Pakistan MCQs

HMG-CoA reductase is the rate-limiting enzyme in endogenous cholesterol synthesis.

DNA polymerase is an enzyme that synthesises DNA using a template strand and requires a primer.

Frank-Starling mechanism is an increase in ventricular filling produces a stronger contraction within physiological limits.

Glomerular filtration rate is the volume of plasma filtered by all functioning glomeruli per unit time.

Baroreceptor reflex is a rapid autonomic response that buffers short-term changes in arterial blood pressure.

Action potential refractory period is a period that limits immediate re-excitation of an excitable membrane after depolarisation.

Parathyroid hormone is a hormone that raises plasma calcium through bone, kidney and vitamin-D related effects.

Gastrin is a gastrointestinal hormone that stimulates gastric acid secretion and mucosal growth.

Erythropoietin is a renal hormone that stimulates red-cell production in bone marrow during hypoxia.

Ovulation is release of a mature oocyte from the dominant follicle after the mid-cycle luteinising hormone surge.

Primary haemostasis is formation of a platelet plug at a site of vascular injury.

Vestibulo-ocular reflex is a reflex that stabilises gaze during head movement by producing compensatory eye movement.