Which of the following element is required for production of thyroxin?

• NaCl

• Iodine

• Bromine

• Fluorine

Receptors for FSH is present on:

• Leydig cells

• Sertoli cells

• Peritubular cells

• Spermatogonium germ cells

During gametogenesis in male, cell during development are termed as primary spermatocytes when they are :

• Before meiosis - I

• After meiosis - I

• After meiosis - II

• Mature sperms

4.

Neuropeptides and neurotransmitters are molecules secreted by neuron. Which statement is correct statement about neuropeptide as compare to neurotransmitter?

• Less potent and short acting

• More potent but short acting

• Less potent but long acting

• More potent and longer acting

There is small gap between two neurons at synapses. the purpose of gap is

• unidirectional flow of information

• reabsorption of neurotransmitter

• Coupling of charge over membrane

• slow down speed of propagation

Which of the following is not a characteristic of phylum Chordata?

• Pharyngeal slits

• Amniotic egg

• Post and tail

• Notochord

If the core body temperature of a human rise above normal, which of the following processes would be initiated sequentially for thermo‐regulation?

• Peripheral vasodilation, increased rate of respiration, tachycardia

• Peripheral vasodilation, increased rate of respiration, bradycardia

• Peripheral vasodilation, decreased rate of respiration, tachycardia

• Peripheral vasodilation, decreased rate of respiration, bradycardia

During urine formation the filtration of blood at the glomerulus is

• An active process

• An osmotic process

• Is a pressure- dependent physical process

• An non-energy- mediated transport process

Which statement is not correct for blood?

• Mature RBC is of larger size as compare to its precursor cells

• Platelets play important role in blood clotting   

• Neutrophils are major phagocytic cells   

• Basophils are present in least amount  

When a person enters a dark room from bright sunlight he cannot see anything for a few seconds because

• Rhodopsin pigment of rod cells is inactivated in bright light which takes time and is activated in dark and associate with opsin protein.     

• Scotoposin proteins of rods are denatured  

• All Scotoposin are bound with retinal in rod cells   

• All Scotoposin becomes non-functional in bright light