QUESTION 9 What special structure do cardiac muscles have to distinguish it from the other kinds and types of tissues? striations lacunae intercalated discs goblet cells

Question one: Which of the following is TRUE concerning motor units? Group of answer choices None of these choices accurately describes a motor unit A motor unit consists of a motor neuron and all of the muscle fibers it innervates A motor unit consists of a motor neuron and all of the muscle cells within the epimysium A motor unit consists of a motor neuron and all of the skeletal muscle fibers connected by gap junctions pick one answer only   question 2: A person is getting their blood type tested. The addition of anti-B antibodies causes agglutination, but not the addition of anti-A antibodies. The individual's blood type is type A type AB type B type O pick one answer only

QUESTION 1 Which of the following types of blood vessels may have smooth muscle in their walls? Select ALL correct answers: Veins Venules Capillaries Arteries Arterioles D0000

Where are cardiac muscle cells found in the heart? O myocardium pericardium O endocardium O great vessels cardiac skeleton

QUESTION 7 The first heart sound is due to the: O closing of the atrioventricular valves closing of the semilunar (V-a) valves O opening of the atrioventricular valves O opening of the semilunar (V-a) valves O QUESTION 8 Which muscle types are innervated by motor neurons? O smootoh and cardiac O only smooth O cardiac and skeletal O only skeletal O smooth, cardiac, and skeletal O smooth and skeletal O only cardiac

Question 2 During which step of a muscle contraction cycle is ATP needed? when myosin head does a power stroke and release of calcium ions into sarcoplasm when myosin head detaches from actin and release of calcium ions into sarcoplasm when myosin head does a power stroke and pumping of calcium ions back into SR when myosin head detaches from actin and pumping of calcium ions back into SR

Cardiac muscle cells produce more force when _____.   A they have already shortened to less than half of their resting length when they are stimulated   B more calcium is released into the fluid around their actin and myosin filaments   C they are stimulated to contract before their refractory period has ended   D more acetylcholine is released from nearby neurons

In which type(s) of muscle cells does each cell have its own neuromuscular junction?                                 skeletal only                                 unitary smooth and skeletal                                 skeletal and cardiac       2. The follow is NOT true of CARDIAC muscle fibers:        - connected by gap junctions       -  include pacemaker cells that can produce produce action potentials at regular intervals without innervation        - without calcium cross bridge cycles will not occur and fibers will not shorten        - each cell in a motor unit has a neuromuscular junction with the same motor neuron                                 actin and myosin filaments are arranged in sarcomeres                                 produce greater force when stretched than at resting length   3. Match the following:   -Skeletal muscle   -Cardiac muscle   -Smooth muscle Can maintain prolonged isometric contractions with very little energy Striated muscle fibers with gap…

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place in correct order 1. ACH binds to receptors on the postsynaptic membrane 2. AP travels along the sarcolemma and T tubules 3. Ca++ ion bind to troponin 4.  Ca++ ions diffuse into the sarcoplasm 5. voltage-gated Ca++ ion channels in the sarcoplasmic reticulum open