Brain & Nervous System
These two structures make up the central nervous system.
What are the brain and spinal cord?
This is the body's largest organ.
What is the skin?
These retinal photoreceptors are especially important for vision in dim lighting.
What are rods?
This chamber pumps oxygen-poor blood toward the lungs.
What is the right ventricle?
This hormone lowers blood glucose by promoting glucose uptake and storage.
What is insulin?
These branchlike parts of a neuron receive incoming signals.
What are dendrites?
This is the outermost major layer of the skin.
What is the epidermis?
This colored part of the eye regulates pupil size.
What is the iris?
These blood vessels carry blood away from the heart.
What are arteries?
Often called the master gland, this endocrine gland regulates several other endocrine glands.
What is the pituitary gland?
This region of the brainstem helps control breathing and heart rate.
What is the medulla oblongata?
This protein helps make the epidermis tough and resistant to water loss.
What is keratin?
Commonly called the eardrum, this membrane vibrates when sound waves strike it.
What is the tympanic membrane?
This structure is called the heart's natural pacemaker.
What is the sinoatrial (SA) node?
Thyroxine, also called T4, is produced by this gland.
What is the thyroid gland?
This insulating covering around many axons allows nerve impulses to travel faster.
What is myelin?
This skin layer contains blood vessels, sensory receptors, and sweat glands.
What is the dermis?
This cranial nerve carries hearing and equilibrium information toward the brain.
What is the vestibulocochlear nerve (CN VIII)?
This term describes the contraction phase of the ventricles.
What is ventricular systole?
This hormone helps the kidneys conserve water and reduce urine output.
What is antidiuretic hormone (ADH)?
A patient has trouble coordinating movements and maintaining balance after a brain injury. This brain region may be damaged.
What is the cerebellum?
During exercise, sweat evaporates from the skin and produces this effect on the body.
What is cooling or a decrease in body temperature?
A patient can hear normally but struggles to detect rotational movements of the head. These structures may be impaired.
What are the semicircular canals?
Unlike most veins, these vessels carry oxygen-rich blood from the lungs to the left atrium.
What are the pulmonary veins?
When blood calcium levels drop, this hormone is released to help restore calcium levels.
What is parathyroid hormone (PTH)?