Answer:
True
Explanation:
Based on historical reply here
Answer:
b. osteoclasts
Explanation:
Osteoclasts are large multi nucleated cells. They are found in pits of the bone surface. They have many vesicles and vacuoles leading to a "foamy" cytoplasm. They also have lysosomes filled with acid phosphatase.
Osteoclasts' primary function is to breakdown bone tissue that is required for repair, maintenance and remodeling of bones. They digest the bone by secreting collagenase and acid in a process called as bone resorption. Bone resportion as a pathological response is called as osteolysis. It can be caused by inflammation, tumor and cyst.
Answer:
a. True
Explanation:
A portal system begins with a set of capillaries and ends with a set of capillaries. Blood comes from one set of capillaries to a a larger blood vessel which drains into another set of capillaries and it is then sent to the heart.
A classic example of portal system is Hepatic portal system. Major function of this system is to deliver nutrients from digested food to liver so that it can be metabolized. Small intestine absorbs nutrients from the digested food. These nutrients enter the blood in first capillary bed present in intestine. The deoxygenated blood flows through Hepatic portal vein to liver. Inside liver the blood passes through second capillary bed and nutrients are released in hepatocytes. These capillaries join the hepatic vein and the blood is sent to heart via inferior vena cava.
Answer:
Because the food you handle is going to be eaten by people and you don't want to get them sick
The target heart rate zone is the range of exercise intensity that allows you to stress your cardiorespiratory system for optimal benefit without overloading the system.
The target heart rate of an individual refers to the heartbeat range during exercise and is measured as a percentage. The resting heart rate is calculated by checking the pulse beat for one minute. It normally ranges between 60-100 beats/minute. The target heart rate is 220 subtracted by the age of an individual. For example, the target heart rate for a 27-year-old would be 220-27= 193 beats/minute. Therefore, at a 50% exertion level, the target heart rate must be 50% of the maximum value, that is, 97 beats/minute.
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