1List three central limitations to aerobic capacity (VO2max)                                                            3 points

2List two peripheral limitations to aerobic capacity (VO2max)                                                         2 points

3Do Kravitz and Dalleck believe that central or peripheral limitations limit VO2max?                  1 point

4What is the lactate threshold?                                                                                                             1 point

5Define exercise economy                                                                                                   

Answer:

1. pulmonary diffusion, cardiac output, and blood volume and flow

2. muscle diffusion capacity, and capillary density

3. Kravitz and Dalleck believe that both the central and peripheral limitations limit VO2max, although the relative importance of each component is being discussed, researched and debated.

4. The lactate threshold refers to the intensity of exercise at which point there is an abrupt increase in blood lactate levels resulting in the exercising muscles to become fatigued.

5. Exercise economy can be defined as the oxygen consumption that is required by the body to perform a given exercise.

Explanation:

1. The central limitation of maximum oxygen uptake (VO2max) refers to the limitations of the cardiovascular system to transport oxygen to the exercising muscles.

The three central limitations to aerobic capacity are:

2. Peripheral limitations refers to those factors which limit the ability of exercising muscles to extract and utilize oxygen, which has been transported by the cardiovascular system.

Two of these limitations include:

3. Kravitz and Dalleck believe that both the central and peripheral limitations limit VO2max, although the relative importance of each component is being discussed, researched and debated.

4. The lactate threshold refers to the intensity of exercise at which point there is an abrupt increase in blood lactate levels resulting in the exercising muscles to become fatigued.

In untrained endurance athletes, the lactate threshold occurs at between 50 - 60 % VO2max, whereas it increases to between 70 - 90 % in well-trained endurance athletes.

5. Exercise economy can be defined as the oxygen consumption that is required by the body to perform a given exercise.

What happens if the cardiovascular system becomes unhealthy?​

Which is a sign of reproductive maturity?
O the start of menstruation
O the strengthening of muscles
O the growth of body hair
O a larger body frame

A physician orders meperidine 1.1 mg/kg diluted in 120 mL of water po every four hours as needed for pain for a 66-lb child. In stock: meperidine oral solution 50 mg/5 mL. What volume of medication should be added to 120 mL of water per dose?

You are a transplant surgeon who is preparing to do a heart transplant on a young mother. The donor has been identified and the organ is being harvested right now. It should be to you within 12 hours. The timing was good. You do not believe that the mother would have lived much longer without the transplant. You know that there are a number of people on the transplant list that will not be so lucky. When you are discussing the procedure with her husband, you realize that she has recently been exposed to her young daughter who has just come down with chickenpox. She has never had chickenpox before and you are concerned. If you convey this information to the transplant team, she will not receive the transplant. The heart will go to the next match on the transplant list. There is no real reason to expect that she will become ill. However, if she does, it is not likely that she will be able to overcome the virus with the anti-rejection drugs she will be given. She could become very sick and even die. If she does, then the transplant will not go to another.

What are the ethical issues that you face?

What should you do?

What would you do?

How would you convert days into weeks?
A. Subtract 7 from the number of days.
B. Divide the days by 7.
C. Multiply the days by 7.
D. Add 7 to the number of days.

Who will the Department of Insurance hold responsible for the exaggeration if it is a human error?

Which of the following is a sign that a person may be attempting an unrealistic health goal?
a. Weight Loss
b. Muscle Strength
c. Tendon Rupture
d. Joint Flexibility

Hurry! This is URGENT!!!!

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Which of the following is an example of convenience sampling?

intentionally surveying a population of men about football preferences instead of women in order to focus more on the male response

a dentist surveying patients about toothpaste preference

taking data from a random selection of people across the country on television program preferences

surveying college students from ten different universities on academic rigor over ten years

Physical fitness has many benefits, which we learned about in the unit. Can you think of any disadvantages or negative consequences to working on your physical fitness? List and briefly explain two possible negative side effects that could happen when you're being physically active.

Xander has been told to balance his diet with more fruits and vegetables. When
preparing his meals, how much of the plate should be fruits and vegetables?
15 percent
O 50 percent
0 25 percent
O 20 percent