Fluid, Electrolyte, Acid-Base Outline. Fluid, Electrolyte, Acid-Base Notes. Endocrine System Outline. Endocrine System Notes. Endocrine System PP. Male Reproductive System Outline. Male Reproductive System Notes. Male Reproductive System PP. Female Reproductive System Outline. Female Reproductive System Notes.
Female Reproductive System PP. Genetics Outline. Genetics Notes. Genetics PP. There is no Embryology Outline. Embryology Notes. Embryology PP. Practice Quizzes. Blood Practice Quiz. Heart Practice Quiz. Blood Vessels Practice Quiz. Lymphatic System Practice Quiz. Immune Responses Practice Quiz. Respiratory System Practice Quiz. Digestive System Practice Quiz.
Urinary System Practice Quiz. Endocrine System Practice Quiz. Male Reproductive System Practice Quiz. Female Reproductive System Practice Quiz. There are no quizzes for Genetics or Embryology. Miscellaneous Materials. Exam 1 Study Guide. Exam 2 Study Guide. Midterm Exam Study Guide.
Cardiac output is the amount of blood pumped out by each side of the heart in one minute. It is the product of the heart rate and the stroke volume.
Arterial pulse pressure and blood pressure measurements, along with those of respiratory rate and body temperature, are referred to collectively as vital signs in clinical settings. The right and left sides of the heart work together in achieving a smooth flowing blood circulation. Specialized cell membrane structures that decrease electrical resistance between the cells allowing action potentials to pass efficiently from one cell to adjacent cells are the:.
Extensive capillary network B. Intercalated disks C. Mitochondria D. Gap junctions. D: Gap junctions are a specialized intercellular connection between a multitude of animal cell-types. They directly connect the cytoplasm of two cells, which allows various molecules, ions and electrical impulses to directly pass through a regulated gate between cells.
A: Extensive capillary networks allows abundant supply of oxygen and nutrients on tissues such as skeletal muscle, liver, and kidney. B: Intercalated disks support synchronized contraction of cardiac tissue. They occur at the Z-line of the sarcomere and can be visualized easily when observing a longitudinal section of the tissue. C: Mitochondrion is an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. Complete the diagram so that it will show the correct route of blood in the heart.
Answer: D. Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium.
As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve. When the ventricle is full, the tricuspid valve shuts. This prevents blood from flowing backward into the right atrium while the ventricle contracts. As the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs, where it is oxygenated.
The oxygenated blood then returns to the heart through the pulmonary veins. The pulmonary veins empty oxygen-rich blood from the lungs into the left atrium. As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve. When the ventricle is full, the mitral valve shuts. This prevents blood from flowing backward into the atrium while the ventricle contracts. As the ventricle contracts, blood leaves the heart through the aortic valve, into the aorta, and to the body.
B: The blunt, rounded point of the heart is the apex. A: The aorta is the largest artery that carries blood from the left ventricle to the body. C: The larger, flat portion at the opposite is the base.
The pericardium is also called the pericardial sac. It has a fibrous outer layer and a thin inner layer that surrounds the heart.
None of the above. Sodium ions then diffuse into the cell, causing depolarization. Calcium ions then diffuse into the cell and cause depolarization. Which of these statements regarding the conduction system of the heart is TRUE? The sinoatrial SA node of the heart acts as the pacemaker. The SA node is located on the upper wall of the left atrium. The AV node conducts action potentials rapidly through it. Action potentials are carried slowly through the atrioventricular bundle.
B: The SA node consists of a cluster of cells that are situated in the upper part of the wall of the right atrium the right upper chamber of the heart.
C: When action potentials reach the AV node, they spread slowly through it. D: Action potentials pass slowly through the atrioventricular node. The P wave results from repolarization of the atria. The QRS complex results from depolarization of the ventricles. The T wave represents repolarization of the auricles. During the P-R interval, the ventricle contract. The QRS complex results from depolarization of the ventricles, and the beginning of the QRS complex precedes ventricular contraction.
A: The P wave results from depolarization of the atrial myocardium, and the beginning of the P wave precedes the onset of atrial contraction.
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