Biology Test 355

Directions For Questions

Given below are four statements (i-iv) regarding human blood circulatory system.

(i) Arteries are thick-walled and have narrow lumen as compared to veins.

(ii) Angina is acute chest pain when the blood circulation to the brain is reduced.

(iii) Persons with blood group AB can donate blood to any person with any blood group under ABO system.

(iv) Calcium ions play a very important role in blood clotting.

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Which two of the above statements are correct?

Biology Test 35...

Question 1

130/90 mm Hg is considered high and requires treatment.

100/55mmHg is considered an ideal blood pressure.

105/50 mm Hg makes one very active.

190/110 mm Hg may harm vital organs like brain and kidney

Question 2

Complex QRS - one complete pulse

Peak T - initiation of total cardiac contraction

Peak P and peak R together - systolic and diastolic blood pressures

Peak P- initiation of left atrial contraction only

Question 3

(ii) and (iii)

(iii) and (iv)

(i) and (iv)

(i) and (ii)

Question 4

(i) and (iv)

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

Question 5

mature RBCs

a mature spermatozoan

hair root

an enucleated ovum.

Question 6

500 mL

350 mL

150 mL

750 mL

Question 7

Oxygen decreases and carbon dioxide increases

Oxygen increases and carbon dioxide decreases

Both oxygen and carbon dioxide decreases

Both oxygen and carbon dioxide increases

Question 8

Movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and the atmosphere.

Inspiration is initiated by contraction of the diaphragm which increases the volume of thoracic chamber.

The contraction of the external intercostal muscles lifts up the ribs and the sternum causing decrease in the volume of thoracic chamber.

On an average, a healthy human breathes 12-16 times/minute.

Question 9

Inert crystalline structure

Abnormally folded protein

Free RNA without protein coat

Free DNA without protein coat.

Question 10

i, ii, iii, iv

i, ii, iii

ii, iii, iv

iv

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