ANATOMY+PHYSIOLOGY
4th Edition
ISBN: 9781260265217
Author: McKinley
Publisher: RENT MCG
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 9.6, Problem 15WDYL
Summary Introduction
To analyze:
The difference between the effort arm and the resistance arm in a lever.
Introduction:
A lever is generally an elongated, rigid part that usually rotates along a fixed point which is referred to as the fulcrum. Levers can change the speed and distance of this movement, the direction of an applied force, and the force strength.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
If your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from the elbow to the palm of your hand is 18 inches, and you lift a 20 pound weight, how much pull must your muscle exert to achieve elbow flexion? If your biceps brachii muscle attaches to your forearm 2 inches below your elbow, the distance from the elbow to the palm of your hand is 18 inches, and you lift a 20 pound weight, how much pull must your muscle exert to achieve elbow flexion?
hhh
What benefit is provided by a lever that operates at a mechanical advantage?
Where are the effort, fulcrum, and resistance in the act of dorsiflexion? What class of lever does the foot act as during dorsiflexion? Would you expect it to have a mechanical advantage greater or less than 1.0? Why?
Chapter 9 Solutions
ANATOMY+PHYSIOLOGY
Ch. 9.1 - What is the relationship between mobility and...Ch. 9.1 - Are all fibrous joints also synarthroses? Explain...Ch. 9.2 - Prob. 3WDYLCh. 9.2 - Prob. 4WDYLCh. 9.2 - Prob. 5WDYLCh. 9.3 - Prob. 6WDYLCh. 9.3 - Prob. 7WDYLCh. 9.4 - What are the basic characteristics of all types of...Ch. 9.4 - Prob. 9WDYLCh. 9.4 - Prob. 10WDYL
Ch. 9.5 - Prob. 11WDYLCh. 9.5 - Prob. 12WDYLCh. 9.5 - Prob. 13WDYLCh. 9.5 - Prob. 14WDYLCh. 9.6 - Prob. 15WDYLCh. 9.6 - Prob. 16WDYLCh. 9.7 - Prob. 17WDYLCh. 9.7 - Prob. 18WDYLCh. 9.7 - Prob. 19WDYLCh. 9.7 - How do the glenohumeral and hip joints compare...Ch. 9.7 - What are the functions of each of the...Ch. 9.7 - Prob. 22WDYLCh. 9.8 - Prob. 23WDYLCh. 9 - _____ 1. The greatest range of mobility of any...Ch. 9 - _____ 2. A movement of the foot that turns the...Ch. 9 - _____ 3. A _______ is formed when two bones...Ch. 9 - Prob. 4DYKBCh. 9 - Prob. 5DYKBCh. 9 - Prob. 6DYKBCh. 9 - Prob. 7DYKBCh. 9 - Prob. 8DYKBCh. 9 - Prob. 9DYKBCh. 9 - Prob. 10DYKBCh. 9 - Prob. 11DYKBCh. 9 - Prob. 12DYKBCh. 9 - Prob. 13DYKBCh. 9 - How do a hinge joint and a pivot joint compare...Ch. 9 - Prob. 15DYKBCh. 9 - Prob. 16DYKBCh. 9 - Most ankle sprains are overinversion injuries....Ch. 9 - What are the main supporting ligaments of the...Ch. 9 - Prob. 19DYKBCh. 9 - What are the similarities and differences between...Ch. 9 - Prob. 1CALCh. 9 - Prob. 2CALCh. 9 - Prob. 3CALCh. 9 - Prob. 4CALCh. 9 - Prob. 5CALCh. 9 - During soccer practice, Erin tripped over the...Ch. 9 - Prob. 2CSLCh. 9 - Jackie visits her physician because she is...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- How does speed of muscle action affect the following relationships; force-velocity and force-power?arrow_forwardA) Describe the difference between strength and power during a squat. Provide a quantitative example that illustrates the difference. B) During a squat, the weight you have on your shoulders has a certain amount of gravitational potential energy. As you squat down and come to a stop at the bottom of the squat, some of that energy is lost. Where does it go?arrow_forwardName the three types of lever systems and indicate the arrangement of effort, fulcrum, and load in each. Also note the advantages of each type of lever system.arrow_forward
- What is the difference between striated myofilament contraction and smooth myofilament contraction?arrow_forwardIsometric exercise is best described as applying a force O a) with movement through a full and complete range of motion O b) while a muscle is lengthening and returning to a resting position c) without any change in length of the muscle O d) at a constant speedarrow_forwardWe move a lot and do not even realize how intricate these movements may be from gross motor to fine motor manipulations. Briefly explain the steps involved in a single muscle contraction beginning at the neuromuscular junction through one complete contraction and relaxation for the sliding filament theory. Don’t forget to include all the major proteins (actin, myosin, troponin and tropomyosin) involved as well as calcium and ATP.arrow_forward
- How much force must be produced by the biceps brachii, attaching at 90? to the radius at 3 cm from the center of rotation at the elbow joint, to support a weight of 200 N held in the hand at a distance of 30 cm from the elbow joint? (Neglect the weight of the forearm and hand, and neglect any action of other muscles)arrow_forwardWhat is the difference between a myofilament and a myofibril?arrow_forwardIf the muscle fiber is stretched to 150% of muscle length and thentechnically stimulated, what would be the total force measured?arrow_forward
- Differentiate between the arrangement of elements (load, fulcrum, and effort) in first-, second-, and third-class levers.arrow_forwardIf a person has a vertical force of 10.25N with a nylon strap of a 2.5cm of width and length of 10cm in the trapezius muscle, how much time does the person need to feel pain in the muscle? How much time is needed to injure or damage the muscle? Must show every mathematical process.arrow_forwardWhat is an example of multiple lever types in the body during the same movement?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
Human Physiology: From Cells to Systems (MindTap ...
Biology
ISBN:9781285866932
Author:Lauralee Sherwood
Publisher:Cengage Learning
GCSE PE - ANTAGONISTIC MUSCLE ACTION - Anatomy and Physiology (Skeletal and Muscular System - 1.5); Author: igpe_complete;https://www.youtube.com/watch?v=6hm_9jQRoO4;License: Standard Youtube License