BE 2350 Chapter : Solutions To Homework 1

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azuremammoth471

15 Mar 2019

School

LSU

Department

Biological Engineering

Course

BE 2350

Professor

All

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Document Summary

Static characteristics occur when instrument"s output is at steady state whereas dynamic characteristics occur in the output reading in response to a measurand (input) change. c. 2. 10 likely error is 1. 5% of 1100 c (the full scale reading), i. e. 16. 5 c. 2. 11 expected shortest rod is 5000 mm 2% = 4900 mm. Expected longest rod is 5000 mm + 2% = 5100 mm. 2. 13 given table of data values are: mv. However, there is a quicker analytical solution in this case since the output e. m. f. increments by exactly 4. 37 mv for each 250 c rise in temperature. The sensitivity can therefore be calculated as 4. 37/250 = 0. 0175 mv/ c. (n. b. The sensitivity is expressed in units of mv/ c since this is what the question asked for, but it would be more appropriate in practice to express the sensitivity as. Given table of data values at a temperature of 20 c is: y x.

Related Questions

Complete Question Text:

1. A patient comes to a doctor complaining of muscle cramping.As part of her examination, the doctor notes that the patient has aslow pulse. Additionally, in the past year the patient has brokenher hand and her arm in seemingly minor falls. What variable do youpredict the patient is having trouble regulating?

Fat
K+
ATP
Ca2+

2. Allen's rule is a biological rule that states that the limbsof warm blooded animals that live in colder climates are differentthan the limbs of the same species of animals in warmer climates.In what way do you expect them to be different and why?

Shorter because a low surface area to volume ratio is best formaintaining heat
Longer because a high surface area to volume ratio is best formaintaining heat. ????
Longer because a low surface area to volume ratio is best formaintaining heat
Shorter because a high surface area to volume ratio is best formaintaining heat.

3. Pepsin is a digestive enzyme. It is made in an inactive form,pepsinogen, which is activated by the acidity of the stomach toself-cleave (cut itself) into a formed called the cleaved molecule.This cleaved molecule is active pepsin, which goes on to cleavemore pepsinogen molecules, leading to a cascade of rapid pepsinactivation (and many more active pepsin molecules). This pathway isan example of:

a feedforward regulationâ¨
a positive feedback loopâ¨
a negative feedback loopâ¨
conditioning

4. The human body's arterial blood pH is tightly maintainedaround 7.4 by buffering agents that bind hydrogen ions to stop anychange in pH. If an acid-base imbalance overcomes the buffersystem, the body changes the ventilation rate, or the rate at whichgas enters or leaves the lungs. Changing the ventilation ratechanges the concentration of CO2 in the blood, which alters the pHof the blood. In this case, the muscles that control theventilation rate are acting as the:

homeostatic challenge
sensor
effector
integrator

5. The human body's arterial blood pH is tightly maintainedaround 7.4 by buffering agents that bind hydrogen ions to stop anychange in pH. If an acid-base imbalance overcomes the buffersystem, the body changes the ventilation rate, or the rate at whichgas enters or leaves the lungs. Changing the ventilation ratechanges the concentration of CO2 in the blood, which alters the pHof the blood. In this case, pH 7.4 is the:

homeostatic challenge
sensor
effector
set point

6. What is the equivalent of the mammalian mouth and nose in therespiratory system of insects?

alveoli
spiracles
tracheoles
epithelial tissue

7. For cells to maintain an appropriate solute concentration,_____ will occur; for cells to maintain an appropriate waterconcentration, _____ will occur.

diffusion, osmosis
osmosis, diffusion
diffusion, facilitated diffusion
diffusion, active transport

8. A marine fish with a cold body temperature that matches itscold surroundings is an example of

negative feedbackâ¨
regulating
conforming
homeostasis

9 Fiddler crabs are small crabs that inhabit intertidal areas.When the tide comes in, the salinity rises to 35ppt and when thetide leaves, the salinity falls to 5ppt. Fiddler crabs can maintaintheir internal salinity at 32ppt when the external environmentranges from 20-40ppt, but cannot regulate at levels higher or lowerthan this. The range of 20-40ppt is the ____________________ forthese animals.

zone of conforming
zone of stability
osmoregulator conforming capacity
positive feedback effector range

10. Imagine you are entering a darkened cavern. You are excited,but also a little nervous. Your heart rate quickens, your bloodpressure rises slightly, and your digestive system activitydecreases as blood is diverted to your musclesâall changes thatprepare you should you need to move rapidly. This type of change isan example of:

positive feedback control
negative feedback control
a failure of homeostasis
feedforward regulation

aquamarinewildebeest773

HELP WITH ALL QUESTIONS

1. Which condition occurs when the pressure in the eye is too high?

2. What lobe of the brain is required for vision?

3. Which division of the nervous system is "automatic"?

4. Which tube connects the ear with the back of the throat?

5. Which division of the nervous system is responsible for resting and digesting?

6. The cleft area between two neurons is called?

7. The photoreceptors more concentrated around periphery of the fovea are?

8. Which humor fills the anterior chamber?

9. The primary sensory area of the brain is located in which lobe?

10. The photoreceptor for color is called?

11. The unmyelinated area of a myelinated axon is called the node of?

12. The bundle of fibers that connects the hemispheres is called the?

13. A part of the brain associated with aggressiveness, and found to be larger than normal in sociopaths/psychopaths, is the?

14. The primary motor cortex is in which lobe of the brain?

15. Which lobe of the brain is essential to executive functions?

16. Neurons receive messages at their?

17. The part (not lobe) of the brain essential to memory is the?

18. What is commonly known as the âwhite of the eyes.â?

19. Neurons transmit information in the form of a nerve impulse along their?

20. The photoreceptors that work better under conditions of low light are?

21. Which humor fills the posterior chamber?

22. The fancy scientific term that includes all bones of the middle ear is the term?

Instructions:

Read the scientific inquiry below. Use the data and your scientific knowledge, to complete the questions in each of the sections on the rest of this document. Place your answers, in the space provided and bold or change the color of the text of your answer. Once the assignment is complete, save it as a PDF document file. To submit this assignment, email the completed PDF document to your instructors email address by the due date/time. This assignment is to be done individually. Per the Angelina College student handbook, plagiarism will be will not be tolerated.

Scientific Inquiry:

A farmer wishes to determine which of the two fertilizers, Brand X or Brand Y, helps his corn crops grow at a faster rate in a five-week period of time. He asks his daughter, whom is a college freshman taking introductory biology, to design an experiment to help him test each fertilizer. They decide to grow three different crops of corn, each grown in a controlled environment, receiving the same amount of sunlight, same climate, soil type, and water. Crop 1 will receive no fertilizer during watering. Crop 2 will receive Brand X fertilizer while watering. Crop 3 will receive Brand Y fertilizer while watering. The farmer and his daughter performed the experiment and collect data on each fertilizer over a five-week period. Use the data, represented in Table 1, to complete the following assignment.

Table 1. Average height of corn plants when treated with Brand X or Brand Y fertilizer compared to corn plants not treated with fertilizer (control).

Time (T) in weeks	Control (cm)	Brand X (cm)	Brand Y (cm)
0	0	0	0
1	1.3	1.4	1.2
2	2.4	2.7	2.3
3	4.2	8.3	7.3
4	6.8	12.4	8.2
5	8.7	16.8	11.6

Section 1: Representation

Define each term or variable, with respect to the scientific inquiry.

Independent variable-

Dependent variable-

Control group-

Experimental group(s)-

Hypothesis-

Write the equation to determine the average growth rate, with the appropriate values included, for each corn crop type (control, Brand X, and Brand Y). Use the equation shown below.

Growth rate = (T₅ â T₀)/5

Control =

Brand X =

Brand Y =

Section 2: Calculation

Solve the equations generated, in question 2, for each corn crop type. You must show your work, in the space below, for full credit.

Control =

Brand X =

Brand Y =

Section 3: Interpretation

Analyzing the data table and the calculated growth rates, complete the following questions.

Which crop type grew the fastest? Explain your answer using factual information.

Which plant was tallest? Explain your answer using factual information.

What can you conclude about the treatment of fertilizer on crop growth? Explain your answer using factual information.

Section 4: Application and Analysis

What could happen if the temperature were not controlled during the experiment? Would this impact treatment effectiveness on plant growth? Explain your answer.

Do you think the same outcome would occur if pine trees were used? Explain your answer.

If a particular fertilizer works on corn crops, should we be using that fertilizer on all plants? Why or why not?

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BE 2350 Chapter : Solutions To Homework 1

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