In this discussion, give examine aspects of the human nervous system, how they function, and how disorders affect them.

There are many disorders associated with the nervous system. Identify two disorders, compare each one's effects on the nervous system, and describe their progression. What are their signs and symptoms? Which disorder seems more severe? Why?

Use textbook or Internet search to find possible treatments for each disorder that you identified. Which disorder seems more treatable?

Which of the following statements would be true of a human trait that has high heritability in a population of one country? why?

a. The phenotypic difference within monozygotic twin pairs would be about the same as the phenotypic differences among members of dizygotic twin pairs. why?

b. There is very little phenotypic variation between monozygotic twins but high variability between dizygotic twins. why?

c. The trait would have the same heritability in a population of another country. why?

Use the following information for all remaining questions on this worksheet.

The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days.


1.a) If one pregnant woman is randomly selected, find the probability that her pregnancy lasts less than 260 days. Round your result to 4 decimal places.

a. 0.2969

b. 0.7031

c. 0.5000

d. 0.2742


1.b) Is it unusual for one woman to have a pregnancy that lasts less than 260 days?

a. No, the probability is greater than 0.05.

b. Yes, the probability is greater than 0.05.

c. Yes, the probability is less than 0.05.

d. No, the probability is less than 0.05.


1.c) Complete the following sentence: If we looked at a random sample of 100 pregnant women would expect ____  to have pregnancies lasting less than 100 days.

a. 29 or 30

b. 27 or 28

c. about 50

d. 71 or 72


1. d) A researcher chooses a sample of 25 pregnant women and wants to look at the mean length of the pregnancies for the sample. Does the Central Limit Theorem Apply? Briefly explain why or why not.


1.e) What is the probability that a randomly selected sample of 25 pregnant women have a mean length of pregnancy less than 260 days? Round your response to 4 decimal places.


1.f) Based on your response to the previous question, is it unusual for a random sample of 25 women to have a mean length of pregnancy of less than 260 days? Explain your response in a full sentence.


1.g) If a random sample of 25 pregnant women had a mean length of pregnancy of less than 260 days, does that mean that all 25 women had a pregnancy that lasted less than 260 days? Explain your response in a full sentence.

Use the following information for all remaining questions on this worksheet.

The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days.


1.a) If one pregnant woman is randomly selected, find the probability that her pregnancy lasts less than 260 days. Round your result to 4 decimal places.

a. 0.2969

b. 0.7031

c. 0.5000

d. 0.2742


1.b) Is it unusual for one woman to have a pregnancy that lasts less than 260 days?

a. No, the probability is greater than 0.05.

b. Yes, the probability is greater than 0.05.

c. Yes, the probability is less than 0.05.

d. No, the probability is less than 0.05.


1.c) Complete the following sentence: If we looked at a random sample of 100 pregnant women would expect ____  to have pregnancies lasting less than 100 days.

a. 29 or 30

b. 27 or 28

c. about 50

d. 71 or 72


1. d) A researcher chooses a sample of 25 pregnant women and wants to look at the mean length of the pregnancies for the sample. Does the Central Limit Theorem Apply? Briefly explain why or why not.


1.e) What is the probability that a randomly selected sample of 25 pregnant women have a mean length of pregnancy less than 260 days? Round your response to 4 decimal places.


1.f) Based on your response to the previous question, is it unusual for a random sample of 25 women to have a mean length of pregnancy of less than 260 days? Explain your response in a full sentence.


1.g) If a random sample of 25 pregnant women had a mean length of pregnancy of less than 260 days, does that mean that all 25 women had a pregnancy that lasted less than 260 days? Explain your response in a full sentence.

Q1. The hormone norepinephrine is released in the human body during stress and increases the body’s metabolic rate. Like many biochemical compounds, norepinephrine is composed of carbon, hydrogen, oxygen, and nitrogen. The percent composition of this hormone is 56.8% C, 6.56% H, 28.4% O, and 8.28% N. What is the empirical formula of norepinephrine?  

Q2. Elemental magnesium consists of three isotopes: ²⁴Mg with an accurate mass of 23.99 amu, ²⁵Mg with an accurate mass of 24.99 amu, and ²⁶Mg with an accurate mass of 25.99 amu. If ²⁴Mg is 79% of naturally occurring magnesium, what is the percent abundance of ²⁶Mg?   

A) 10%

B) 11%

C) 15%

D) 19%

E) 21%

Q3. A compound containing xenon and fluorine was prepared by shining sunlight on a mixture of Xe (0.526 g) and excess F₂ gas. If you isolate 0.678 g of the new compound, what is its empirical formula?  

Red blood cells have an average lifespan of 120 days in the human body. If a given individual produces 200 billion red blood cells per day, what is the average number of red bloods cells in his/her body? (Note: 1 trillion = 1000 billion) SHOW WORK

a) 1.6 trillion cells b) 8 trillion cells c) 16 trillion cells d) 24 trillion cells e) 30 trillion cells f) 600 trillion cells g) We do not have enough information to answer this question.

According to a Human Resources report, a worker in the industrial countries spends on average 419 minutes a day on the job. Suppose the standard deviation of time spent on the job is 28 minutes. a. If the distribution of time spent on the job is approximately bell shaped, between what two times would 68% of the figures be? enter the lower limit for the interval where 68% of the values would fall 391 to enter the upper limit for the interval where 68% of the values would fall 447 b. If the distribution of time spent on the job is approximately bell shaped, between what two times would 95% of the figures be? enter the lower limit for the interval where 95% of the values would fall 363 to enter the upper limit for the interval where 95% of the values would fall 475 c. If the distribution of time spent on the job is approximately bell shaped, between what two times would 99.7% of the figures be? enter the lower limit for the interval where 99.7% of the values would fall 335 to enter the upper limit for the interval where 99.7% of the values would fall 503 d. If the shape of the distribution of times is unknown, approximately what percentage of the times would be between 360 and 478 minutes? enter percentages rounded to 1 decimal place 76.7 % (Round the intermediate values to 3 decimal places. Round your answer to 1 decimal place.) e. Suppose a worker spent 400 minutes on the job. What would that worker’s z score be, and what would it tell the researcher? z score = enter the z score rounded to 3 decimal places -0.679 (Round your answer to 3 decimal places.) This worker is in the lower half of workers but within select the distance from the mean standard deviation of the mean.

Which of the following is TRUE of intercellular communication within a human body? (select ALL that apply)

[12] In an experiment on human behavior, a psychologist asks four men and four women to enter a room and sit at a rectangular table. This table has three seats on each of the longer sides of the table, and one seat at each end of the table. The seats at the end of the table are considered to be the dominant seats. (A diagram may help you to visualize this).

a. If the people choose their seats randomly, determine the probability distribution for the random variable X, where X represents the number of women occupying the end seats. [4]

b. Determine E(X) and Var(X). [5]

c. In 15 independent repetitions of the experiment involving different people each time, calculate the probability that women occupy both end seats 2 or more times. [3]

According to Wikipedia the oldest human was Jeanne Clament (122.5 years), and the oldest cat was Crème Puff (38 years). The oldest organism in North America is often cited to be a bristlecone pine in California dated at 5065 years by ring count.. Still others claim that the oldest plant is actually a creosote bush in the Mojave desert, called King Clone, that is shaped as a ring that is 67 feet in diameter. Its age is estimated at 11,700 years. Others dispute this by stating that the oldest cells in these trees and shrubs are no more than a few years old. Explain how a plant can be so old but only have young cells. How old to you think the oldest cells in Jeanne Clament were?