Question

the t wave in an electrocardiogram results from *
depolarization of the ventricles
depolarization of the atria
repolarization of the ventricles
repolarization of the atria

the tricuspid valve is the valve *
between the left atrium and left ventricle
that opens from the right ventricle into the artery
between the right atrium and right ventricle
that opens from the left ventricle into the artery

dwarfism can be caused by *
hypersecretion of acth
hyposecretion of acth
hypersecretion of growth hormone
hyposecretion of growth hormone

Explanation:

1. For the ECG T wave: Ventricular depolarization creates the QRS complex, while ventricular repolarization produces the T wave; atrial repolarization is obscured by the QRS complex.
2. For the tricuspid valve: It is an atrioventricular valve located on the right side of the heart, separating the right atrium and right ventricle.
3. For dwarfism: Growth hormone regulates body growth. Insufficient secretion (hyposecretion) of this hormone during development leads to stunted growth, causing dwarfism. Hypersecretion causes gigantism/acromegaly, and ACTH affects cortisol production, not growth directly.

Answer:

1. repolarization of the ventricles
2. between the right atrium and right ventricle
3. hyposecretion of growth hormone