PSL EXAM 3 with correct answers 2024

skeletal muscle correct answers attached to the skeleton; striated, voluntary. contains lots of mitochondria because skeletal muscle cells are doing a lot of cellular respiration so they can make ATP to contract; lots of nuclei. cardiac muscle correct answers heart muscle; striated (more branching/spaces between), involuntary smooth muscle correct answers G1 tract; non-striated, involuntary. GI tract (guts), esophagus, stomach, small/large intestine, eyes (iris, ciliary body), uterus, urinary bladder, etc. striations correct answers light & dark bands; not anatomical, manifestation of staining under microscope. composed of actin & myosin filaments voluntary correct answers conscious commands cause skeletal muscles to contract involunatary correct answers subconscious controls the heart (cardiac muscle) non-striated correct answers feels smooth instead of ribbed, responsible for subconscious/autonomic nervous system controls (bundle of muscle cells) muscle facicles correct answers big circles within a muscle organ; surrounded by perimysium epimysium correct answers dense, very strong connective tissue surrounding skeletal muscle organ; contains vasculature & nerves perimysium correct answers dense connective tissue found surrounding individual muscle fascicles (peri: surrounding); contains vasculature & nerves endomysium correct answers loose connective tissue surrounding individual muscle fibers within muscle fascicles. just visceral to endomysium is the plasma membrane of the muscle cell (sarcolemma). 1) vasculature, 2) nerve terminals/synaptic knob, 3) myosatellite cells muscle fiber (cell) correct answers skeletal muscle cell (super thin); circles within fascicle, also called myosite/myofiber/skeletal muscle/ cell. surrounded by endomysium sarcomlemma correct answers plasma membrane of muscle cell axon correct answers from motor neuron; pierces into muscle getting into