Which statement provides the best explanation of the need for self-tolerance screening of lymphocytes?
Lymphocytes which would attack the body's own tissues are never generated.
The process which generates the vast array of diverse antigen receptors is a random process that could produce receptors which will bind to the body's own tissues.
The process which generates the vast array of diverse antigen receptors is a highly-controlled process, so the generation of receptors which can bind to the body's own tissues is a rare occurrence due to a genetic mutation.
Self-tolerance involves "self" lymphocytes which bind to and form a protective layer over all body tissues.
It is necessary to have some lymphocytes with receptors that are self-tolerant to respond to intracellular infections by viruses.
The process which generates the vast array of diverse antigen receptors is a random process that could produce receptors which will bind to the body's own tissues.
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Which of the following terms is NOT one of the families of hormones secreted by the adrenal cortex?
A) mineralocorticoids B) epinephrine C) glucocorticoids D) steroid sex hormones
Which of the following statements correctly describes isometric training?
A. It is the most popular mode of training. B. It has two action phases: concentric and eccentric. C. It involves movement at the joints. D. It involves pushing or pulling against immovable objects. E. It is no longer recommended as a mode of training because of the high risk of injury.
Flexibility declines as we age due to injury, disuse, excessive body fat, and
A. muscle weakness. B. increased muscular strength. C. muscle imbalances. D. exercise. E. overstretching.
A grip dynamometer is used to assess muscle strength
Indicate whether the statement is true or false