Question

These cells activate other immune cells and are essential for a proper function immune system.

Select one:

a. Cytotoxic T cells

b. Helper T cells

c. Neutrophils

d. T regulatory cells

Indicated whether pH, HCO3-, H+ or PCO2 level in the blood would be increased or decreased for the given Acid-Base disturbance.

Imbalance	pH	HCO3-	H+	PCO2
Respiratory acidosis

increase or decrease

The amount of calcium released from the sarcoplasmic reticulum is indirectly promotional to the strength of cardiac contraction. (i.e. more calcium release = weaker contraction)

Select one:

True

False

An autoimmune disease is the result of an inactive immune system.

Select one:

True

False

Iron absorption is regulated to prevent excess accumulation of potential harmful iron ions.

Select one:

True

False

Answer 1

1) b) T Helper Cells

Explanation:

2) In respiratory acidosis

pH	HCO3-	H+	pCO2
decreases	increases	Decreases	Increases

Explanation: In respiratory acidosis, the pH of the blood decreases due to retention of the CO2 in the blood due to respiratory disorder. Kidney tries to compensate this by retaining the HCO3- leading to increase level of HCO3-.

3) False

Explanation:The amount of calcium released from the sarcoplasmic reticulum is directly proportional to the strength of cardiac contraction. (i.e. more calcium release = more stroneger contraction). This is because more troponin is activated reslting in more cross bridge formation leading to stronger contraction.

4) False

Explanation: An autoimmune disease occurs due to an overactive immune system causing damage to their own cells.

5) True