BIO 252 MIDTERM REAL EXAM WITH 100% ANSWERD CORRECTLY QUESTION GUARANTEED A+ GRADE

BIO 252 MIDTERM REAL EXAM WITH 100% ANSWERD CORRECTLY QUESTION GUARANTEED A+ GRADE 1. When compared to a class lever system, the synovial joints of our musculoskeletal system play the role of the . o resistance o force o lever o fulcrum o weight 2. Which of the following events will occur when depolarizing graded potentials reach the membrane of the axon hillock, causing it’s membrane potential to reach threshold? o Ligand-gated Cl- channels close rapidly o Voltage-gated Na+ channels open rapidly o Ligand-gated Na+ channels close rapidly o Ligand-gated Ca+ channels close rapidly o Voltage-gated Ca+ channels open rapidly 3. The attachment of a muscle’s tendon to the stationary bone is called the ; the attachment of the muscle’s other tendon to the movable bone is called the . o Origin; insertion o stabilizer; mover o insertion; origin o origin; action o insertion; action 4. Which of the following fascicular arrangements would best be described as fascicles arranged on only one side of the tendon? o Circular o Fusiform o Multipennate o Bipennate o Unipennate 5. Which type of synapse involves the secretion of a neurotransmitter across the synapse to stimulate the post-synaptic cell? o Electrotonic o Mechanical o Chemical o Nominal o Processing 6. Your friend nods “yes” to you, going through flexion, extension and hyperextension in their enthusiastic response. This movement at the fulcrum represents a . . . o It does not represent a lever since the head is attached via a gymbol o Fourth-class lever system o First-class lever system o Second-class lever system o Third-class lever system lOMoARcPSD| 7. The sarcoplasmic reticulum stores o Oxygen o Glycogen o Glucose o ATP o Calcium Ions 8. Which of the following is NOT a function of smooth muscle tissue? o Moving urine from the kidneys into the bladder o Moving food materials along the digestive tract o Blinking the eyelid o Elevating hairs on the arm o Altering the diameter of the respiratory passageways 9. In an isometric contraction remains the same. o Expenditure of energy o Tension o Length of the muscle o Electrical current o Ionic concentration 10. is the summation of postsynaptic potentials in response to stimuli thatoccur at different locations in the membrane of a postsynaptic cell at the same time. o Temporal summation o Spatial summation o Tactile summation o Cortical summation o Olivary summation 11.Which of the following molecules energizes the myosin clubhead so that it can pull the actin molecule? o ATP o Potassium o Tropomyosin o Calcium o Troponin 12.Which of the following muscles is the major agonist for plantar-flexion of the foot? o Gastrocnemius o Tibalis-anterior o Peroneus o Biceps Femoris o Inferior Rectus 13. Which muscle is responsible for the movement of the eye medially (adduction)? o Superior oblique lOMoARcPSD| o Lateral rectus o Medial rectus o Inferior oblique o Inferior rectus 14. EPSPs (excitatory postsynaptic potentials) occur when . . . o Sodium channels are opened and sodium enters the cell o Chloride ions enter the cell o Sodium channels are opened and sodium flows out of the cell o More calcium ions than usual leak out of a cell o More potassium ions than usual leak out of a cell 15. In skeletal muscle cells, the transverse tubule is an extension of the . . . o Sacromere o Sarcoplasmic reticulum o Terminal cislema o Sarcolemma o Perimysium 16.An inhibitory neurotransmitter the postsynaptic membrane . . . o Reverses the polarity of the o Repolarizes o Hyperpolarizes o Moves channels to the internal axonal membrane o Depolarizing 17. cells function as immune/phagocytic cells within the central nervous system. o Microglial o Oligodendroglial o Ependymal o Astrocyte