FREE AFAA MCQ Questions and Answers
What kind of connective tissue holds bones together?
Ligaments are composed of dense, fibrous connective tissue that is rich in collagen fibers. They have a slightly elastic quality, allowing for limited flexibility and controlled movement within the joint while providing stability. Ligaments are found throughout the body in various joints, such as the knee, ankle, shoulder, and wrist.
What exercise makes use of the aerobic energy system?
Indoor cycling is an activity that primarily utilizes the aerobic energy system. The aerobic energy system, also known as the oxidative system, relies on oxygen to produce energy for sustained exercise.
During indoor cycling, participants engage in continuous rhythmic pedaling movements for an extended duration. This type of exercise predominantly uses the aerobic energy system to meet the increased demand for energy. The aerobic system relies on the breakdown of carbohydrates and fats in the presence of oxygen to generate adenosine triphosphate (ATP), which is the primary source of energy for muscle contractions.
When oxygen intake reaches a sufficient level to meet the body's oxygen requirements, that condition is defined as _____.
Reaching a steady state during aerobic exercise indicates that the body is efficiently delivering oxygen to the working muscles, enabling them to sustain the activity without accumulating an oxygen deficit. It signifies a balance between oxygen demand and oxygen consumption, allowing individuals to maintain a consistent workload for an extended period
When calculating the training heart rate range using the Karvonen formula, the ____ is taken into account (THRR).
The Karvonen formula is a method used to determine the training heart rate range (THRR) for cardiovascular exercise, taking into account an individual's resting heart rate (RHR). It provides a more personalized and accurate estimation of target heart rate zones during exercise.
An individual's estimated maximum heart rate can be ascertained by:
One common method used to estimate an individual's maximal heart rate (MHR) is by subtracting their age from the number 220. This formula provides a general estimation of the maximum number of beats per minute the heart can reach during exercise.
Which kind of muscle action, also known as a muscle contraction, does not require the muscle to alter length when applied to a fixed resistance?
Isometric muscle contraction is a type of muscle action that does not involve a change in the length of the muscle when exerting force against a fixed resistance. In isometric contractions, the muscle generates tension without any visible movement or joint angle change.
During an isometric contraction, the muscle contracts and exerts force, but the overall length of the muscle remains constant. The force generated by the muscle is equal to or greater than the opposing force or resistance applied, resulting in muscle activation and tension development. This type of contraction is often referred to as "static" or "holding" contraction.
The ___ system is what permits blood to circulate through the heart, lungs, and body.
The system that allows blood to flow through the heart, lungs, and body is called the circulatory system, also known as the cardiovascular system.
The circulatory system is responsible for the transportation of oxygen, nutrients, hormones, and other essential substances throughout the body. It consists of the heart, blood vessels (arteries, veins, and capillaries), and blood.