The technique of muscle stretching known as proprioceptive neuromuscular facilitation (PNF) is based on responses elicited from which of the following?
A. Golgi tendon organs
B. muscle spindles
C. both A and B
D. neither A nor B
A. Golgi tendon organs
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Answer the following statements true (T) or false (F)
1. There is good evidence that regular, lifelong, high-intensity exercise can reduce the loss of motor units typically associated with aging. 2. Delayed onset muscle soreness is associated more with isometric training than with concentric or eccentric training. 3. Hamstring strains are slow to heal and have a high incidence of reoccurrence. 4. Although muscle fibers are typically categorized by three types, there is actually a continuum of fiber characteristics. 5. Electrochemical delay in children is longer than in adults.
Which factor would reduce total peripheral resistance?
a. adrenal medulla hormones b. angiotensin II c. red blood cell concentration d. anaphylactic shock e. cardiovascular center activity
The primary goal of the immune response is
A. stimulation of mitotic activity in order to replace cells damaged by infection. B. maintenance of the proper ionic balance between lymph and blood. C. destruction or inactivation of pathogens and foreign material. D. removal of antibodies from lymph and lymphatic organs. E. reduction of the number of circulating memory lymphocytes.
The fossa ovalis is a remnant of the ________ of the fetus
A) umbilical vein B) umbilical artery C) foramen ovale D) ductus venosus E) ductus arteriosus