BIO3303 Midterm #2A - Final_Marking Key_v2.pdf - BIO 3303...

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BIO 3303 Animal Physiology I Student #:__________________________________ Midterm #2 A Name:__________________________________ Page 1of 7Dr. E.M. Standen March 12th, 2018 70min TOPICS: Nervous System and Endocrine System Cellular phones, unauthorized electronic devices or course notes (unless an open-book exam) are not allowed during this exam. Phones and devices must be turned off and put away in your bag. Do not keep them in your possession, such as in your pockets. If caught with such a device or document, the following may occur: academic fraud allegations will be filed which may result in you obtaining a 0 (zero) for the exam. By signing below, you acknowledge that you have ensured that you are complying with the above statement. Signature:_________________________________________________________ Answer on the question sheet in the space provided. This exam is out of 50 marks. Read through the exam fully before starting as short answer and multiple choice questions are throughout.
BIO 3303 Animal Physiology I Student #:__________________________________ Midterm #2 A Name:__________________________________ Page 2of 71.(1 mark) True or False (circle one) Vertebrate endocrine cells have long axons that release chemical messengers into the blood. 2.(5 marks) Draw a neuron and label the soma, dendrites, axonhillock, axon and terminal end. What is the function of each part with respect to passing a signal along the cell (signal processing)? Soma: the cell body of the neuron. This is where the graded potential occurs (0.5 marks) Dendrites: receive the incoming signal (which results in a membrane potential) (0.5 marks) Axon Hillock: initiates action potentials (0.5 marks) Axon: Carries the action potential to the terminal end (0.5 marks) Terminal End: Once the AP reaches the terminal end, neurotransmitter is released (0.5 marks) 3.(3 marks) Draw a single action potential on the below axes. Label the threshold potential and the resting membrane potential. Also note the absolute refractory period and the relative refractory period. 4.(1 mark) Myelination of nerves (pick one): Absolute Refractory Period Relative Refractory Period (1 mark) for the shape of the action potential 0.5 marks 0.5 marks 0.5 marks 0.5 marks Soma Terminal End Axon Hillock 0.5 marks 0.5 marks 0.5 marks 0.5 marks 0.5 marks
BIO 3303 Animal Physiology I Student #:__________________________________ Midterm #2 A Name:__________________________________ Page 3of 7

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