Exactprep NRCMA Questions

Thebrainstemis the subdivision of the brain that consists of the medulla, pons, and midbrain. It is located between the spinal cord and the cerebrum and plays a crucial role in regulating vital life functions such as heart rate, breathing, and sleep cycles. The brainstem acts as a conduit for all the information passing between the brain and the rest of the body.

Ahemacytometeris a device used in manual microscopic methods to count cells. It consists of a thick glass microscope slide with a grid etched into it. This grid allows for the counting of cells in a defined volume of fluid, making it possible to calculate the concentration of cells in a sample. The other options are not valid terms:

Hyamestometer: Not a recognized term.

Ccntraomctcr: Typographical error, not a valid term.

Hcmacountcr: Typographical error, not a valid term.

Aminortypically cannot legally act as an agent for another patient, including their younger siblings, because they are not considered legally competent to make medical decisions. A parent or a legal guardian can act as an agent for a child or a ward, as they have the legal authority to make healthcare decisions on their behalf.

Red blood cells (RBCs), also known as erythrocytes, are specialized cells in the blood responsible for carrying oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues to the lungs. RBCs contain hemoglobin, a protein that binds to oxygen molecules. Hemoglobin is composed of four subunits, each containing an iron ion that can bind one molecule of oxygen. This binding and release of oxygen are critical for cellular respiration, which provides energy for the body's metabolic processes. The unique biconcave shape of RBCs increases their surface area for efficient gas exchange and allows them to navigate through the narrow capillaries.