Please asap with explanation How does the relationship between INa and IK change as the stimulus currentincreases? What happens with these currents at the threshold current?Voltage (mV)150-15-30INA (NA)Inj (nA)-45-60-750IK (NA)282420161222118406284000.8 F0-0.8-1.6-2.4-3.2-4odo011Burgundy=24.7Red=24.71220.50.40.30.20.10-0.102Blue initial current at 24.5 nAPurple= 24.623355557

The relationship between the sodium current (INa), the potassium current (IK), and the stimulus…

Answered: INA (NA) Inj (NA) 0.8 -0.8 -1.6 -2.4 0…

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter44: Internal Transport

Section: Chapter Questions

Problem 6TYU

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علمنا 30 -55 -70 1 2 3 Threshold Which statement does not accurately describes the figure above? the curves depict depolarizing currents curve 3 shows an action potential that has evolved from graded potentials curves 1 and 2 show hyperpolarizing currents that prevent the onset of an action potential curve 4 depicts a repeated supra-threshold activation
Which of the following would result in higher force production at lower action potential frequencies W. increase SERCA activity X. increase DHPR sensitivity Y. increase acetylcholineesterase activity Z. increase Ca2+ release
Cheetahs and human sprinters tend to have a high proportion of ________fibers in their leg muscles. a. white b. fast red c. slow red
A _______________ is a drug that causes temporary paralysis by blocking the transmis- sion of nerve stimuli to the muscles. neuromuscular blocker skeletal muscle relaxant
PGC1alpha O is regulated by PPAR-delta O affects many tissues relevant to endurance training O is directly stimulated by AMP binding O specifically affects muscle tissue in its role as ediator of endurance training
The traces below show the action potential waveforms in an external meidum of different concentrations of * 40 100% 50% 33% 40 1 2 time (msec) calcium chloride potassium O sodium
In UMN lesions the response of the paralyzed muscles to electrical stimulation is :-a- exaggeratedb- inhibitedc- not changedd- is absent
+30 0 -55-B -70- -80- 0 1 H E 2 F 3 Time (ms) G 4 6. What happens when the threshold potential is reached? 2. A. What type of summation is shown for the graded potentials in the above graph? 5 C. At approximately +30 mV on the graph, what happens in between the depolarization and repolarization phases? D. What mechanism is responsible for the occurrence of the hyperpolarization phase? E. How is the resting membrane potential of the neuron restored? F. Is it possible to generate a second action potential during either refractory period? If so, which one and how?
Put the steps for running an EMG to study fatigue in the correct order. At regular intervals, measure the applied force by looking at the blue signal. ts Increase the clench force to maximum eBook eferences Start recording the EMG signal. 3 At every interval, count the number of active motor units, repeat until the applied force drops to 50% of its initial value Mc Graw Hill ype here to search
tab LL What is the relationship between action potential conduction velocity and axonal diameter? O a. Action potential conduction velocity decreases with increasing axonal diameter O b. Action potential conduction velocity increases with decreasing axonal diameter Oc. Action potential conduction velocity increases with increasing axonal diameter O d. There is no relationship between the action potential conduction velocity and the axonal diameter esc QUESTION 9 It QUESTION 10 The movement of what ion occurs in the rising phase of the action potential? O a. Inward Na+ O b. Outward K OC. Outward Nat Od. Inward K QUESTION 11 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Type here to search ! 1 ? Q @ 2 W # * 3 E f4 $ IOI 4 H fs % R LO 5 16 10 T (O 6 4- & 7 Y 18 U
ants/911902/take/6/ Match each substance with its role in muscle contraction. enters muscle cell to cre- ate action potential leaves muscle cell to cre- ate action potential signals neuron to release acetylcholine opens ion channels in the sarcolemma 500000 Questions Answered a. Ca²+ b. ACh K+ d. Na+ All Changes Saved < 12 ✰ ✰ 4) ( Continu 9 2
+20 +10 t Pk; IPca", L Self-induced 을 아 action potential - 10 -20 -3아 1Pca, L; Threshold potential -40- LPe,T -5아 Ca in Pca, T; iPNa', 4 Na* in -60 Slow depolarization (pacemaker potential) Time (msec) The action potential shown here could appear in of he heart. O a cell of the left AV valve a conducting cell of the right atrium a contractile cell of the ventricles O a contractile cell of the right atrium Membrane potential (mV)

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