Question 8 A company estimates that 30\% of its customers make repeat purchases. The marketing team surveys N = 160 customers. What is the probability that 35\% or more of the surveyed customers make repeat purchases?

Question 10 A restaurant tracks the proportion of customers who order dessert after their meal. Out of the last 1,200 customers, 360 ordered dessert. Which of the following values of p, the long-run proportion of customers ordering dessert, are included in a 95% confidence interval? I. p = 0.28 II. p = 0.3 III. p = 0.34

Select from the drop down box, the correct type of muscle for each of the examples: The wall of the urinary bladder that pushes urine into the urethra. [A] The respiratory diaphragm at the base of the lungs for breathing. [B] The wall of small arteries called arterioles that help regulate blood flow. [C]  

Describe the specific mechanism that links depolarization of the T-tubules and the SR release of calcium:

Scientists have identified at least 10 different myosin heavy chain (MYH) gene versions (or isoforms) in mammals from striated, smooth, and non-muscle cells. Match the fiber type with the primary myosin heavy chain gene/protein version: Type I Fiber [A] Type IIa Fiber [B] Type IIx Fiber [C]

Every spring the NFL evaluates top college athletes for their performance in various football activities. One event is the 40 yard (~40 meters) dash or running sprint. One year the fastest was 4.22 seconds to sprint the 40 yards. Which energy pathway will supply most of the newly required ATP in muscles during the first 1 to 5 seconds of a running sprint?

Assuming you are a teaching assistant in BIOL 430 in the near future. Help a student in your “office hours” by describing the role of each of the following in muscle function – actin, myosin, troponin, and tropomyosin:

When you lift a barbell and generate enough force to shorten the biceps and lift the barbell then this is which type of contraction? [A] When you generate enough force to keep the barbell in a static position and not moving at all then this is which type of contraction? [C] When you generate enough force in the biceps to slowly lower the barbell so that the muscle is actually lengthening then this is which type of contraction? [B]

Describe (if you only list then no credit) the three mechanisms of ATP production in a skeletal myocyte that needs more ATP for muscle contraction:

BOTOX® is the commercially available form of a naturally occurring bacterial toxin. Doctors inject this toxin to paralyze specific muscles of facial expression thus reducing the appearance of lines and wrinkles. What specific mechanism allows BOTOX to stop muscle contraction?