Exam 2 (white) Spring 201w-ans

Exam 2 (white) Spring 201w-ans - Name ClassTime Second...

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

View Full Document Right Arrow Icon
Name__________________________ Class Time______________________ Second Exam (White)- BIO 365R Spring Semester 2010 There are 60 true-false and multiple choice questions, each worth 1.43 points Questions 1-4 - Mark  A       on the SCANTRON if the answer is TRUE, and  B  on the  SCANTRON if the answer is False about the quantal hypothesis:   1)__A_ Was proposed by Bernard Katz who won the Nobel Prize for his studies of synaptic  transmission 2) _B__ Holds that synaptic transmission occurs through the release of one molecule of  transmitter, where each molecule constitutes a quantum of transmitter that generates a  miniature end plate potential. 3) _A___ Holds that each end plate potential is the result of the simultaneous release from  the nerve terminal of several quanta of ACh, where each quantum has the ACh content  that produces one miniature end plate potential. 4) __A_ Was supported by the discovery of the presence of synaptic vesicles. Large numbers of  synaptic vesicles were seen in electron micrographs of the neuromuscular junction and some  were seen fused to the membrane of the axon terminal, suggesting that these vesicles were each  releasing one quantum of transmitter into the synaptic cleft. 5) Axon B is stimulated and you know that it releases GABA causing the post synaptic potential that  you see in trace A below.  Next, current is passed from the electrode that impales the cell depicted  below thereby  altering its membrane potential from it’s normal resting potential.  When axon B is  stimulated while current is being passed into the postsynaptic cell, the release of GABA from axon B  causes a synaptic response seen in trace B below.  Did the current passed by the electrode in the cell  change the membrane potential to a value more positive or more negative than the reversal potential  for GABA?  Mark the Answer on your Scantron A) More negative B ) More positive   C) Injection of current did not change the membrane potential  1
Image of page 1

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

View Full Document Right Arrow Icon
Name__________________________ Class Time______________________ Question 6-  The term that refers to all of the motoneurons that provide innervation to a muscle  is (choose the correct answer):  A) motoneuron pool B) motor unit C) motor endplate D) motor innervation pattern Questions 7-10   Match the agents in the right-hand column with the things that they act  on that are given in the left-hand column. 7)___B__ Na+ channel A) atropine 8) __C___ K+ channel B) Tetrodotoxin 9) ___D__ Nicotinic acetylcholine receptor C) TEA 10) __A__ Muscarinic acetylcholine receptor D) curare Questions 11-14    (indicate which ion is the correct answer for the questions below) 2
Image of page 2
Name__________________________ Class Time______________________ T im e in m sec 0 re s ting po ten tia l 05001000 1 2 3 A) K+ B) Ca++ A) Na+ C) Cl- 11) Pacemaker fibers in the SA and AV nodes have autorhythmicity, as shown above.
Image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern