Concept explainers
List the three basic forms of work and give a physiological example of each.
To determine: The three basic forms of work with their examples.
Introduction: Biomolecules provide energy to animals and animals used this energy to perform their daily activities. The capacity to complete a task is known as energy.
Explanation of Solution
In a biological system, work can be in three forms, which are as follows:
- Chemical work:
The cleaving and forming the bonds in a chemical reaction is a form of work. This form of work is known as chemical work. Chemical work enables the growth of cells, maintenance of the environment inside the body, and information storage. For example, in protein chemical bonds are formed, which is an example of chemical work.
- Transport work:
In the body of humans, many concentration gradients are made by transport work. Transport work enables the movement of the ions and molecules across the membrane. For example, calcium ion is imported from the cytosol to cell organelles. In this work, endoplasmic reticulum utilizes energy, and the movement of ions helps in the contraction of muscles.
- Mechanical work:
Animals use mechanical work for their movement. For examples, the movement of organelles in the cell, change in the shape of the cell, and the movement of filaments and cilia.
Therefore, the three forms of work are mechanical work, chemical work, and transport work.
Want to see more full solutions like this?
Chapter 4 Solutions
Human Physiology: An Integrated Approach (8th Edition)
- Classify heat capacity and specific heat capacity as an extensive or intensive property. heat capacity |(select) specific heat capacity |(select) 00arrow_forwardstate the Primary energy system and the Secondary energy systems. Think of which is the primary and secondary used energy system to produce ATP for each of the four segments (a through d) for a person participating in a maximum treadmill test. Each scenario is worth two points. Energy Systems choices: ATP-Pc Anaerobic Glycolysis Aerobic Glycolysisa) While the client is sitting listening to a personal trainerb) The first few seconds of the treadmill testc) During a stage that the client reaches steady-state performanced) At the end of the test as the client reaches maximum outputarrow_forwardWhat is the estimated relative VO2 of someone walking on a flat treadmill at 2 mph and a 1% grade. How many metabolic equivalents (METs) is this equal to? Using the METs, identify whether the intensity of this activity would be classified as very light, light, moderate, or vigorous then explain why you believe this to be the case.arrow_forward
- What is the predominant energy system utilized during submaximal aerobic exercise? How does the body meet energy needs when transitioning from rest to a given submaximal aerobic exercise intensity? Explain how this information may apply to the performance of the physical activity(conditioning exercise: video exercise workouts, TV conditioning programs(eg., cardio- resistance), vigorous effort ) What are factors that play a role in determining the O2 deficit? What factors can we control in lab on any given day? Give the historical and current theories explaining the slow component of EPOC.arrow_forwardDiscuss briefly (in less than 100 words) the practice of carbohydrate loading for endurance in aerobic exercise. What is the role of glycogen metabolism (glycogenesis and glycogenolysis) and glycolysis in carbohydrate loading? Why is this practice more productive than usual without carbohydrate loading?arrow_forwardWhat is rapid cycling ?arrow_forward
- During the initial phase of exercise, muscles can become hypoxic which leads to the buildup of lactate. a) Fully explain how oxygen shortage can lead to the accumulation of lactate in the muscles. b) Describe how lactate (often seen as a waste product) can produce glucose via gluconeogenesis.arrow_forwardWhat are the psychological effects of exercise on motivation and adherence to physical activity?arrow_forwardWhat is a better or more efficient fuel; Carbohydrates or Fats? What is the definition of RER or R values. And what is the R values at easy exercise and what is the R at high intensity exercise.arrow_forward
- Explain the activity at optimum temperature and the meaning of optimum temperaturearrow_forwardAs part of a weight loss program, Colton has been asked to exercise more. Along with a proper diet, he has been asked to burn an extra 250 kcal/day through exercise. Given that the exercise intensity that Colton should work at in order to meet his energy expenditure goal if he only wants to excerise for 40 min/day is going to be 1.25. Given that if Colton's weight is 96 kg, his relative VO2 is 13.02. Colton's "bad knees" prevent him from running on a treadmill, so you decide to prescribe cycling exercise for him. What should his work rate (in Watts) on the cycle erogmeter be, in order to exercise at the intensity 13.02.arrow_forwardBriefly describe weight/body mass gain and weight/body mass loss in terms of energy balance.arrow_forward
- Lifetime Physical Fitness & WellnessHealth & NutritionISBN:9781337677509Author:HOEGERPublisher:Cengage
- Case Studies In Health Information ManagementBiologyISBN:9781337676908Author:SCHNERINGPublisher:Cengage