This question makes no sense
Answer:
Reesa must perform her training within a heart rate range of 140 and 160 bpm.
Explanation:
Reesa, a 20-year-old athlete, must work on her physical exercises taking into account that her heart rate should never exceed 200 bpm, equivalent to her maximum heart rate (MHR).
MHR is an estimate of the maximum work the heart can do without risk of injury or damage.
The formula for calculating MHR is:
<em>MHR = 220 - age
</em>
In the case of Reesa;
<em>MHR = 220 - 20 = 200 bpm.</em>
Since Reesa wants to train at 70 - 80 % of her MHR, it is calculated:
- <em>MHR70 = 200 X 70% = 200 (70/100) = 140 bpm
</em>
- <em>MHR80 = 200 X 80% = 200 (80/100) = 160 bpm </em>
<u>Reesa should adjust her work so that her heart rate stays between 140 and 160 bpm</u>.
Answer:
True.
Explanation:
The medulla (the brain stem) contains the cardiac, respiratory, vomiting, and vasomotor centers and regulates autonomic, involuntary functions such as breathing, heart rate, and blood pressure.
Answer: an organ that secrets chemical substances
Explanation: got correct on edge2020
Answer with Explanation:
Heredity and environment may play a role in connection to <em>birth defects</em>.
For example, when it comes to heredity, some genes can be transferred to children. An example of this is the <em>"sickle cell disease." </em> If parents transfer two of these genes to the child, then the child will most likely inherit the disease.
Another example, when it comes to <u>environment</u>, the exposure of a mother to certain factors like <em>radiation, drugs (teratogens), alcohol, etc</em><em>.</em> may result to birth defects in children. When it comes to alcohol, mothers who have been drinking alcohol while pregnant will deliver a baby with <em>"fetal alcohol syndrome."</em> The baby with this syndrome will have problems with his <em>learning ability, physical disproportions (esp. the face), will be hyperactive, et</em>c.