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rasmussen MA278/BSC2346 Module 5 midterm 2019 Graded • Question 1 1 out of 1 points Wolff’s law of bone states that bone density is directly related to the dietary ingestion of calcium. True False • Question 2 1 out of 1 points Which statement is true regarding osteoporosis? It is loss of density of the matrix in spongy bone only It is most commonly diagnosed in pre-menopausal women Vitamin D plays an important role in its prevention Vertebrae and femoral neck fractures are a common complication in males only • Question 3 1 out of 1 points Osmosis is the movement of random molecules from a low to high concentration across a selectively permeable membrane. True False • Question 4 1 out of 1 points Acetylcholine molecules must bind to troponin in order for the muscle contraction process to occur. True False • Question 5 1 out of 1 points Which statement is true of the glenohumeral (shoulder) joint? The glenoid cavity can be found on the clavicle The bones of the shoulder joint include the humerus, scapula and sternum The shoulder is among the most stable joints in the body The SITS muscle tendons help stabilize the shoulder joint • Question 6 1 out of 1 points A motor unit is composed of all the muscle fibers that one motor neuron innervates. True False • Question 7 1 out of 1 points Which choice is true regarding bone tissue? Trabeculae are found within compact bone The periosteum is the inner, blood cell producing portion of bone Osteocytes reside within a little open space called lacuna within bone tissue One of the organic materials of bone include calcium • Question 8 1 out of 1 points Parathyroid hormone will cause an increase activity in which of the following cells? Osteoclasts Osteoblasts Osteocytes Osteogenic cells • Question 9 1 out of 1 points Which of the following choices contains ridges that are ultimately responsible for fingerprints? Flexure lines Dermal papillae Friction ridges Reticular layer • Question 10 1 out of 1 points Which cellular organelle is responsible for the production of ATP? Mitochondria Lysosome Gogli apparatus Nucleus • Question 11 1 out of 1 points Which statement is true of muscular tissue and/or muscle contraction? A sarcomere consists of thin filaments only The sarcoplasmic reticulum stores the acetylcholine molecules utilized for muscle contraction Slow oxidative muscle fibers contain myoglobin giving these fibers a reddish color The passing of the action potential from the nerve to the muscle cell occurs because the nerve is in direct contact with the muscle cell • Question 12 1 out of 1 points Which of the following composes the majority of the epidermis? Melanocytes Keratinocytes Basal cells Osteocytes • Question 13 1 out of 1 points A bursa can reduce the friction of a tendon rubbing over a bone. True False • Question 14 1 out of 1 points Which statement is true regarding muscles? The antagonist muscle or muscle group opposes a movement of a particular muscle or muscle group A sprain is damage to a muscle or its tendon The insertion point of a muscle is attached to the fixed bone during joint motion All muscles have multiple origin points • Question 15 1 out of 1 points Aerobic respiration creates lactic acid as a byproduct but produces far more ATP than anaerobic respiration. True False • Question 16 1 out of 1 points Which statement is true regarding the skeletal system? Compact bone of flat bones in adults is commonly filled with red bone marrow External stresses placed on bone (such as exercise) will decrease the bone matrix density Osteocytes are “connected” to one another via canaliculi Osteoclasts secrete collagen fibers to increase bone density • Question 17 1 out of 1 points Which of the following protein molecules provides the binding site for the myosin heads? Tropomyosin Actin Troponin Myofilament • Question 18 1 out of 1 points Which of the following is found in the dermis layer of skin? Subcutaneous fat Elastic fibers Granulosum layer Melanin • Question 19 1 out of 1 points Which statement is true of articulations (joints)? Cartilaginous joints are freely moveable Cranial bone sutures are classified as fibrous joints Bursas assist cartilaginous joints function Tendons are essential to the stabilization of suture joints • Question 20 1 out of 1 points The process of detaching the thick filament from the thin filament during muscle relaxation requires ATP. True False • Question 21 0 out of 1 points Which choice is true regarding myoglobin? Found in fast oxidative muscle fibers It is a molecule that can store oxygen molecules within the muscle cell It causes muscle cells to have a white color/appearance It is a molecule that can store glycogen to be used to make ATP • Question 22 1 out of 1 points Which of the following statements is true of a synovial joint? The synovial joint is stabilized by bursae The joint cavity space tends to stay the same through life even with trauma The bursae produce synovial fluid Synovial fluid lubricates the joint and prevents excessive wear on the joints • Question 23 1 out of 1 points This type of tissue is exposed to external environments, lines hollow organs such as the stomach and bladder, and plays an integral role in the epidermis. Nervous tissue Muscular tissue Connective tissue Epithelial tissue • Question 24 1 out of 1 points A strain occurs when there is damage to: Ligaments Tendons Synovial sheaths Articular cartilage • Question 25 1 out of 1 points Which statement is true of articulations (joints)? The shoulder joint is mainly stabilized by the trapezius and pectoral muscles The glenohumeral joint contains mensci to help minimize wear and tear on the joint surfaces Damage done to joints by osteoarthritis is easily reversible The ends of bones within a synovial joint are all covered with articular cartilage • Question 26 1 out of 1 points DNA is stored in which cellular organelle? Gogli apparatus Smooth endoplasmic reticulum Mitochondria Nucleus • Question 27 1 out of 1 points Which statement is true of the epiphyseal plates of bones? Found in bones of adults and children Allow for longitudinal bone growth to occur Produce the blood cells for the skeletal system Largely composed of collagen and elastic fibers • Question 28 1 out of 1 points Hematopoiesis is a primary function of the muscular system. True False • Question 29 1 out of 1 points Which choice best describes the function of the Haversian (central) canals within bone? To provide nutrients to the bone cells To provide protection to the bone cells To reduce weight of bone tissue To produce new elastic fibers within bone • Question 30 1 out of 1 points Increasing intensity of contractions during labor is an example of negative feedback. True False • Question 31 1 out of 1 points The arrangement of the fascicles in a muscle influences the direction a muscle will contract. True False • Question 32 1 out of 1 points Enzymes are used to speed up chemical reactions within the body. True False • Question 33 1 out of 1 points Skin cancer originates in the dermis of the skin. True False • Question 34 1 out of 1 points A ligament connects a muscle to a bone, while a tendon stabilizes a joint by connecting or joining one bone to another. True False • Question 35 1 out of 1 points Which of the following is a function of the integument system? Excretion of fat cells Assist in the production of vitamin C Assist in regulation of the body temperature Assist in the protection of calcium loss within the body • Question 36 1 out of 1 points Which of the choices is true regarding muscle contraction? A nerve impulse (action potential) is required to have sodium and potassium released into the synaptic cleft T-tubules help transmit the action potential deep into muscle cell to stimulate the release of calcium from the endoplasmic reticulum ATP is needed for the power stroke to occur The myosin head binds to the troponin and tropomyosin proteins of the thin filament • Question 37 1 out of 1 points Which bone cell is responsible for breaking down bone tissue? Osteocyte Osteoblast Osteogenic Osteoclast • Question 38 1 out of 1 points The organic components of the extracellular matrix space include collagen fibers. True False • Question 39 1 out of 1 points Which statement is true regarding synovial joints? Every synovial joint cavity contains fibrocartilage The joint cavity is completely surrounded by an articular capsule Elastic cartilage covers the epiphyseal ends of articulating bones Every synovial joint has a meniscus • Question 40 0 out of 1 points Which statement is true regarding the epiphyseal plates? They are completely ossified by 5-10 years of age They can be utilized to determine whether a bone is still growing longitudinally Commonly found in the center of the metaphysis of long bones It is a result of bone being converted into cartilage so the bone can grow • Question 41 1 out of 1 points This type of gland secretes an oily secretion that helps lubricate and keeps the skin and hair from becoming dry and brittle? Eccrine gland Ceruminous gland Sebaceous gland Apocrine gland • Question 42 1 out of 1 points Autosomal recessive traits and disorders are typically expressed in each generation. True False • Question 43 1 out of 1 points Which statement is true regarding articulations? The cartilage found between two vertebrae is elastic cartilage The wrist joint is classified as a synovial joint The hip joint contains a meniscus which helps stabilizes the joint The knee joint has six main ligaments that stabilize it • Question 44 1 out of 1 points Which statement is true regarding the hip? It is less stable than the glenohumeral (shoulder) joint It has a ligament that connects the femoral head into the acetabulum It is one of the most commonly dislocated joints in the body It is considered a syndesmosis joint • Question 45 1 out of 1 points The last step in bone fracture repair is the formation of the fibrocartilaginous callus. True False • Question 46 1 out of 1 points Which of the following muscles is considered a rotator cuff muscle? Subscapularis Teres major Pectoralis major Levator scapula • Question 47 1 out of 1 points Which statement is true regarding osteoarthritis? It commonly occurs in younger individuals Degenerative changes occur to the articular cartilage The damage is usually reversible It is an autoimmune disease • Question 48 1 out of 1 points Which statement best describes epimysium? It is a protective connective tissue covering around a entire muscle It is a pathway for blood vessels to reach the muscle cells It is a connective tissue covering a group muscle cells (fibers) It is a connective tissue covering around an individual muscle cell (fiber) • Question 49 1 out of 1 points Which type of skin cancer has the highest fatality rate? Basal cell carcinoma Squamous cell carcinoma Keratinoma Melanoma • Question 50 1 out of 1 points The majority of joints within the body are classified as: Cartilaginous Fibrous Synovial Synarthroses

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