Explain why cardiovascular responses are greater during isometric exercise than during dynamic exercise
During isometric exercise, increases in intramuscular pressure restrict blood flow to the exercising muscle. This restriction to flow reduces the delivery of oxygen to the exercising muscle. Subsequently, more anaerobic energy production is required to maintain the heavy work of contraction, leading to an accumulation of metabolites. This process occurs within the muscle and is proportional to the strength of the isometric contraction. The accumulation of metabolites activates chemical sensors within the muscle that tell the cardiovascular control center, by afferent neural networks connected to the cardiovascular system in the brain, that not enough oxygen is being delivered to the muscle. This message triggers a central stimulation of the cardiovascular system to try to increase the blood flow to the exercising muscle.
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Answer the following statements true (T) or false (F)
1. The fluid inside a lymphatic vessel is called lymph. 2. Lymph nodes and lymph glands are not the same thing. 3. The immune system will destroy the body's own cells if they have become diseased. 4. The lingual tonsils are also called the adenoids. 5. The macrophages in the spleen are phagocytic.
Which diagnostic test is most preferred to detect liver cancer?
1. CA-125 blood test 2. Papanicolaou test 3. Barium enema test 4. Alpha-fetoprotein test
A surgical procedure in which the foreskin (prepuce) of the penis is removed is known as a(n) __________________________
Fill in the blank(s) with correct word
The difference in health between populations is known as
A) crude rate. B) Years of Potential Life Lost (YPLL). C) Health-Related Quality of Life (HRQOL). D) health disparity.