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BIOS 252 MIDTERM EXAM REVIEW WITH ANSWERS

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Midterm Review 1. T Tubules are extensions of the in skeletal muscle? a. Sarcolemma 2. CN III innervates with of of the following muscle? a. Medial Rectus 3. The brain and spinal chord are part o... f the nervous system? a. Central 4. A wheelbarrow is an example of a class lever? a. Second 5. The muscle contraction pulling on its insertion point, corresponds to what part of the lever system? a. Effort 6. A synovial joint corresponds to what part of the lever stem? a. Fulcrum 7. When would voltage-gated Sodium channels open rapidly? a. When a depolarizing graded potential makes the axon membrane depolarize to threshold 8. Which of the following muscle closes the lips? a. Orbicularis Oris 9. Synergists prevent unwanted movements during an action, or aid the agonist during the movement. a. True 10. EPSP stands for a. Excitatory postsynaptic potential 11. EPSPs occur when a. Sodium channels are opened and sodium enters the cell 12. The Platysma muscle is a muscle of mastication a. FALSE 13. The type of muscle contraction where the muscle contracts but exhibits no change in length is called a. Isometric contraction 14. Calcium is released from the SR when an action potential opens gated ion channels located in the a. T tubules 15. The neurotransmitter found at synapses between the motor neurons and human skeletal muscles, or at the neuromuscular junction is a. Acetylcholine 16. The neurotransmitters that function primarily in the CNS are dopamine and serotonin a. TRUE 17. A propagated change in the memb [Show More]

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