Assignment Question
1) Your friend has suffered a “broken nose”. Which bones could potentially be injured in a fracture involving the nose and the nasal cavity? Why do you think a fracture involving the bones of the nasal cavity could affect the cranial cavity? (Hint: which bones of the nasal cavity connect to the cranial cavity?) Draw a mid sagittal section of the skull and label the bones of the nose and nasal cavity. Upload your labeled drawing here. (7 points) 2) Draw and label a specific long bone. Name the bone and label at least 7 specific surface features. Take a photo of your labeled drawing and embed it here. (7 points) 3) Which parts of the axial and appendicular skeleton come together to form the pelvis? Describe the bones of the pelvis and how they articulate. List the specific characteristics that can make one particular pelvis better equipped for childbearing compared to another pelvis that is not as well suited for childbearing. (Note: For this question, the term “childbearing” includes both supporting the weight of the fetus during pregnancy and passage of the newborn through the pelvic outlet.) (6 points) 4) How does joint mobility relate to joint stability? Give specific examples of different types of articulations and how they function to explain your answer. (5 points) 5) Describe the knee joint. Make sure to classify the knee joint both structurally and functionally. Name all the specific ligaments and supporting structures and their individual functions. (5 points) 6) Describe the sequence of events that cause muscle contraction, beginning with when the impulse arrives at the neuromuscular junction, through relaxation of contraction. Your answer should include a description of the specific contraction cycle events that take place at the molecular level. Draw and label a diagram of a sarcomere to illustrate the filaments and bands and upload it here. (10 points) 7) Describe the origins, insertions, and action(s) of the following muscles. Instead of listing your answers, put them into complete sentences and describe the movement created by each muscle. Be sure to include the joint(s) and movement(s). For example, “The biceps brachii originates on the scapula at the supraglenoid tubercle and coracoid process and inserts on the radius at the radial tuberosity. As the biceps brachii contracts and shortens, the radius moves closer to the humerus causing forearm flexion at the elbow.” (5 points) – Sternocleidomastoid – Rectus femoris – Tibialis anterior – Masseter – Erector spinae 8) Describe the muscles involved in doing a push-up. Start by listing the articulations at which there is movement for this activity. What specific movements (muscle actions) are occurring at these articulations? Name the primary muscles that contract to create each of these movements. (5 points)
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