Explanation

Newborn infants have poor parathormone response to falling calcium levels and this immature physiological response is more marked in preterm infants. Vitamin D nutrition is dependent on maternal supply in utero so infants of vitamin D deficient mothers are likely to suffer from vitamin D deficiency as well and may show signs of rickets - whether preterm or term. Difficulty maintaining calcium requirements in preterm infants, poor calcium absorption and possibly increased calcium loss from the kidneys due to diuretics given to manage fluid overload will contribute to poor bone mineralisation and the clinical features of rickets in the preterm infant. Young infants are prone to convulsions in association with hypocalcaemia.

Explanation

Epidemiology, the study of epidemics, is sometimes defined as the medical aspect of ecology, for it is the study of diseases in animal populations. 

Explanation

Rabies is a deadly neurologic disease caused by a virus that spreads primarily through bites of infected animals.

Explanation

Pathology is the study of the causes and effects of disease or injury. 

Explanation

White blood cells, also called leukocytes are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.

The lifespan of white blood cells ranges from 13 to 20 days

Explanation

Dengue is caused by insect bites.

Explanation

Pellagra is a disease caused by a lack of the vitamin niacin (vitamin B3).

Symptoms include inflamed skin, diarrhea, dementia, and sores in the mouth.

Areas of the skin exposed to either sunlight or friction are typically affected first.

Explanation

Answer:

D

Foot-and-mouth disease (FMD) is a catastrophic disease of livestock caused by the picornavirus. There are seven serotypes of the virus. All kinds of ungulates are vulnerable.

Explanation

Answer"

D

Reserpine derived from the plant 'serpentine' is used to alleviate high blood pressure.

Explanation

Answer:

C

The cause of milk fever is a lack of sufficient calcium in the  serum (hypocalcemia). At the end of the dry period, cows must undergo a sudden change in metabolism, switching from telogen to  high performance. During the dry season, cattle have a relatively low need for calcium.