How does a target cell recognize its appropriate hormone circulating in the blood ?

How does fuel cell operate

How does a cell perform its functions?

How do hormones maintain sugar level in the blood ?

How does a bullet pierce a target ?

How does a bacterial cell protect its own DNA from restriction enzymes?

Fill in the blanks : (i) ____ are the secretions of ductless endocrine glands and the study of endocrine glands and role of their secretions is called____. (ii) Steroid hormones are secreted by____, testes, ovaries and ____ . (iii) ____ and ____ from posterior lobe of pituitary are short peptide hormones. (iv) ___ and ___ are aminoacid derivative hormones commonly called catecholamines. (v) Steroid hormones have their receptors in the ____ of the target cells while protein hormones have their receptors on the ____ of the target cells. (vi) Hyposecretion of thyroid hormones causes ____ in infants and ___ in adults. (vii) Anterior lobe of pituitary is also called ___ while posterior lobe or pars nervosa is also termed ____ . (viii) Excess of growth hormone since childhood leads to disease called ____ and its excess after adolescence causes disease___ .

(a) Who is termed as first messenger and second messenger in the target cells ? (b) How do protein hormones act on target cells ?

What hormones are produced when the body's blood glucose levels drop below normal ? How do these hormones act to return the level to normal ? What hormone is produced when the body's blood glucose levels become elevated ? How does this hormone act to return the level to normal ?

Which of the following three statements is correct about RBC in mammals? I.Red blood cells circulating in the blood have nucleus. II. Red blood cells have similar function to white blood cells. III. Red blood cells are produced by the bone marrow.

Some cells in testis secrete testosterone and the hormone stimulating such cells are released in blood by