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Anatomy Final #1
| Question | Answer |
|---|---|
| striated and involuntary muscle tissue is classified as ____ muscle? | cardiac muscle |
| What term does NOT describe smooth muscle cells? Skeletal, involuntary, non striated, or visceral | skeletal |
| Muscle tissue has the ability to short when stimulated which is a characteristics known as? | contractilary |
| The heads of momisms filaments are called what when they link the thick and thin filament during muscle contractions? | Cross bridges |
| What is the unstable electrical current that travels down the link of sarcolemma? | action potential |
| According to the sliding filament theory how does muscle contraction occur? | Form crossing bridges and pull thin filaments |
| The point of muscle attachment to a movable or immovable point is what? | Origin |
| What does the term pronated mean? | Palms are facing posterior |
| The orbicularis oris is what type of fascicle arrangement? | circular |
| What muscle is considered the smiling muscle? | Zygomatic major |
| The main muscle of arm abduction is what muscle? | deltoid |
| If someone hurts their hamstring muscle what actions will they not be able to do? | Thigh extension and knee flexion |
| In inherited disease that causes muscles to degenerate and atrophy? | muscular dystrophy |
| Striated and voluntary muscle found in the heart is known as what? | cardiac |
| What is the plasma membrane of skeletal muscles called? | Sacroloma |
| If you have a figure that looks like (muscle tissue figure) what is it? | smooth muscle |
| what creates the alternating light and dark bands? | a band and Iband |
| What filament is anchored to the Z disc? | actin filaments |
| What are the functions of the muscular system? | Mobility, stability, poster, & warmth |
| What is a sarcomere? | The contractile unit between two Z discs |
| What is composed mostly of the protein myosin? | thick filaments |
| What is released into a synaptic cleft to stimulate a muscle to contract? | neurotransmitter |
| What is required to form a cross bridge between a myosin head and an actin filament? | Calcium ions and ATP |
| If a toxin makes sodium channels stay closed, what would happen to a muscle cell exposed to that toxin? | Unable to generate an action potential |
| What is the gap between the axon terminal of a motor neuron and the sarcolemma of a muscle cell? | Synaptic cleft |
| Where are neurotransmitters released from upon stimulation of a nerve impulse? | Axon terminal of a motor neuron |
| What must rush into the cell to promote depolarization? | Sodium ions |
| During muscle contraction, myosin binds to actin filaments to form what? | cross bridges |
| What enzyme breaks down acetylcholine into acetic acid and choline? | Acetylcholinesterase |
| How does a twitch differ from a tetanic contraction? | A twitch is a jerky movement, a tetanic contraction is continuous and prolonged |
| What is movement is antagonistic to extension? | Flexion |
| Which of the following muscles is not found in the hands and/or fingers? | extensor digitorum longus |
| What muscle helios during defecation and childbirth? | Rectus abdominis |
| Which of the following muscles is located on the anterior side of the body? | Pectoralis Major |
| What muscle is a powerful sucking muscle in newborns and is also used for whistling and blowing? | Buccinator |
| What is the main function of the quadriceps? | Knee extension |
| What muscle forms the curved calf of the posterior leg? | Gastrocnemius |
| What muscle group adducts the thigh? | Adductor group |
| What muscle group includes the biceps femoris, semimembranosus, and semitendinosus? | Hamstrings |
| Which muscle consists of two large, flat muscles that cover the lower back? | Latissimus dorsi |
| Moving your arms and legs laterally away from the midline of your body is what type of motion? | Abduction |
| What are antagonist muscles? | A muscle that has an opposite movement of another muscle |
| What condition results if muscles are not used? | atrophy |
| What are the ways to name muscles? | Shape, size, fiber location, direction, location, origin/ insertion, number of attachments, action |
| Smooth muscle produces movement and generates heat? | true |
| The formation of cross bridges requires calcium and ATP? | false |
| The neurotransmitter used in skeletal muscle cells in acetylcholine? | true |
| The striations seen in skeletal muscle are alternating A and I bands? | true |
| Abduction and adduction are antagonistic actions? | true |
| Muscle will hypertrophy if not used continually? | false |
| Aerobic or endurance exercise involves jogging or biking? | true |
| The deltoid is a prime mover of arm adduction? | false |
| Supination and pronation refer to up and down movements of the ankle? | false |
| All muscles have two attachments, the origin and insertion? | true |
| A muscle that crosses the lateral side of a join produces abduction? | true |
Created by:
collinsgabby
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