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

How does plant cell change its shape?

How does lymph circulate in the body?

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 blood circulate in human body?

How does a bullet pierce a target?

Select the correct biological term. Lymphocytes, red cells, leucocytes, plasma, erythrocytes, white cells, haemoglobin, phagocyte, platelets, blood clot. destroyed in the liver and spleen after circulating in the blood for four months

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