Human Anatomy And Physiology Final Exam Questions And Correct Answers

Human Anatomy And Physiology Final Exam Questions And Correct Answers Anatomy & Physiology Final Exam Q.Identify the brain stem and diencephalon Q.The basic structural and functional unit of a skeletal muscle Sarcomere Q.To establish resting membrane potential Potassium ions diffuse out of the cell. Q.During the process of muscle contraction, calcium ions bind to the Troponin molecules Q.The structure blocking the myosin binding sites on the actin Tropomyosin Q.During muscle contraction, which of these processes requires ATP? *Calcium ions are moved back to the sarcoplasmic reticulum *Cross-bridges are released *Heads of the myosin myofilament are bent toward the center of the sarcomere. *Heat is released Q.A muscle can contract with varying force because Recruitment of additional motor units. Q.Identify the medulla oblongata, the pons and the mid brain. Q.Slow twitch muscle fibers A smaller, produce less force, fatigue very slowly, and have many mitochondria and blood vessels. Q.Fast twitch muscle fibers Are large, produce a lot of force, fatigue quickly, have a lower blood supply and mitochondria Q.The antagonist of the biceps brachii Triceps brachii Q.The antagonist of rectus femoris Semimembranosus and biceps femoris Q.The antagonist of tibialis anterior is Gastrocnemius Q.The antagonist of rectus abdominis Erector Spinae Q.Functions of the muscular system Movement of the body Maintenance of posture Respiration Production of body heat Communication Constriction of organs and vessels Contraction of the heart Q.Muscles that act to aid or stabilize similar movements Synergist Q,Acetylcholine is released from synaptic vesicles into the synaptic cleft, in response to Calcium ions entering the presynaptic terminal. Q.When acetylcholine depolarizes the muscle membrane what happens next The impulse travels over the sarcolemma in all directions. Q.A neurotransmitter is the chemical that crosses the synaptic gap.