Lab Exam

Question 1

BLood pressure with area elevation

Answer 1

Decreased with arm above head cuz gravity

Question 2

BP and heart rate after exercise

Answer 2

Increase because greater sympathetic stimulation during exercise

Question 3

Tidal volume and inpiratory/expiratory reserves after exercise

Answer 3

Tidal volume increased
Both reserves decrease
Clear correlation there

Question 4

Breathing cycle post ex

Answer 4

Faster

Question 5

Rate of air flow post ex and why

Answer 5

Increased for more ox

Question 6

Exhalation air flow post ex

Answer 6

Increased for extra CO2

Question 7

Minute air flow rate post ex and why

Answer 7

Increased becasue of rate and depth

Question 8

Does vital capacity change for ex

Answer 8

No

Question 9

Contraction vs relaxation time

Answer 9

Contraction is shorter

Question 10

Why doesn’t finger twitch amplitude increase after a certain level of stimulus

Answer 10

Because at some level all the motor units have been activated

Question 11

Temporal wave summation

Answer 11

Stimulus above a certain frequency causes amplitdue of contractions to increase

Question 12

What happens after complete tetanus

Answer 12

Fatigue

Question 13

What muscles in arm contract for flex ion

Answer 13

Anterior, same side as palm

Question 14

Arm muscles for extension

Answer 14

Posterior or back side of hand

Question 15

Flexion or extension of fingers effect on EMG of arm

Answer 15

Increase activity during extension in posterior

And flexion if. Fist is closed

Question 16

Weighted extension vs flexion

Answer 16

Flexion: anterior increased cuz recruitment
Extension: posterior increase cuz recruitment
Lengthened for both

Question 17

Muscle force vs mass

Answer 17

More mass stronger force and longer time to fatigue

Question 18

Do muscle fibers have a refractory period

Answer 18

No because they can increase in magnitude

Question 19

Cold effect on pulse wave

Answer 19

Decreased it cuz vasoconstriction

Question 20

Apnea effect of HR

Answer 20

Decreases HR but increase blood pressure

Question 21

What does EMG record

Answer 21

Electrical activity of muscle fibers

Question 22

Why does fatigue happen after tetanus

Answer 22

Greater quantity of Ca2+ has been released so it takes longer for all that Ca to return to the SR delaying relaxation

Question 23

Warm effect on pulse wave

Answer 23

Higher pulse wave bcuz vasodilation

Question 24

How do ECG intervals change with exercise

Answer 24

All decreased with exercise and increased with recovery

Question 25

Motor unit

Answer 25

Group of muscle fibers controlled by one motor neuron

Question 26

Recruitment stuff

Answer 26

Basically getting more motor units involved to produce a greater strenght Can come from increased frequency or strenght of stimuli

Question 27

Summation and tetanus

Answer 27

Summation is caused by increased frequency causing amplitudes to increase because less time to relax Tetanus means no relaxing so complete tetanus is the pinnacle of summation kinda

Question 28

Contraction vs relaxation

Answer 28

Contraction is faster

Question 29

Relationship between work and weight

Answer 29

Weight generally caused more work until it weighed too much and caused a decrease in twitch amplitude

Question 30

P

Answer 30

Depolarization of SA node and atrial myocardium

Question 31

QRS

Answer 31

Ventricular depolarization

Question 32

T

Answer 32

Ventricular repolarization

Question 33

Time delay in ECG and pulse recordings

Answer 33

pace maker (atrial node) is detected by ECG and pulse happens later

Question 34

Pulse wave and temperature

Answer 34

Cold- decreases | Heat - increases

Question 35

HR with temp

Answer 35

Increased for both?

Question 36

Tidal volume

Answer 36

Normal volume from quiet breath

Question 37

Expiratory reserve volume

Answer 37

Amount forced out after tidal expiration

Question 38

Residual volume

Answer 38

Around after expiratory reserve volume leave as

Question 39

Inspiratory reserve volume -

Answer 39

amount that can be inspired after normal tidal inspiration

Question 40

FEV1

Answer 40

Forced expire volume in 1 second

Question 41

Group A 800ml water

Answer 41

Volume increase PH no change Specific grave down NaCl down

Question 42

Group B nacl

Answer 42

Volume no change PH down SG increase NaCL increas

Question 43

Group C | V

Answer 43

Volume down PH down SG increase NaCl increase

Question 44

Group D

Answer 44

Volume the same Ph up SG down NaCl down