Which part of the human ear plays no role in hearing as such but is otherwise very much required?
Organ of corti
Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (Mostly in the nucleus)
Which one of the following is the correct statement for respiration in human?
Cigarette smoking may lead of inflammation of bronchi
Neural signals from pneumotaxic centre in pons region of brain can increase the duration of inspiration
Workers in grinding and stone - breaking industries may suffer, from lung fibrosis
About 90%of carbon dioxide (CO2) is carried by haemoglobin as carbamino haemoglobin
What is correct to say about the hormone action in humans?
Glucagon is secreted by -cells of Islets of Langerhans and stimulates glycogenolysis
Secretion of thymosins is stimulated with aging
In females FSH first binds with specific receptors on ovarian cell membrane
FSH stimulates the secretion of estrogen and progesterone
The maximum amount of electrolytes and water (70 - 80 percent) fromthe glomerular filtrate is reabsorbed in which part of the nephron?
Ascending limb of loop of Henle
Distal convoluted tubule
Proximal convoluted tubule
Descending limb of loop of Henle
The Leydig cells found in the human body are the secretory source of
The human hind brain comprises three parts, one of which is:
Select the correct statement regarding the specific disorder of muscular or skeletal system :-
Muscular dystrophy - age related shortening or muscles.
Osteoporosis - decrease in bone mass and higher chance of fractures with advancing age.
Myasthenia gravis - Auto immune disorder which inhibits sliding of myosin filaments
Gout - inflammation of joints due to extra deposition of calcium.
In which one of the following options the two examples are correctly matched with their particular type of immunity
Type of immunity
Polymorphonuclear leukocytes and mono cytes
Anti-tetanus and anti - snake bite injection
Saliva in mouth and Tears in eyes
Mucus coating of epithelium lining the urnogenital tract and the HCl in stomach
Anxiety and eating spicy food together in an otherwise normal human, may lead to
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?
Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal medulla.
Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse.
Hypothalamus activates the parasympathetic division of brain.
Sympathetic nervous system is activated releasing epinephrin and norepinephrin from adrenal cortex.
A certain road accident patient with unknown blood group needs immediate blood transfusion. His one doctor friend at once offers his blood. What was the blood group of the donor?
Blood group B
Blood group AB
Blood group O
Blood group A
Which one of the following is wrong statement
Anabaena and Nostoc are capable of fixing nitrogen in free living state also.
Root nodule forming nitrogen fixers live as aerobes under free-living conditions.
Phosphorus is a constituent of cell membranes, certain nucleic acids and cell proteins.
Nitrosomonas ans Nitrobacter are chemoautotrophs.
Best defined function of Manganese in green plants is:
Photolysis of water
A process that makes important difference between C3 and C4 plants is :
A nitrogen-fixing microbe associated with Azolla in rice fields is :
Which one of the following is correctly matched
Onion - Bulb
Ginger - Sucker
Chlamydomonas - Conidia
Yeast - Zoospores
The common bottle cork is a product of:
The coconut water and the edible part of coconut are equivalent to :
Select the correct statement from the ones given below with respect to Periplaneta americana.
Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives.
Males bear a pair of short thread like anal styles.
There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut.
Grinding of food is carried out only by the mouth parts.