LAB 2 Practical

Pick the answer which best explains the lag time between the start of QRS and the start of the thumb pulse.

It is the time which includes ventricular depolarization, the contraction of the ventricles and the time it takes the blood to reach the thumb.

If the duration of one cardiac cycle is 0.71 seconds, what is the heart rate? (You can use a calculator)

84.5 BPM

Label the Waves of an ECG:

p wave , t wave, r wave, s, wave, q wave

label the electrical events

atrial depolarization, ventricular depolarization, ventricular repolarization

On a normal ECG, a wave for atrial repolarization is not recorded. Why?

It occurs at the same time as ventricular depolarization and is masked by the QRS complex.

If you place the stethoscope over the brachial artery, without a blood pressure cuff in place, you would hear

no sound.

When you pump the cuff up to a pressure above the systolic pressure, you hear ___________ through the stethoscope.

no sound.

When you release the pressure in the cuff and it reaches the systolic pressure, you hear ___________ through the stethoscope.

a sound after each ventricular contraction.

When you release the pressure in the cuff and it drops below the diastolic pressure, you hear ___________ through the stethoscope.

no sound.

A person has a blood pressure of 110/70. What is their diastolic pressure?

70 mmHg

What heart event is the diastolic pressure measurement associated with?

Ventricular relaxation.

You recorded the blood pressure of two different patients.

Patient A had a blood pressure of 115/90.

Patient B had a blood pressure of 110/65.

When you then take their pulse, which patient would have the stronger pulse?

Patient B has the stronger pulse.

Could you take a person's pulse using their radial artery while someone takes a blood pressure reading at the same time, on the same arm?

No

Arterioles supplying blood to the skeletal muscles will be

dilated

Arterioles supplying blood to the kidneys will be

constricted.

Arterioles supplying blood to the skin will be

dilated.

Arterioles supplying blood to the cardiac muscle will be

dilated.

Veins carrying blood back from the legs will be

constricted.

If a person had a hematocrit reading of less than normal, what could you predict about the oxygen carrying capacity of their blood?

reduced oxygen carrying capacity

What are the components of plasma?

proteins, waste products, nutrients, electrolytes

Acute Bacterial infection

high neutrophils with increased immature neutrophils

viral mononucleosis

High lymphocytes plus atypical lymphocytes

Parasitic infection

abnormally high eosinophils

HIV(AIDS)

abnormally low lymphocytes

Result of this type

AB-

Result of this type

B+

what is this blood type

O+

The red blood cell membrane includes a "type B" recognition protein.

True

The plasma contains anti-B antibodies.

False

This blood (B-) would be an acceptable match for a person with type AB+ blood.

True

Your arteriole blood pH becomes acidic. How would this affect your respiration?

Respiration rate would increase.

As you hold your breath for one minute, what happens to.........

a) arteriole carbon dioxide levels?

CO2 levels increase.

As you hold your breath for one minute, what happens to.........

b) arteriole blood pH?

It becomes more acidic.

As you hold your breath for one minute, what happens to.........

c) arteriole oxygen levels?

O2 levels remain stable.

As you hold your breath for one minute, what happens to.........

d) your desire to breathe?

The desire to breathe increases.

Reading aloud shows voluntary control of respiration.

True

Immediately after breath holding, the respiratory rate will

be greater than normal breathing.

Immediately after breath holding, the magnitude of breathing will

be greater than normal breathing.

Lipase is produced by the

pancreas

Pepsin is produced by the

stomach.

Trypsin is produced by the

pancreas

digestive enzyme optimum pH : very acidic pH

pepsin

digestive enzyme optimum pH : neutral pH

trypsin and lipase

What are the products of the trypsin reaction?

Amino acids

What is (are) the substrate(s) of the lipase reaction?

Triglycerides

Which of the following is the visual result that would indicate that the pepsin enzyme reaction was successful (a positive result)?

Transparent film

Which of the following is the visual result that would indicate that the lipase enzyme reaction was successful (a positive result)?

Pink color

Glucose is only found in the urine if blood glucose levels are _____________ than what can be reabsorbed within the kidney.

higher

True or False: Proteins are normally found in urine.

False

Would a small amount of blood in the urine be considered abnormal?

Yes

Can you read the results of the urine test strip immediately?

No.

A high specific gravity reading means that:

the solutes in the urine are very concentrated.

urine pH can change due to diet: more acidic

high protein diet

urine pH can change due to diet: more basic

vegan diet

Insulin is released when blood glucose levels are:

high

Insulin ___________ blood glucose levels.

decreases

Glucagon is released when blood glucose levels are:

low

Glucagon ___________ blood glucose levels.

increases

Glucagon is secreted by the:

pancreas

insulin is secreted by the:

pancreas

insulin and glucagon are released into the

blood

indicate which meal would have the highest glycemic index

Sugar sweetened Coke, Sugar Frosted Flakes, and two cups of coffee (with sugar)

Indicate which meal would have the lowest glycemic index.

Bacon, eggs, and two cups of black coffee

Eating a meal that has a high glycemic index would cause blood glucose levels to:

rise quickly and then fall quickly