BIO 210 UNIT 3 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+

1 BIO 210 UNIT 3 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ the molecule that stores oxygen in skeletal muscle Correct Answer: myoglobin the neurotransmitter released at the neuromuscular juntion Correct Answer: acetylcholine an immovable joint found only between skull bones Correct Answer: suture a movement which results in the arms being moved away from the body laterally Correct Answer: abduction which of the following does not characterize a synovial joint Correct Answer: a joint cavity filled with fibrous tissue a slightly movable joint composed of a bar of cartilage Correct Answer: symphysis 2 articulations permitting only slight degrees of movement Correct Answer: amphiarthroses all muscle tissue has all the following properties except Correct Answer: automaticity (pacemaker) which of the following is not a usual result of exercise Correct Answer: increase in the number of muscle cells in muscle contraction, calcium acts to Correct Answer: initiate the formation of cross bridges an elaborate network of membranes in skeletal muscle cells that functions in calcium storage is the Correct Answer: sarcoplasmic reticulum creatine phosphate functions in the muscle cell by Correct Answer: storing energy which will be transferred to ADP to make ATP as needed after nervous stimulation of the muscle cell has ceased, the calcium Correct Answer: is removed from the cell or stored until the next contraction 3 which of the following is composed of myosin Correct Answer: thick filaments muscle tone is Correct Answer: a state of sustained partial contraction which of these surrounds the individual muscle cell Correct Answer: endomysium which of the following is not usually associated with a lever system Correct Answer: synarthotic joint which of the following muscles acts in plantar flexion Correct Answer: gastrocnemius the muscle that is responsible for bringing about a particular movement Correct Answer: prime mover a muscle named 'biceps' is named for the Correct Answer: number of orgins an immovable fibrous joint in the skull is a 4 Correct Answer: suture the attachment of a muscle to the movable bone is the Correct Answer: insertion the phase of contraction that refers to the period of time when a muscle does not respond to a seconds stimulus is the Correct Answer: refractory in which type of muscle tissue would you find dense bodies Correct Answer: smooth the release of this element plays a key role in muscle contraction Correct Answer: calcium a sarcomere is the area Correct Answer: between 2 z lines the hip and shoulder joints are examples of which type joint Correct Answer: ball and socket the lambdoidal suture is located between what 2 cranial bones Correct Answer: occipital and parietal 5 in a fully contracted muscle the sarcomere is the length of the Correct Answer: A band which of the following is not required for muscle contractin Correct Answer: acetylcholinesterase the ___ of skeletal muscle fiber is the cell's plasma membrane Correct Answer: sarcolemma which layer of connective tissue covers a fascicle Correct Answer: perimysium a single stimulus that gives one rapid contraction Correct Answer: twitch the control center for the entire body which includes the brain and spinal cord Correct Answer: central nervous system nerves which convey impulses from the periphery to the spinal cord Correct Answer: afferent cells which supply support and protection to the CNS 6 Correct Answer: neuroglia bundles of myelinated neuronal processes in the CNS are Correct Answer: tracts neurons with several dendrites and one axon would be classified by structure as Correct Answer: multipolar these fibers conduct nerve impulses from the CNS to smooth muscles, cardiac muscle, glands, and skeletal muscle Correct Answer: efferent an action potential is generated when a threshold signal reaches the Correct Answer: axon hillock neurons that conduct impulses from the CNS to skeletal muscle are part of which nervous system Correct Answer: somatic cells which are excitable and highly specialized for conduction of nerve impulses are Correct Answer: neurons action potentials are conducted more rapidly when 7 Correct Answer: the axon is myelinated the action potential can jump at the ____ on the myelinated axon in saltatory conduction Correct Answer: nodes of rnavier these supporting cells in the CNS form the myelin sheath Correct Answer: oligodendrocytes the supporting cells that line the ventricles and aid in circulation of cerebrospinal fluid Correct Answer: ependymal cells a bundle of fibers (axons or dendrites) in the PNS are Correct Answer: nerves restoring the membrane potential to the resting state is Correct Answer: repolarization the major ion that moves into the neuron with depolarization Correct Answer: sodium groups of neuron cell bodies in the PNS form Correct Answer: ganglia 8 a neurotransmitter is released at the synapse and generates a depolarization of the postsynaptic neuron. this is an Correct Answer: EPSP the cell that is a special type of macrophage to remove foreign matter in the CNS is the Correct Answer: microglia which of the following is true for mature neurons Correct Answer: they do not undergo mitosis which of the following is not considered a nuerotransmitter Correct Answer: caffeine integration occurs at the Correct Answer: brain or spinal cord a neurotransmitter that is inhibitory would cause the membrane to Correct Answer: hyperpolarize