Answer: Lymph node
Explanation:
The lymphatic system of the body works by filtering the blood and remove the harmful pathogen that is present in it.
There are several organs in the lymphatic system that works together at different sites in the body and helps body prevent and cure from infection.
Lymph nodes function to remove pathogen and debris from lymph and it is also referred as filters of lymph. The macrophages and dentritic cells kill the harmful pathogen in the blood.
Hence, the correct answer is option A
Heart Rate (HR) is the BEST measure of exercise intensity in a newly tested and exercising individual.
<h3>How is HR measured in exercise?</h3>
Steps to check your heart rate during exercise:
- 15 seconds are needed to take your pulse. Put index and third fingers on y neck, to the side of the windpipe, to check the pulse over the carotid artery.
- For a beats per minute calculation, multiply this number by 4.
Monitoring your heart rate while exercising can help you shed pounds or become more effective. This is due to the fact that heart rate is a reliable gauge of exercise intensity: Your heart rate increases as the intensity increases.
Learn more about heart rate here:
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Answer: D) precapillary sphincters relax.
Explanation:
Blood flow to a tissue will decrease if precapillary sphincters relax as, capillaries provides glucose and oxygen to the cells and allows blood to flow through it when the muscle ring known as the precapillary Sphincters get relaxed. The blood flow is stopped when the precapillary sphincters constrict flow of blood. As, certain chemical signals causes feeder arterioles to dilate and bring more blood into local areas then, it causes precapillary sphincters to relax.
Answer:
Cardiac tamponade condition reduces the ability of heart contraction.
Explanation:
Cardiac tampondae is a medical condition in which the pericardium sac fills with blood and causes various health related problems in the individuals.
Individuals with cardiac tampondae suffers from the low blood pressure, anxiety, shortness of breath and pain in chest, neck and shoulder. The serious condition of cardiac tampondae increase the pressure on heart and reduces the ability of heart to contract.
