance ohms of this channel? keep in mind mv= 103 volts, pA 1012 amperes, and an ohm is a derived unit that is equivalent to a volt/ampere, i.e. a VIA) C)...
please write thorough answers thanks PART 1 Answer ONLY ONE of the following TWO questions of...
please write thorough answers thanks
PART 1 Answer ONLY ONE of the following TWO questions of Part 1 ie a) OR b) a) A typical, healthy nerve cell in the body has intracellular and extracellular Na, K and Cl' concentrations as shown below. Na concentration: Extracellular: = 150 mm K concentration: Extracellular: = 4 mm Ci concentration: Extracellular: = 100 mm Temperature = 37°C (303.3K) R (the Universal Gas constant) = 8.315 VCmol'k F (Faraday's constant) = 96,485 Cmol Intracellular:...
4. Inspired by the natural design of cell membranes, you have invented a strange new semi-permeable...
4. Inspired by the natural design of cell membranes, you have invented a strange new semi-permeable membrane consisting of a water-impemeable base layer interspersed with hydrophilic transmembrane glycoproteins which form three types of channels. Channel type 'A' is approx imately 3 angstroms in diameter and lined with negative charges Channel type 'B' is approximately 3 angstroms in diameter also but lined with positive charges Channel type C is approximately 4 angstroms in diameter and electrically neutral This membrane separates two...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in ...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
change pas channels in the volta t ive protein to change shape. This A of the...
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...
Chose the correct answer(s) from the multiple choice lists below 1. Exergy of a system is a) b) always increasing e) guided by the first and second laws of thermodynamics for reversible proce...
Chose the correct answer(s) from the multiple choice lists below 1. Exergy of a system is a) b) always increasing e) guided by the first and second laws of thermodynamics for reversible processes only Un d) limited by the second law of thermodynamics for all processes. processes, it is destroyed partly or completely). e) equal to the Gibs free energy of the system. 211two electrodes, one made of u (E.-3.06 V) and another made of Cu ΟΕ.+034V placed in an...
Note: This test contains ten questions from chapter 19 to chapter 27. For full credit, you...
Note: This test contains ten questions from chapter 19 to chapter 27. For full credit, you should show all the steps of your numerical answers. No credit would be earned for just circling the right answers. Chapter 19 - Electric Potential and Electric Potential Energy 1. Two point charges are of + 7 uC and - 4 C are held at the corners of a rectangle as shown. The lengths of the sides of rectangle are 0.15 m, and 0.05...
i'm workimg on a careplan and i need help. i don't know what this Roy adaption...
i'm
workimg on a careplan and i need help. i don't know what this Roy
adaption model is. can someone please help me?
HELENE FULD COLLEGE OF NURSING CRITERIA FOR EVALUATION OF NURSING CARE PLAN NUR 221 ASSESSMENT Pole poids Actual points d at of 1. Cabe 2. Uspor include e pay and environmental tervisection, auto plation, and person D hes 3. a t in prima including wojective and objective data history, cum DIAGNOSIS Posle points Actual points Criteria Incorporate...
he figure below shows the results from an experiment by Llinas
and Heuser, 1977 using the squid giant synapse. The voltage-gated
sodium and potassium channels were blocked with TTX and TEA,
respectively. The presynaptic terminal was clamped at different
voltage steps (bottom traces) and presynaptic calcium current
(middle) and postsynaptic voltage (top) were measured. Explain what
this experiment demonstrated about the mechanism of
neurotransmitter release. Does this particular
experiment address necessity or sufficiency, or both?
Postsynaptic potential 2 mV Presynaptic...
Use what you know about the physiology of neurons to answer the following questions. Treat each of these questions as unrelated to each other. a. Imagine that a mutation makes Na* leak channels just as common as K' leak channels. Explain the effect of this mutation on the resting potential of this neuron. 3. b. The intracellular:extracellular ratio of K' ions is normally 150:4mM. Imagine that you decrease that ratio to 150: 20mM. Describe the subsequent effect on the resting...
Help with all questions
1. Patch clamp recording of a single ion channel yields the following results Holding Potential Measured Current (mV)(pA) 0.0 -100 -50 +2.0 +3.0 ta +50 +100 A) Draw a graph of the current (on the vertical axis)-voltage relation for this channel. B) What isthe electrical resistance ohms of this channel? keep in mind mv= 103 volts, pA 1012 amperes, and an ohm is a derived unit that is equivalent to a volt/ampere, i.e. a VIA) C)...
please write thorough answers thanks
PART 1 Answer ONLY ONE of the following TWO questions of Part 1 ie a) OR b) a) A typical, healthy nerve cell in the body has intracellular and extracellular Na, K and Cl' concentrations as shown below. Na concentration: Extracellular: = 150 mm K concentration: Extracellular: = 4 mm Ci concentration: Extracellular: = 100 mm Temperature = 37°C (303.3K) R (the Universal Gas constant) = 8.315 VCmol'k F (Faraday's constant) = 96,485 Cmol Intracellular:...
4. Inspired by the natural design of cell membranes, you have invented a strange new semi-permeable membrane consisting of a water-impemeable base layer interspersed with hydrophilic transmembrane glycoproteins which form three types of channels. Channel type 'A' is approx imately 3 angstroms in diameter and lined with negative charges Channel type 'B' is approximately 3 angstroms in diameter also but lined with positive charges Channel type C is approximately 4 angstroms in diameter and electrically neutral This membrane separates two...
1. Why can the DSO only measure node voltages when the Function Generator is the power supply in a circuit (unless it is using a current probe)? 2. Consider Figure 1. According to the calculations in the lab handout, if Z-1kΩ +/6914, then the phase difference (фи-фі) between u(t) and i (t) is 34.6". a. If this v(t) and i(t) were displayed on a DSO (v(t) being a node voltage and using a current probe for i(t) as shown in...
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...
Chose the correct answer(s) from the multiple choice lists below 1. Exergy of a system is a) b) always increasing e) guided by the first and second laws of thermodynamics for reversible processes only Un d) limited by the second law of thermodynamics for all processes. processes, it is destroyed partly or completely). e) equal to the Gibs free energy of the system. 211two electrodes, one made of u (E.-3.06 V) and another made of Cu ΟΕ.+034V placed in an...
Note: This test contains ten questions from chapter 19 to chapter 27. For full credit, you should show all the steps of your numerical answers. No credit would be earned for just circling the right answers. Chapter 19 - Electric Potential and Electric Potential Energy 1. Two point charges are of + 7 uC and - 4 C are held at the corners of a rectangle as shown. The lengths of the sides of rectangle are 0.15 m, and 0.05...
i'm
workimg on a careplan and i need help. i don't know what this Roy
adaption model is. can someone please help me?
HELENE FULD COLLEGE OF NURSING CRITERIA FOR EVALUATION OF NURSING CARE PLAN NUR 221 ASSESSMENT Pole poids Actual points d at of 1. Cabe 2. Uspor include e pay and environmental tervisection, auto plation, and person D hes 3. a t in prima including wojective and objective data history, cum DIAGNOSIS Posle points Actual points Criteria Incorporate...
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