Question

During vigorous physical exercise, lactic acid is formed from glucose in the muscle cells because there is

(A) Lack of oxygen (C) Excess of carbon dioxide

(B) Lack of water (D) Excess of oxygen



2.The breakdown of pyruvate to give carbon dioxide, water and energy takes place in the

(A) Cytoplasm (C) Mitochondria

(B) Chloroplast (D) Nucleus



3.The respiratory pigment in human beings is

(A) Carotene (C) Chlorophyll

(B) Haemoglobin (D) Melanin



4. The part where exchange of gases takes place is

(A) Trachea (C) Alveoli

(B) Bronchiole (D) Bronchi



5.Which chambers of human heart contain oxygenated blood? A. Left atrium and left ventricle .

B. Left atrium and right ventricle

C. Right atrium and left ventricle

D. Right atrium and right ventricle



6. Which one indicates hypertension or high blood pressure (BP)?

A. 120/80

B. 110/70

C. 110/80

D. 140/90

​

Answer 1

ANSWER :

1. During vigorous exercise, lactic acid is formed from glucose this is due to absence of oxygen.

2. The breakdown of pyruvate, to give carbon dioxide, energy and water occurs in the cytoplasm.

3. The respiratory pigment is chlorophyll

4. The part where exchange of gases takes place is alveoli.

5. left atrium and ventricle contains the oxygenation blood.

6.140/90

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Answer 2

Answer:

Q1

ANS: A LACK OF OXYGEN

Q2

ANS: B MITOCHONDRIA

Q3

ANS: A CAROTENE

Q4

ANS: B ALVEOLI

Q5

ANS; D RIGHT...

Q6

AND: D 14O BY 90