Which of the following statements about the circulation of blood is not correct?

A. Deoxygenated blood flows in the heart through the vena cavae

B. Blood is pumped out of the heart through the aorta

C. Oxygenated blood from the lung; is carried to the left auricle

D. The oxygenated blood enters the lungs through the pulmonary vein

E. Ventricles contract to pump blood into the aorta

A difference between the auricle and the ventricle of the mammalian heart is that the

A. ventricles carry deoxygenated blood

B. ventricles do not have outlets

C. auricles have no valves

D. walls of the ventricles are lese muscular then that of the auricles

E. Walls of the ventricles are more muscular than that of the auricles

Which of the following organism respires through the body surface

A. Man

B. Fish

C. Tridax

D. Amoeba

E. Hibiscus

The stomata of a leaf performs the same function as

A. spiracles of insects

B. trachea of toads

C. pharynx of man

D. liver of man

E. scales of fish

Which of the following does not happen during inspiration?

A. intercostal muscles contract

B. Ribs move forward

C. Thoracic cavity increases

D. Diaphragm relaxes

E. Internal air pressure decreases

Which of the these is not an excretory product of plant?

A. Tannin

B. Gum

C. Alkaloid

D. Sweat

E. Anthocyanin

Which of these is not a function of the kidney?

A. Production of urine

B. Maintenance of acid-base balance in the body

C. Osmo-regulation

D. Removal of urea

E. Production of bile

In which part of the kidney does ultrafiltration take place?

A. Bowman’s capsule

B. Distal convoluted tubule

C. Proximal convoluted tubule

D. Collecting duct

E. Afferent arteriole

Which of the following organs is concerned with detoxication of harmful compounds?

A. Kidney

B. Lungs

C. Gall bladder

D. Liver

E. Pancreas

The hormone that promotes secondary sexual characteristics in females is

A. insulin

B. thyroxin

C. testosterone

D. oxytocin

E. oestrogen