Due to alcohol abuse, brain-related disease Korsakkoff’s syndrome occurs. Which nutrient is responsible for this syndrome?
Vitamin-B12
Fat
Protein
Vitamin-B1
D.
Vitamin-B1
Alcohol interferes with the metabolism of thiamine in the liver. Thus, alcohol intake with deficiency of vitamin B is the basis of brain related diseases called Wernicke's syndrome and Korsakoff's syndrome. Both the syndromes are associated with the destruction of cells in brain with the memory loss even of recent events and mental confusion along with the impairment of speech.
The number of chromosomes in a primary spermatocyte is
Same as in spermatid
Same as in spermatogonium
Help of that in spermatogonium
Same as in secondary spermatocyte
How many sperm cells are present in an average (3 mL) ejaculation?
200 million
300 million
400 million
500 million
Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus?
Chorion
Allantois
Yolk sac
Amnion
In human, during fertilization, a sperm firstly comes in contact with which layer of the ovum
Zona pellucida
Vitelline membrane
Jelly coat
Zona radiata
