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kristen greer

kristen g.

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Heart conditions known as cardiomyopathies include two main subtypes. In hypertrophic cardiomyopathies, the heart muscle becomes stiff. Such disorders can be treated by drugs like verapamil, which block calcium channels. In a second class of cardiomyopathies, the heart muscle becomes dilated. These disorders are sometimes treated with the drug digoxin, which blocks Na$^+$ pumps and elevates intracellular Ca$^{2+}$ in cardiac muscle cells. Both types of disorder can be caused by mutations in the genes encoding troponin. Some of these mutations increase troponin's sensitivity to Ca$^{2+}$; other mutations reduce it. Based on the treatment protocols outlined, what type of mutation is responsible for hypertrophic cardiomyopathy? Choose one: A. mutations that either increase or decrease troponin's sensitivity to Ca$^{2+}$ B. mutations that decrease troponin's sensitivity to verapamil C. mutations that increase troponin's sensitivity to Ca$^{2+}$ D. mutations that decrease troponin's sensitivity to Ca$^{2+}$ E. mutations that decrease troponin's sensitivity to digoxin

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Question 3 Which of the following is most likely to be affected by a tumor on the hippocampus? A. creativity B. memory C. motor coordination D. basic biological urges 1 pts

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According to Maslow's theory on the Hierarchy of Needs, which of the following needs must be adequately satisfied before a person experiences a drive to pursue a safety need, such as security?

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Match the function with the correct hormone in the reproductive system. Group of answer choices Inhibits FSH release [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin stimulates testosterone production [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin Inhibits release of GnRH [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin produced by follicular cells and surge causes LH surge [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin Main hormone to maintain uterine lining [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin released by sertoli cells as sperm production increases [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin prevents uterine contractions during the luteal phase [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin stimulates release of FSH and LH [ Choose ] Estrogen, Progesterone relaxin Progesterone GnRH Testosterone, Estrogen, Progesterone Estrogen FSH LH Inhibin

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Convert the units of measure as indicated. 48 fl oz = ____ c

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Experience is important in motor development because it helps form neural connections Group of answer choices True False

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Using the graph below, find the amount after 30 years if $500 is invested at 13%, compounded over the following periods. P= 500 Annually 30000 r=13 % Monthly Quarterly Daily Continuously 20000 10000 P(t) = 500e^{0.13t} 0 (1, 569.41) t 5 10 15 20 25 30 Round answers to the nearest cent. a. Annually: Amount = $ b. Quarterly: Amount = $ c. Continuously: Amount = $

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Tutored Practice Problem 19.3.4 COUNTS TOWARDS GRADE Calculate the equilibrium constant from the standard free energy change. Close Problem Using standard thermodynamic data (linked), calculate the equilibrium constant at 298.15 K for the following reaction. HCl(g) + NH$_3$(g) \longrightarrow NH$_4$Cl(s) K =

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Q3) Complete the function regExpF to validate the information. Starts with an optional Mr. or Ms. and a space then a capital letter followed by 2 to 9 small case letters for the user name. Then one or more spaces followed by a 5-character password (digits, capitals or small letters), one or more spaces and the same password for confirmation. If the information is valid display an alert saying Thank you, otherwise The information entered is incorrect. 10 marks >>>>> Log-in to the System Please enter the following information: i) an optional access code digit (1-5) followed by a space, then ii) a username (between 3 and 5 small letters followed by between 3 and 5 digits) and finally iii) a 4 digit pin followed by one or more spaces and the same pin for confirmation Information: 3 james1237 4736 4736 Windows Internet Explorer X A Thank you X >>>> Roll Overs OK

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[Total: 30 pts] A simple pendulum consists of a point mass m fixed to the end of a massless rod (length l, whose other end is pivoted from the ceiling to let it swing freely in the vertical plane. The pendulum's position can be identified simply by its angle θ from the equilibrium position. a) [6 pts] Write the equation of motion for θ using Newton's second law. Assuming that the angle θ remains small throughout the motion, solve for θ and show that the motion is periodic. What is the period of oscillation? b) [6 pts] Show that the pendulum's potential energy (measured from the equilibrium level) is U = A(1 - cosθ). Find A in terms of mg and l. Then write down a formula for the mechanical energy as a function of θ and θ'. c) [6 pts] Show that by differentiating the energy with respect to t, you can recover the equation of motion you found in part a. What basic principle of physics are you using here? Discuss. Updated 03/02/22: Previous version had a typo. You need to differentiate the energy with respect to t (not with respect to θ). d) [6 pts] Picking simple values for parameters (e.g., m = l = 1, g = 10), use your favorite computational environment (e.g., NDSolve in Mathematica, for help see http://youtu.be/zKO6vOwOKaI) to solve for θ given a fairly small starting angle θ₀. Provide output that clearly shows that the period of oscillation is very close to the theoretical prediction from part a. Repeat with θ₀ = 2 rad (which is quite large) and show that the period now deviates from ideal. Does the period get larger or smaller as θ₀ increases? e) [6 pts] Using your numerical solution from part d and your formulas for energy from part b, generate a single plot which graphs T, U, and total E as a function of time, for one period, in the case where θ₀ = 2 rad is NOT small. Briefly comment: does the system still conserve energy when we cannot use the small angle approximation anymore?

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