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bio 20 chapter 10
bio chapter 10
| Question | Answer |
|---|---|
| Artery | A blood vessel that carries blood away from the heart. |
| Pulse | Change in the diameter of the arteries following heart contractions |
| Autonomic nervous system | the part of the nervous system that controls the motor nerves that regulate equilibrium,and that is not under conscious control |
| vasoconstriction | the narrowing of blood vessels, allowing less blood to the tissues |
| vasodilation | the widening of blood vessels, allowing more blood to the tissues |
| atherosclerosis | a degeneration of blood vessels caused by the accumulaton of fat deposits in the inner wall |
| Arteriosclerosis | a group of disorders that cause the blood vessels to thicken,harden, and lose their elastictiy |
| aneurysm | a bulge in the weakned wall of a blood vessel, usually an artery |
| Vein | a blood vessel that carries blood toward the heart |
| septum | a wall of muscle that separates the right and left sidesof the heart |
| pulmonary circulatory system | the system of blood vessels that carries deoxygenated blood to lungs and oxygenated blood back to the heart |
| systemic circulatory system | the system of blood vessels that carries oxygenated blood to the tissues of the body and deoxygenated blood back to the heart |
| Atrium | a thin-walled chamber of the heart that receives blood from veins |
| Ventricle | a muscular, thick-walled chamber of the heart that delivers blood to the arteries |
| atrioventricular (AV) valve | a heart valve that prevents the backflow of blood from a ventricle into an atrium |
| semilunar valve | a valve that prevents the backflow of blood from an artery into a ventricle |
| aorta | the largest artery in the body; carries oxygenated blood to the tissues |
| coronary artery | an artery that supplies the cardiac muscle with oxygen and nutrients |
| myogenic muscle | muscle that contacts without external nerve stimulation |
| sinoatrial (SA) node | a small mass of tissue in the right atrium that originates the impulses stimulating the heartbeat |
| atrioventricular (AV) node | a small mass of tissue in the right atrioventricular region through which impulses from the sinoatrial node are passed to the ventricles |
| Purkineje Fibre | a nerve fibre that branches and carries electrial impulses throughout the ventricles |
| Sympathetic nervous system | A division of the autonomic nervous system that prepares the body for stress |
| parasympathetic nervous system | a division of the autonomic nervous system that returns the body to normal resting levels fallowing adjustments to stress |
| diastole | relaxtion (dilation)of the heart, during which the atria fill with blood |
| systole | contraction of the heart, during which blood is pushed out of the heart |
| cardiac output | the amount of blood pumped from the heart each minute |
| stroke volume | the quantily of blood pumped with each beat of the heart |
| sphygmomanometer | a device used to measure blood pressure |
| thermoregulation | maintenance of body temperature within a range that enables cells to function efficiently |
| hypothalamus | region of a vertebrate's brain responsible for coordinating many nerve and hormone functions |
| extracellular fluid (ECF) | fluid that occupies that spaces between cells and tissues; includes plasma and interstitial |
| filtration | the selective movement of materials through capillary walls by a pressure gradient |
| lymph | the fluid found in lymph vessels that contains some proteins that have leaked through capillary walls |
| lymph node | a mass of tissue that stores lymphocytes and removes bacteria and foreign particles from the lymph |
| lymphocyte | a white blood cell that produces antibodies |
| spleen | a lymphoid organ that acts as a reservoir for blood and a filtering site for lymph |
| thymus gland | a lymphoid organ in which T lymphocytes mature |
Created by:
texas_cf
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