HESI A2 Version 1 Anatomy and Physiology

Correct Answer: D

Rationale:

Correct Answer: B

Rationale: The correct answer is B, diffusion. Diffusion is the process by which oxygen moves from an area of high concentration (in the air) to an area of low concentration (in the blood) through the alveoli in the lungs. Osmosis involves the movement of water molecules across a semipermeable membrane, not oxygen molecules. Dissipation refers to the dispersal or scattering of something. Reverse osmosis is a process used in water purification, which is not relevant to the transport of oxygen in the lungs.

Correct Answer: A

Rationale: The correct answer is the hypothalamus. The hypothalamus is a region of the brain located below the thalamus that plays a crucial role in controlling the pituitary gland. It releases hormones that either stimulate or inhibit hormone production in the pituitary gland, thus regulating various bodily functions. The adrenal gland, testes, and pancreas do not directly control the hormones secreted by the pituitary gland.

Correct Answer: A

Rationale: The human body is composed of four main types of tissues: epithelial, connective, muscle, and nervous tissue. Epithelial tissue covers body surfaces, connective tissue provides support and structure, muscle tissue allows movement, and nervous tissue coordinates body activities through electrical signals. Therefore, the correct answer is four.