WAEC Biology Past Questions & Answers - Page 323

1,611.

Which of the following takes place during the process of detoxication in the liver?

A.

Poisonous substances in the body are converted into harmless substances

B.

Fats and oils are broken into finer particles through emulsification

C.

Excess glucose in the blood are converted into glycogen and stored

D.

Worn out red blood cells are broken down

E.

Enough heat is generated to sustain the activities of the liver

Correct answer is A

No explanation has been provided for this answer.

1,612.

The mechanism by which useful materials in the glomerular filtrate are taken back into the blood is known as

A.

filtration

B.

reabsorption

C.

haemolysis

D.

osmosis

E.

dialysis

Correct answer is B

No explanation has been provided for this answer.

1,613.

Which of the following are components of glomerular filtrate?

A.

All the components of blood except mineral salts

B.

Water and salt only

C.

All the components of blood except plasma protein and cells

D.

Plasma proteins, red, and white blood cells

E.

Blood cells, amino acid, salts, and nitrogenous wastes

Correct answer is C

No explanation has been provided for this answer.

1,614.

Breathing movement in mammals is accompanied by regular movements of the diaphragm and the

A.

intercostal muscles

B.

vertebral column

C.

clavicle

D.

pleural cavity

E.

floating ribs

Correct answer is A

No explanation has been provided for this answer.

1,615.

Gaseous exchange takes place in the adult toad through the

A.

buccal cavity, bladder, and lungs

B.

buccal cavity, skin, and lungs

C.

tympanic membrane, lungs, and gills

D.

buccal cavity, skin, and spiracle

E.

gills, skin, and buccal cavity

Correct answer is B

The toads breathe through their mouth, skin, and lungs. The mouth cavity is also referred to as the buccal cavity.