#Essential anatomy 3 heart quiz free

The regulation of glucose concentration in the blood illustrates how homeostasis is maintained by negative feedback. Thus, in negative feedback, the variant condition is canceled, or negated, so that conditions are returned to normal. When the control center determines that conditions have returned to normal, corrective action is discontinued. Conditions are constantly monitored by receptors and evaluated by the control center. A control center, or integrator (often the brain), evaluates the change and activates a second mechanism (an effector) to correct the condition for example, cells that either remove or add glucose to the blood in an effort to maintain homeostasis are effectors. In negative feedback, a sensing mechanism (a receptor) detects a change in conditions beyond specific limits. In many cases, stable conditions are maintained by negative feedback. An organism is a system possessing the characteristics of living things-the ability to obtain and process energy, the ability to respond to environmental changes, and the ability to reproduce.Ī characteristic of all living systems is homeostasis, or the maintenance of stable, internal conditions within specific limits.The digestive system, for example, involves the coordinated activities of many organs, including the mouth, stomach, small and large intestines, pancreas, and liver. An organ system is two or more organs working together to accomplish a particular task.The heart is an organ composed of muscle, nervous, connective, and epithelial tissues. An organ is a group of different kinds of tissues working together to perform a particular activity.Muscle tissue, for example, consists of muscle cells. A tissue is a group of similar cells performing a common function.Thus, there are nerve cells, bone cells, and muscle cells. Organelles within the cell are specialized bodies performing specific cellular functions. The cell is the smallest unit of life.

At the chemical level, atoms, molecules (combinations of atoms), and the chemical bonds between atoms provide the framework upon which all living activity is based.Each perspective provides information about how or why a living system functions: Living systems can be defined from various perspectives, from the broad (looking at the entire earth) to the minute (individual atoms). Neurophysiology is the study of how the nervous system functions.Cytology is the study of cells at the microscopic level.Histology is the study of tissues at the microscopic level.Gross (macroscopic) anatomy is the study of body parts visible to the naked eye, such as the heart or bones.Some specializations within each of these sciences follow: Physiology is the study of the function of body parts and the body as a whole. What Is Anatomy and Physiology? Anatomy is the study of the structure and relationship between body parts. Quiz: Regulation of Urine Concentration.Quiz: Structure of the Digestive Tract Wall.Quiz: Function of the Respiratory System.

Quiz: Structure of the Respiratory System.

Quiz: Supplements to the Immune Response.

Quiz: Humoral and Cell-Mediated Immune Responses.

Humoral and Cell-Mediated Immune Responses.

Quiz: Specific Defense (The Immune System).

The Immune System and Other Body Defenses.

Quiz: Functions of the Cardiovascular System.

Just to the left of the xiphisternal junction. The safest site at which to insert the needle of the syringe in order to miss the pleura would be: Just below the nipple on the left.

Quiz: The Hypothalamus and Pituitary Glands You prepare to draw off some of the blood from the sac to relieve the pressure on the heart.

Quiz: The Ventricles and Cerebrospinal Fluid.

Quiz: Muscle Size and Arrangement of Muscle Fascicles.

Muscle Size and Arrangement of Muscle Fascicles.

Quiz: Structure of Cardiac and Smooth Muscle.

Quiz: Connective Tissue Associated with Muscle Tissue.

Connective Tissue Associated with Muscle Tissue.

Quiz: Chemical Reactions in Metabolic Processes.

Chemical Reactions in Metabolic Processes.

Quiz: Atoms, Molecules, Ions, and Bonds.

#Essential anatomy 3 heart quiz free

Learning anatomy and physiology is easy the trick is repetition.īut how do you practice without getting bored? Easy again: on this website you'll find more than 200 free multiple-choice quizzes covering the anatomy (structure), physiology (function) and pathologies (disorders) of the human body, and you can repeat the quizzes as often as you like. You can become an expert on the human body