Class 1 levers - Study guides, Class notes & Summaries

BIOS 252 Final Exam Practice Test Questions And Answers Well Illustrated. Which of the following is a recognized function of skeletal muscle? 1) A) guard body entrances and exits B) maintain posture C) maintain body temperature D) produce movement E) all of the above - correct answer. E Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the A) myofibrils. B) sarcolemma. C) endomysium. D) sarcomere. E) perimysium...

1) Which of the following is a recognized function of skeletal muscle? 1) A) guard body entrances and exits B) maintain posture C) maintain body temperature D) produce movement E) all of the above 2) Nerves and blood vessels that service the muscle fibers are located in the connective tissues of the 2) A) myofibrils. B) sarcolemma. C) endomysium. D) sarcomere. E) perimysium. 3) Which of the following best describes the term sarcoplasmic reticulum? 3) A) largely made of myosin molec...

1st Class Lever - Fulcrum located between R and F R & F in the same direction F + R=Fulcrum MA depends on the location of the fulcrum MA=1 *Atlanto-occipital joint 2nd Class Lever - F<R Advantageous in terms of force (MA>1) Most levers used in daily life *Ankle in tiptoeing 3rd Class Lever - F>R Disadvantage in terms of force (MA<1) Majority of the human body joints (95%) Advantage in displacement and speed and the main source of human mobility *Elbow in lifting 6 join...

Which of the following substances regulates muscle actions? a. Potassium b. Calcium c. Troponin d. Tropomyosin b. Calcium Which of the following substances acts at the neuromuscular junction to excite the muscle fibers of a motor unit? a. Acetylcholine (ACH) b. ATP c. Creatine Phosphate d. Serotonin a. Acetylcholine (ACH) When throwing a baseball, an athlete's arm is rapidly stretched just before throwing the ball. Which of the following structures detects and respon...

Classes of Levers - Class 1, Class 2, Class 3 Class 1 Levers - Fulcrum is in the middle, with the effort (input) force on one side of the fulcrum and resistance (output) on the other side. Mechanical Advantage greater or less than 1 Ex: Seesaw, Crowbar, Pair of Scissors. Class 2 Levers - Resistance is in the middle, the effort is applied on one side of the resistance and the fulcrum on the other side. Mechanical Advantage always greater than 1 Ex: Wheelbarrow, nutcracker, bottle opener, ...

How do inclined planes work? An inclined plane allows you to exert your input force over a longer distance. As a result, the input force needed is less than the output force. Simple Machine Is the most basic device for making work easier. What are 3 closely related simple machines from the inclined plane family? Inclined plane Wedge Screw What is a ramp an example of? A ramp is an example of a simple machine called an inclined plane. Inclined Plane Is a flat, s...

A belt and pulley system is characterized by - Answer-two or more pulleys in common to a belt. What does a belt and pulley system allow for? - Answer-mechanical power, torque, and speed to be transmitted across axles How is mechanical advantage realized? - Answer-if the pulleys are different diameters what is a pulley? - Answer-a wheel on an axle or shaft that is designed to support movement and change of direction of a cable or belt along its circumference Why are pulleys used? - Answer-l...

Classes of Levers - ANSWER Class 1, Class 2, Class 3 Class 1 Levers - ANSWER Fulcrum is in the middle, with the effort (input) force on one side of the fulcrum and resistance (output) on the other side. Mechanical Advantage greater or less than 1 Ex: Seesaw, Crowbar, Pair of Scissors. Class 2 Levers - ANSWER Resistance is in the middle, the effort is applied on one side of the resistance and the fulcrum on the other side. Mechanical Advantage always greater than 1 Ex: Wheelbarrow, nu...

Classes of Levers - ANSWER-Class 1, Class 2, Class 3 Class 1 Levers - ANSWER-Fulcrum is in the middle, with the effort (input) force on one side of the fulcrum and resistance (output) on the other side. Mechanical Advantage greater or less than 1 Ex: Seesaw, Crowbar, Pair of Scissors. Class 2 Levers - ANSWER-Resistance is in the middle, the effort is applied on one side of the resistance and the fulcrum on the other side. Mechanical Advantage always greater than 1 Ex: Wheelbarrow, nu...

kinematics - Answer-description of motion including planes of motion, type, and the direction of the motion kinetics - Answer-study of motion and it's causes like gravity and muscles center of gravity - Answer-the point around which an object's weight is evenly distributed. It can change when a person raises their arms or jumps line of gravity - Answer-imaginary vertical line that passes through the center of gravity. If it is located in the person's base of support, then the object is ...