BIO 100 Unit 2 Pre-Test _ 2020 – Troy University | BIO 100 Unit 2 Pre-Test _ 2020

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BIO 100 Unit 2 Pre-Test _ 2020 – Troy University Which of the following factors contributes to a condition like osteoporosis? Skeletal Health and Disorders • Not enough exercise • Too muc... h calcium intake • Not enough sleep • Too much exercise __________ is the sustained contraction of muscle fibers caused by exposure to microbes. Muscle System Disorders • Muscular dystrophy • Tetanus • Atrophy • Muscle spasmWhich of the following body parts are contained in the pelvic girdle? Skeleton • The left arm • The head • The left leg • The rib cage Which type of muscle is most common in the human body? Muscular System • Cardiac • It depends on the person • Smooth • Skeletal Weight lifting would have the largest effect on your __________ muscle fibers. This type of activity produces more __________, which makes muscles larger and stronger. Muscle Building and Steroids • fast or white; myofibrils •slow or red; myofibrils • fast or white; myoglobin • slow or red; myoglobin Which of the following is characteristic of long bone growth? Bone Structure and Growth • Occurs in the middle, but not in the ends • Occurs in the ends at first, then in the middle • Occurs in the middle at first, then at both ends • Occurs on the ends, but not in the middle Anabolic steroids are testosterone supplements that are used to __________. Muscle Building and Steroids • build muscle mass quickly • normalize menstrual cycles • reduce hair loss •improve the functioning of the liver The bicep and tricep are an example of which kind of muscle? Skeletal Muscles • Both skeletal and smooth • Skeletal • Cardiac • Smooth A __________ fracture, in which the bone shatters and causes soft tissue damage to the surrounding area, is the most serious type of bone fracture. Skeletal Health and Disorders • compound • complete • simple • None of the above Which of the following statements is true? Homeostasis and Bone Remodeling •When there is too much calcium in the blood, the brain releases a chemical called parathyroid hormone, which causes osteoblasts to build new bone tissue. • When there is too much calcium in the blood, the brain releases a chemical called calcitonin, which causes osteoblasts to build new bone tissue. • When there is too little calcium in the blood, the brain releases a chemical called calcitonin, which causes osteoblasts to break down existing bone tissue. • When there is too little calcium in the blood, the brain releases a chemical called calcitonin, which causes osteoclasts to break down existing bone tissue. Joseph is planning on participating in a triathlon. Which of the following is true based on this scenario? Types of Skeletal Muscle and Muscle Contraction Overview • He will be using mostly red skeletal muscles so that his long duration of activity can be sustained. • He will be using mostly white skeletal muscles because they contain the most mitochondria and produce the most energy. • He will be using an equal combination of red and white skeletal muscle. • He will be using mostly white skeletal muscle since they contract quickly and will allow him to move fast.Some muscle groups work __________, meaning the muscles work together to increase force or add stability to another muscle. Types of Skeletal Muscle and Muscle Contraction Overview • anaerobically • antagonistically • synergistically • aerobically What is the role of sarcoplasmic reticulum in the muscle cells? Muscle Contractions: Micro Level • It helps store and pump calcium ions. • It pulls the muscle fibers close to each other. • It causes repeated muscle twitch. • It produces ATP molecules for muscle function. Which of these is true about the sarcomere? Nervous System and Contractions •They contain axons and dendrites. • They contain neurotransmitters. • They contain actin and myosin. • They contain motor neurons. Which kind of joint allows for only slight movement? Joints • Sutured • Fibrous • Cartilaginous • Synovial [Show More]

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