Night-blindness result from a deficiency of

A. vitamin E

B. Vitamin A

C. Vitamin K

D. Vitamin C

The product of excretion common to the mammalian kidney, lung and skin is

A. mineral salt

B. carbon (IV) oxide

C. water

D. urea

An increase in air pressure in the lungs is due to the

A. increase in the volume of the thoracic cavity

B. upward movement of he ribs

C. relaxation of the diaphragm

D. contraction of the intercostal musles

One basic similarity between nervous and endocrine system is that they both

A. produce widespread effects

B. transmit very fast impulses

C. involve the use of chemical substances

D. produce precise and short-lived effect

The organ situated in the pericardia cavity of a mammal is the

A. heart

B. liver

C. stomach

D. spleen

A unique characteristics of the cervical vertebrate is the presence of

A. large centrum

B. long transverse processes

C. zgapophysis

D. vertebrartarial canal

In rabbit the chamber of the heart that receives oxygenated blood from the lungs is the

A. left ventrictle

B. left auricle

C. right ventricle

D. right auricle

The formation of water in the tissue respiration results from the

A. breakdown of water molecules

B. reduction of oxygen by hydrogen

C. reduction of carbon(IV) oxide

D. combination of water molecules

Water is necessary for a germinating seed because it

A. promotes aerobic respiration

B. activate the enzymes

C. wets the soil for proper germination

D. protects the seed from desiccation

Which of the following produces both hormones and enzymes

A. lleum

B. pancreas

C. gall bladder

D. kidney