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Portage Learning / BIOD 102 /Biology II Module 3 Exam
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Attempt Time Score LATEST Attempt 1 67 minutes 100 out of 100 Score for this quiz: 100 out of 100 Submitted Jul 19 at 4pm This attempt took 67 minutes.
Question 1 3 /^3 pts Identify each neuron type based on its role:
. bicep contraction . conveys impulse regarding sharp pinch
Your Answer: 1 2 3
. interneuron . motor neuron . sensory neuron 1. connects information in the spinal cord: interneuron 2. bicep contraction: motor 3. conveys impulse regarding sharp pinch: sensory
The charge inside the neuron is . relative to the outside which is positive; negative negative; positive equal Correct! Question 4 3 /^3 pts True or False. The resting membrane potential of neuron is -70mV. Correct! (^) True False Question 5 2 /^2 pts Multiple Choice: Electrical potential within a neuron is maintained by the opening and closing of: GPCR Correct! (^) ion channels RTK
Correct! Correct! Correct! Rising phase Falling phase Undershoot many sodium channels ar sodium channels become inside of cell more negati Question 11 3 /^3 pts Multiple Choice: Neurotransmitters released from the pre-synaptic cell bind to receptors of the post synaptic cell. voltage gated ion gated Correct! (^) ionotropic synaptic cleft Question 12 2 /^2 pts Fill in the blank. Excitatory post synaptic potentials result from 1 ion influx while inhibitory post synaptic potentials result from the influx of 2 ions. Your Answer: 6 /
. sodium . chloride Question 13 3 /^3 pts Multiple Choice: EPSP + EPSP + IPSP + IPSP + EPSP EPSP of postsynaptic cell. This principle is called. depolarization hyperpolarization summation Correct! Question 14 3 /^3 pts Fill in the blank. Neurotransmitter transport channels are present on the 1 2 , and inhibitory enzymes are present in the . Your Answer: 1 2 . pre-synaptic cell . synaptic cleft
Question 17 2 /^2 pts Multiple Choice: Energy to drive the power stroke movement during muscle contraction is provided by: a. ATP hydrolysis b. ADP hydrolysis c. release of ADP and Pi a b Correct! c No answer text provided. Question 18 3 /^3 pts Multiple Choice: The ce ’ll s preferred use of energy is provided by respiration. After all stores have been exhausted, the cell will then use respiration to generate ATP. Correct! (^) aerobic; anaerobic anaerobic; aerobic aerobic; fermentation
Question 19 2 /^2 pts Fill in the blank. Sustained contraction after death, resulting from prolonged cross bridge formation is called. Your Answer: rigormortis rigor mortis Question 20 3 /^3 pts Fill in the blank. has a role in blocking the myosin binding sites on actin molecules. Your Answer: tropmyosin Tropomyosin Question 21 3 /^3 pts Multiple Choice: A single motor neuron and all the muscle fibers it controls is: functional unit (^1) 0/
Calcium binds troponin, e Correct! (^5) 6 7 Power stroke Correct! Correct! Calcium ions actively tra troponin blocks myosin b Question 24 2 /^2 pts (short answer) What enzyme removes acetylcholine from the synaptic cleft? Your Answer: acetylcholineesterase is the enzyme that degrades Ach after it has been released at the synaptic terminal of the presynaptic cell. acetylcholinesterase Question 25 2 /^2 pts Fill in the blank. Tension within a muscle is progressively increased by stimulating more muscle fibers (as if needing to increase force of contraction to hold increasing amounts of weight) through a process called.
Your Answer: recruitment recruitment Question 26 3 /^3 pts Multiple Choice: Increasing the rate of action potentials applied to a motor unit is called: twitch Correct! (^) summation recruitment tetanus Question 27 2 /^2 pts Multiple Choice: Which of the following would be considered reaching the maximum potential of a muscle contraction? summation Correct! tetanus recruitment 1 3/
Multiple Choice: Electrical impulses reach the and then the. Correct! (^) SA node; AV node AV node; SA node ventricle; atria Question 31 4 /^4 pts Put the events in order as they pertain to electrical impulse conduction in the heart. Correct! Correct!
SA node and spreading th delay at AV-node
Correct! 3 Correct! Bundle branches pass to (^4) spread throughout ventr Question 32 3 /^3 pts Multiple Choice: If cardiac output was low, what would you expect to be happening? 15/
increased heart rate Correct! (^) decreased heart rate increased stroke volume Question 33 2 /^2 pts Multiple Choice: Which valves shut during ventricular contraction? semilunar valves aorta Correct! (^) AV valves Question 34 2 /^2 pts Fill in the blank. In cardiac muscle, AcH binds to a , and the result is decreased heart rate. Your Answer: G-protein-coupled receptros GCPR
The purpose is to bring the head closer to the heart to protect brain tissue and drease any type of cellular damage. This is done because lop bp is sensed. When this happens skeletal muscle relaxes. To change your body position so that the head is closer to the heart; it helps blood reach the brain more effectively. Quiz Score: 100 out of 100
