Fitness Trivia Questions from Conference Presentations How many cells in an adult human? Over 50 trillion What are the only cells without a nucleus? Red blood cells What are the longest cells in the body? Nerve Cells What is the longest, strongest bone in the body? Femur Where is 99% of the body’s calcium? Bones and teeth What is the hardest material in the body? Enamel What is the body’s largest joint? Knee What is the body’s largest muscle? Gluteus maximus How many new white blood cells are made every day? 10 Billion What does trabeculae mean? Little Beams How many bones in the skull? 22 Does the human neck have the same number of vertebrae as a giraffe? Yes Approximately how much of your body weight is muscle? 40% How fast can nerve impulses travel? Up to 250 mph Approximately how many scalp hairs fall out daily? 80 T or F: The outer surface of each hair is coated with dead cells to protect the hair? True What is the longest nerve in the body? Sciatic Nerves that interweave together are referred to as: Plexus What does the left side of the brain control? Logic and speech What does the right side of the brain control? Creative thinking How many brain cells can one brain cell communicate with? 25,000 What does vagus mean (as in vagus nerve)? The wanderer How long is the spinal cord in most adults? 17 inches How much skin does the body shed in an average lifetime? 40 lbs How many taste buds are there on your tongue? Over 10,000 How many odors can the sense of smell detect? 2,000 – 4,000 How many different tones can you detect? 1,500 How many times do you blink in a minute? 15 times How many miles of blood vessels does the human body have? 93,000 How many gallons of blood does the heart pump a day? 3,600 gallons What is the largest artery in the body? Aorta Do the atria and ventricles of the heart hold the same volume of blood? Yes Another name for a red blood cell is? Erythrocyte Another name for a white blood cell is? Leucocyte What are the four main blood groups? A B AB O What does a macrophage mean? Big Eater What is the super human hormone? Epinephrine What gland is often referred to as the Master Gland? Pituitary What is a hiccup? The diaphragm contracting rapidly How much air can adult lungs hold? About 3 liters What are the 12 pairs of nerves attached to the brain? Cranial nerves What is a protein that speeds up a chemical reaction? Enzyme What is the soft inner part of long bones, where blood cells are made called? Marrow Where do oxidative energy producing chemical reactions take place? Mitochondrion T or F: The average foot walks more than a thousand miles a year. True What percent of your body is water? 60% How long does it take for blood to circulate through the body? 23 seconds What is the longest muscle in the body? Sartorius How many years does it take the cell structure of the skeleton to completely rejuvenate itself? 10 years What is the only joint of the body with 360 degrees of rotation? Shoulder What is the single most preventable cause of death? Cigarette smoking Is it better to go to bed at the same time nightly or wake up at the same time each morning? Most experts recommend getting up at the same time each morning. What is the single most important thing you can do to prevent the transmission of infectious organisms? Wash your hands What are the muscle cells of the heart referred to as? Myocardial cells What are the only cells in the body that can contract on their own, without stimulation? Autoryhythmic cells of the heart What is the most abundant tissue in the human body? Skeletal muscle How long are the longest muscle fibers? Approxinately 30cm What part, the light chain or heavy chain, determines the functional characteristic of muscle? Heavy chain What are the 3 different types of skeletal muscle fiber? Type I, IIa, IIx. Approximately how fast to Type II fibers contract compared to Type I? 10x faster What regulates the speed of Type I and Type II fibers? The rate at which they split ATP Which muscle protein is remarkably similar between species to species? Myosin How much does resistance training enlarge Type II fibers? Twice as much as Type I fibers Whatis he only food that can be metabolized anaerobically? Carbohydrate Where does glycolysis take place? Cytoplasm of cell Does the body store fat wet or dry? Dry