Muscle Histology
What makes up a triad?
Two terminal cisternae of the sarcoplasmic reticulum and a transverse (t-tubule) from the sarcolemma
Which muscle originates from the Occipital bone and mastoid process of temporal bone and inserts onto the epicranial aponeurosis (galea aponeurotica)?
Occipitalis (occipital belly) of Epicranius
Which muscles originate from the Superior border of rib below and insert into the inferior border of the rib above?
Internal intercostals
Which muscle originates from the Superior nuchal line of occipital bone, ligamentum nuchae, and spines of C7–T12 and inserts onto the Clavicle, acromion, and spine of scapula?
Trapezius
Which muscle originates from the pubic crest and symphysis and inserts onto the linea aspera of the femur
Adductor longus
What enzyme degrades acetylcholine in the synaptic cleft?
Acetylcholinesterase
Which muscle originates from the zygomatic bone and inserts onto the lateral corners of the lip and fibers of orbicularis oris?
Zygomaticus major
Which muscle originates on Ribs 5–12 and inserts onto the iliac crest and linea alba?
External abdominal oblique
Which muscle originates from Spines of T2–T5 and inserts onto the Vertebral border of scapula inferior to spine?
Rhomboid major
Which muscle originates from the iliac crest, sacrum, coccyx, and sacrospinal aponeurosis?
Gluteus maximus
Influx of which ion prompts exocytosis of acetylcholine?
Calcium
Which muscle originates from the Maxilla and zygomatic arch and inserts into the ramus and body of the mandible?
Masseter
Which muscle originates on the Xiphoid process of sternum, costal cartilages and adjacent portions of ribs 7–12, lumbar vertebrae and their intervertebral discs and inserts onto the central tendon?
Diaphragm
Which muscle originates from the Inferior angle of scapula and inserts onto the intertubercular sulcus?
Teres major
Which muscle originates from the superior pubic ramus and inserts onto the pectineal line of the femur?
Pectineus
In which type of contraction is the tension changing, but the length of the muscle remains the same?
Isometric
Which muscle originates from the manubrium of sternum and the clavicle and inserts onto the mastoid process of the temporal bone and superior nuchal line of the occiput?
Sternocleidomastoid
Which muscle originates from the Iliac crest and iliolumbar ligament and inserts into L1-L4 and the inferior border of rib 12?
Quadratus lumborum
Which muscle originates on the Subscapular fossa of scapula and inserts onto the lesser tubercle of the humerus?
Subscapularis
Which muscle originates on the fibula and inserts onto the distal phalanx of the great toe?
Extensor hallucis longus
Cross bridge cycling would not be possible without the presence of this organic molecule
ATP
What are the four suprahyoid muscles?
Geniohyoid, mylohyoid, digastric, stylohoid
What are the three muscles that form the erector spinae?
Iliocostalis, longissimus, spinalis
Which muscle originates from the medial epicondyle of the humerus and inserts onto the middle phalanx of digits 2 - 5?
Flexor digitorum superficialis
Which muscle originates from the fibula, tibia, and interosseous membrane and inserts onto metatarsals II - IV, the cuneiforms, and the navicular?
Tibialis posterior