Lab 6

Question 1

A blood pressure cuff that is too large results in an inaccurately low
measure of systolic blood pressure BECAUSE using a blood pressure
cuff that is too large makes it harder to occlude the arteries in the
arm.

Answer 1

3. if the first statement is true and the second is false

Question 2

What is wrong with using a blood pressure cuff that is too small?

Answer 2

This will not cover 80% of your upper arm. Upon inflation, it will have to be pumped up to a much higher blood pressure to completely obstruct the blood flow though the brachial after. This means that the Korotkoff sounds (marking systolic blood pressure) start earlier during the release of pressure from the cuff, giving a higher measurement.

Question 3

What is wrong with a cuff that is too large?

Answer 3

This will cover more than 80% of your upper arm. Upon release it will obstruct the blood flow through the brachial artery for longer, to lower the pressure. Korotkoff sounds start later during the release of pressure from the cuff giving a lower measurement

Question 4

How do we calculate BMI?

Answer 4

body weight/body height^2

Question 5

How do we calculate body surface area?

Answer 5

sqrt[(body weight in kg x body height in cm)/3600]

Question 6

How do we calculate total fat mass?

Answer 6

body weight (g) x (%fat/100)

Question 7

How do we calculate free fat mass?

Answer 7

body weight x [1 - (%fat/100)]

Question 8

How would body size affect the LV volume?

Answer 8

Taller people have larger hearts with larger LV volume which is required to perfuse more body tissues

Question 8

How would body size affect the LV volume?

Answer 8

Taller people have larger hearts with larger LV volume which is required to perfuse more body tissues

Question 9

With which variables is LV EDV very weakly associated with?

Answer 9

Ejection fraction

Question 10

With which variables is LV EDV weakly associated with?

Answer 10

BMI
TFM
SBP
HR

Question 11

With which variables is LV EDV moderately associated with?

Answer 11

Body weight
body height
BSA
FFM
VO2 max

Question 12

Heart size (LV volume) inmost strongly correlated with what?

Answer 12

Physical fitness (VO2 max)

Question 13

A correlation between two variables:
1) has very distinct cut-off points for the level of correlation
2) can only have a negative association
3) can not be quantified
4) does not necessarily indicate a causative association
between the two variables

Answer 13

4) does not necessarily indicate a causative association between the two variables