BIOS 252 COMP EXAM Questions And Answers

BIOS 252 COMP EXAM Questions And Answers Which of the following fascicular arrangements would best be described as fascicles arranged on only one side of the tendon? A. Unipennate B. Bipennate C. Fusiform D. Circular E. Multipennate - ANSWER -A. Unipennate Which type of synapse involves the secretion of a neurotransmitter across the synapse to stimulate the post-synaptic cell? A. Mechanical B. Nominal C. Electrotonic D. Processing E. Chemical - ANSWER -E. Chemical Your friend nods 'yes' to you, going through flexion, extension, and hyper extension in their enthusiastic response. This movement at the fulcrum represents a A. First-class lever system B. Second-class lever system C. Third-class lever system D. Fourth-class lever system E. Does not represent a lever system - ANSWER -A. First-class lever system The sarcoplasmic reticulum stores A. Oxygen B. Glycogen C. ATP D. Calcium ions E. Glucose - ANSWER -D. Calcium ions Which of the following is NOT a function of smooth muscle tissue? A. Altering the diameter of the respiratory passageways B. Elevating hairs on the arm C. Blinking the eyelid D. Moving food materials along the digestive tract E. Moving urine from the kidneys into the bladder - ANSWER -C. Blinking the eyelid In an isometric contraction, the ,uncle develops tension but does not? A. Shorten B. Lengthen C. Expend energy D. Conduct electrical current E. Exhibit elasticity - ANSWER -A. Shorten _________ is the summation of postsynaptic potentials in response to stimuli that occur at different locations in the membrane of a postsynaptic cell at the same time A. Cortical summation B. Spatial summation C. Temporal summation D. Tactile summation E. Olfactory summation - ANSWER -B. Spatial summation Which of the following molecules energizes the myosin club-head so that it can pull the actin molecule? A. Troponin B. Tropomyosin C. Calcium D. Potassium E. ATP - ANSWER -E. ATP Which of the following muscles is the major agonist for plantar-flexion of the foot A. Gastrocnemius B. Tibialis anterior C. Triceps femoris D. Inferior rectus E. Peroneus - ANSWER -A. Gastrocnemius Which muscle is responsible for movement of the eye medically (adduction)? A. Medial rectus B. Lateral rectus C. Inferior rectus D. Superior oblique E. Inferior oblique - ANSWER -A. Medial rectus EPSPs (excitatory postsynaptic potentials) occur when A. More potassium ions than usual leak out of a cell B. More calcium ions then usual leak out of a cell C. Chloride ions enter the cell D. Sodium channels are opened and sodium enters the cell E. Sodium channels are opened and sodium flows out of the cell - ANSWER -D. Sodium channels are opened and sodium enters the cell In skeletal muscle cells, the transverse tubule is an extension of the A. Sarcomere B. Sarcoplasmic reticulum C. Sarcolemma D. Perimysium E. Terminal cisterna - ANSWER -C. Sarcolemma When compared to a classic lever system, the synovial joints of our Musculoskeletal system play the role of the _________? A. Weight B. Force C. Fulcrum D. Lever E. Resistance - ANSWER -C. Fulcrum. Which of the following event will occur when depolarizing graded potential's reach the membrane of the axon Hillock, causing its membrane potential to reach threshold? A. Ligand-gated Ca++ channels close rapidly B. Voltage-gated Ca++ channels open rapidly C. Ligand-gated Na+ channels close rapidly D. Voltage-gated Na+ channels open rapidly E. Ligand-gated Cl+ channels close rapidly - ANSWER -D. Voltage-gated Na+ channels open rapidly. The attachment of the muscles tendon to the stationary bone is called the _________? ; The attachment of the muscles other tendon to the movable bone is called the__________? A. Origin ; action B. Insertion ; action C. Origin ; insertion D. Stabilizer ; mover E. Insertion ; origin - ANSWER -C. Origin ; Insertion An inhibitory neurotransmitter ________ the postsynaptic membrane