{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

EBME201 Exam1_2006Key

# EBME201 Exam1_2006Key - EBME201 Fall 2006 Exam 1 Name Email...

This preview shows pages 1–4. Sign up to view the full content.

EBME201, Fall 2006 Exam 1 Name_______________________________ Email_______________________________ Read carefully as many questions have multiple parts . Always show your work and include units if you want credit.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
A B A B 1) What is the resistance between point A and point B. What is the conductance? (include units and show your work)- Amar Req = R1 + R2 = 500 ohms (2 pts: 1 for work, 1 for ans) G = 1/Req = 1/500 S (2Pts: 1 for work, 1 for ans) 2) In the diagram above, if the current is positive in the direction shown by the arrow, is the voltage higher at point A or B?_________. If the current is 500mA, what is the voltage drop across the pair of resistors? (Include units and show your work)- Amar V=IR => 500 mA * 500 ohms = 250V or 250,000 mV (2 pts: 1 for work, 1 for ans) 3) What is the resistance between point A and point B. What is the conductance? (include units and show your work)- Amar 1/R = 1/R1 + 1/R2 = 20/3 ohms (2 pts: 1 for work, 1 for ans) G = 1/R = 3/20 S (2 pts: 1 for work, 1 for ans) 4) Draw a diagram of the phospholipid bilayer that makes up a cell membrane. Include an example of an integral membrane protein and a peripheral membrane protein in your diagram. Label which parts of the membrane are hydrophobic and which parts are hydrophilic. -Amar 5 pts total: 1 for each -correct drawing & labeling of integral protein : spanning entire bilayer -correct drawing & labeling of peripheral protein: 1 side of bilayer only -hydrophobic portion of membrane – inner part of membrane -hydrophilic portion of membrane – outer part of membrane -accurate depiction of the lipid bilayer 400Ω 100Ω 10Ω 20Ω
5) List 3 types of glial cells.- Amar 6pts total, 2 for each answer - Astrocytes -Oligodendrocytes -Schwann Cells 6) Describe two functions of glial cells.- Amar 4pts total, 2 for each answer, any of the following two were accepted: - Blood brain barrier - Mylination - Nutrient support - structural support - facilitate conduction 7) The main function of the nucleolus is production and maturation of _ ribosomes (2pts) ___- Amar 8) The ___ Golgi Apparatus ( 2pts) __ is a stack of membrane-bound vesicles that are important in packaging macromolecules for transport elsewhere in the cell. Does this packaging need to be selective? Yes or No___ Yes (1 pt) ____ -Amar 9) Membranous organelles such as mitochondria are transported through the nerve by __ fast (2pts) __axonal transport along which cytoskeletal structures? __ microtubules (2 pts) _. Where does the energy for this process come from?__ ATP (2 pts) ______ -Amar 10) The main function of mitochondria is to produce ____ ATP** ________ from ________ ADP** ________. Briefly describe how the mitochondria achieve this? -Amar 6pts total: 2 pts for each -A proton (H+) gradient is generated in the cristae of the mitochondria. -Energy is generated from these protons moving down their concentration gradient -This energy is used to phosphorylate ADP into ATP **Any number of answers were accepted for the fill in the blanks (e.g. energy from food) as long as the explanation below made sense and included ATP from ADP.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern