Question

1) A PH of A) 1 B)5 has the highest concentration of hydrogen ions highest 2) How many units of the radioactive 99Te (starting with 100 units and haif-life is 6 hours) will be left over in 30 hours? A) 12 B)6 c)3 D)1.5 3) Isotopes have an altered number of protons A) True B)false 4) Donating type O whole blood to a type A patient is considered a A) Good B) bad If there is a decrease in stroke volume and heart rate stays normal the results is cardiac output A) No change B) increase 5) for C) decrease 6) When a muscle is at a rest, glucose is converted to A) ADP B) ATP C) creatine D) glycogen 7) When a muscle is at peak activity, pyruvate is converted to lactate A) True B) false Which of the following will not result in muscle fatigue? A) Damage to the sarcolemma B) decline in pH C) reserves of glucose D) Necyes stop 8) firingl

Answer 1

1)pH is negative logarithm to base 10 of hydrogen ion concentration. So lower the pH ; more the concentration of H+ ions.So answer is A.

2)5 half lives have passed.So remaining is (1/2)^5 *100 =around 3.Because after each half life concentration reduces to half of the original.

3)False.They have same number of protons, different number of neutrons.

4)Good because O blood group doesn't have both A and B antigens.So mismatch doesn't occur.

5)Cardiac output decreases because it is the product of stroke volume and heart rate.

6)Glucose is converted to glycogen ; which is its storage form.

7)True.

8)Reserves of glucose will prevent fatigue.So answer is C.