Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
ANT Chpt 8 & 9
Anatomy Chapters 8 & 9
| Question | Answer |
|---|---|
| The sarcolemma of muscle cells is equivalent to the ___ of other cells. | plasma membrane |
| The connective tissue component that surrounds fascicles is the? | perimysium |
| Which of the following statements about skeletal muscle tissue is NOT true? | Skeletal muscle fibers contain gap junctions that help conduct action potentials from one fiber to another. |
| network of tubules that stores calcium = ? | sarcoplasmic reticulum |
| pigment that stores oxygen = ? | myoglobin |
| composed of myosin = ? | thick filaments |
| composed of actin, tropomyosin, and troponin = ? | thin filaments |
| tunnel-like extensions of sarcolemma = ? | transverse tubules |
| The reddish color of slow oxidative and fast oxidative-glycolytic skeletal muscle fibers is due to? | the large amount of myoglobin |
| You begin an intensive weightlifting plan bc you want to enter a weightlifting contest. During the activity your skeletal muscles will obtain energy (ATP) primarily through? | anaerobic glycolysis |
| Muscle contractions are smooth, coordinated movements because of ? | motor unit recruitment |
| When ATP in the sarcoplasm is exhausted, the muscle must rely on ___ to quickly produce more ATP from ADP for contraction. | creatine phosphate |
| A motor unit consists of? | a motor neuron and all of the muscle fibers it stimulates |
| Thick filaments? | have myosin heads used for the power stroke. |
| The chemical that prevents the continuous stimulation of a muscle fiber is | acetyl cholinesterase |
| Which of the following is NOT associated with muscle fatigue? | decrease in lactic acid levels |
| Which of the following binds to Ca2+ ? | troponin |
| Skeletal muscles are named using several characteristics. Which characteristic is NOT used to name skeletal muscles? | speed of contraction |
| Arrange the following in the correct order for skeletal muscle fiber contraction. | (Chapter 8 #16) 3, 4, 1, 2, 5, 6 |
| What would happen if ATP were suddenly unavailable after the sarcomere had begun to shorten? | The myosin heads would be unable to detach from actin. |
| extends from the thick filaments = ? | myosin heads |
| contain myosin-binding sites = ? | actin molecules |
| dense area of protein that separates sarcomeres = ? | z discs |
| contain acetylcholine | A band |
| striated zone of the sarcomere composed of thick and thin filaments = ? | synaptic vesicles |
| space between axon terminal and the sarcolemma = ? | synaptic cleft |
| striated zone of the sarcomere composed of thin filaments only = ? | I band |
| region of sarcolemma near the adjoining axon terminal = ? | motor end plate |
| extends and laterally rotates thigh at the hip joint = ? | gluteus maximus |
| adducts, rotates, and flexes thigh at the hip joint = ? | adductor longus |
| compresses abdomen and flexes vertebral column = ? | rectus abdominis |
| flexes leg at knee joint and extends thigh at hip joint = ? | hamstring group |
| flexes and abducts wrist joint = ? | flexor carpi radialis |
| extends phalanges | extensor digitorum |
| flexes, adducts, and rotates arm medially at shoulder joint = ? | pectoralis major |
| extends leg at the knee and flexes thigh at hip joint = ? | quadriceps femoris group |
| plantar flexes foot at ankle joint and flexes leg at knee joint = ? | gastrocnemius |
| dorsiflexes and inverts foot = ? | tibialis anterior |
| abducts, flexes, extends, and rotates arm at shoulder joint = ? | deltoid |
| dependent on contracting fibers; can elevate clavicle, depress or elevate scapula = ? | trapezius |
| elevates mandible; closes mouth = ? | masseter |
| wrinkles skin of forehead horizontally as in a look of surprise = ? | frontal belly of occipitofrontalis |
| extends, adducts, and rotates arm medially at shoulder joint; draws arm downward and backward = ? | latissimus dorsi |
| flexes and supinates forearm at elbow joint = ? | biceps brachii |
| works with prime mover to reduce unnecessary movement = ? | synergist |
| muscle in a group that contracts to produce desired movement = ? | prime mover |
| stationary end of a muscle = ? | origin |
| muscle that has an action opposite to that of another muscle = ? | antagonist |
| helps stabilize the origin of the prime mover = ? | fixator |
| the end of a muscle attached to the movable bone = ? | insertion |
| Which of the following are incorrectly matched? | autonomic nervous system: includes parasympathetic, sympathetic, an denteric divisions |
| consists of one fused dendrite and axon = ? | unipolar neuron |
| found primarily in the sensory organs such as the eye and ear = ? | bipolar neuron |
| most common neuron in the CNS = ? | multipolar neuron |
| contains several dendrites and one axon = ? | multipolar neuron |
| dendrite functions as a sensory receptor for touch, temperature and pain = ? | unipolar neuron |
| consists of one dendrite and one axon = ? | bipolar neuron |
| The release of neurotransmitters from the synaptic vesicles is dependent on the presence of ___ in the synaptic end bulb. | calcium |
| The type of cell that produces myelin sheaths around axons in the CNS is the? | oligodendrocyte |
| White matter in the CNS is a ? | tract |
| Which of the following is NOT true concerning the repair of nervous tissue? | If the cell body is not damaged, neurons the in the CNS may be able to repair themselves. |
| In a resting neuron | the sodium-potassium pumps help maintain the low concentration of Na+ inside the cell. |
| In the depolarization phase of a nerve impulse, voltage-gated ion channels open, resulting in a(n)? | rush of Na+ into the neuron. |
| If a stimulus is strong enough to generate an action potential, the impulse generated is of a constant size. A stronger stimulus cannot generate a larger impulse. This is known as? | the all-or-none principle |
| Place the following events in the correct order of occurrence: | Chapter 8 (#10) 3, 1, 4, 5, 2 |
| Saltatory conduction occurs | at the nodes of Ranvier |
| The speed of nerve impulse conduction is increased by | myelination |
| For a signal to be transmitted by means of a chemical synapse from a presynaptic neuron to a postsynaptic neuron | the postsynaptic neuron must contain neurotransmitter receptors |
| What would happen at the postsynaptic neuron if the total inhibitory effects of the neurotransmitters were greater than the total excitatory effects? | No nerve impulse would be generated. |
| inhibitory amino acid in the CNS = ? | GABA |
| a gaseous neurotransmitter that is not packaged into synaptic vesicles = ? | nitric oxide |
| excitatory amino acid in the CNS = ? | glutamate |
| body's natural painkillers = ? | endorphins |
| helps regulate mood and sleep = ? | serotonin |
| neurotransmitter that activates skeletal muscle fibers = ? | acetylcholine |
| the portion of a neuron containing the nucleus = ? | cell body |
| rounded structure at the distal end of an axon terminal = ? | synaptic end bulb |
| highly branched, input part of a neuron = ? | dendrite |
| sac in which neurotransmitter is stored = ? | synaptic vesicles |
| neuron located entirely within the CNS = ? | interneuron |
| long, cylindrical process that conducts impulses toward another neuron = ? | axon |
| produces myelin sheath in PNS = ? | Schwann cell |
| unmyelinated gap in the myelin sheath | node of Ranvier |
| substance that increases the speed of nerve impulse conduction = ? | myelin sheath |
| neuron that conveys information from a receptor to the CNS = ? | sensory neuron |
| neuron that conveys information from the CNS to an effector = ? | motor neuron |
| bundle of many axons in the PNS = ? | nerve |
| bundle of many axons in the CNS = ? | tract |
| group of cell bodies in the PNS = ? | ganglion |
| group of cell bodies in the CNS = ? | nucleus |
| substance used for communication at chemical synapses = ? | neurotransmitter |
Created by:
dtgs2010
Popular Anatomy sets