Answer:
The major blood vessels connected to your heart are the aorta, the superior vena cava, the inferior vena cava, the pulmonary artery (which takes oxygen-poor blood from the heart to the lungs where it is oxygenated), the pulmonary veins (which bring oxygen-rich blood from the lungs to the heart), and the coronary.
A heart attack occurs when one or more of your coronary arteries become blocked. Over time, a coronary artery can narrow from the buildup of various substances, including cholesterol (atherosclerosis). This condition, known as coronary artery disease, causes most heart attacks.
They are personal, and involve new habits or personal goals
One thing that most people complain about while working out is light-headedness, this often occurs in the middle of a workout if one hasn't eaten or hydrated enough pre-workout. Dehydration takes place when the body loses more fluid than it gets, and the most common cause of water loss from the body is excessive sweating. Also not allowing yourself enough recovery time in between workouts can result to feeling lightheaded, this means you simply get short of breath, concentration level might drop significantly, and you might have difficulties standing on your own. To fix the aforementioned, stop whatever vigorous activity you're doing, and drink enough water to compensate for the lost water, then lie down in a position where the head is level with the heart, this allows more blood flow to the brain, causing the feeling of faintness to go away. And the water helps to hydrate the body again.
Answer: True
Explanation:
Telomerase is an enzyme that is produced in the body. It prevents the shortening of the length of telomeres.
Telomerase is not usually activated in the cells of the body but you can find them in cells responsible for the production of sperm and egg in humans.
In others for cells to keep living , the length of the telomere must be maintained and this is one of the reasons why cancer cells thrives in the body and keeps dividing and spreading because telomeres are always present in cells that keep dividing.
Telomere are very essential to growth of cancerous cells. Shortening the length of telomeres is not enough to kill cancerous cells as we have cancer cells with short length ( bone, kidney, prostate cancer). We have to combine other methods of cancer treatment to be able to eradicate the cancerous cells from the body.
Bone marrow is a body tissue where the cells are always dividing because this is crucial and essential for the replacement of old cells. In the bone marrow we can find enzyme telomerase present hence, this makes the bone marrow an exception.
