(BOOST YOUR GRADES FOR 2024 EXAMS). WGU C492 Peripheral Vascular System and Lymphatic System - Physical Assessment Practice Test Questions and answers, 100% Accurate. VERIFIED Ischemia

WGU C492 Peripheral Vascular System and Lymphatic System - Physical Assessment Practice Test Questions and answers, 100% Accurate. VERIFIED Ischemia a deficient supply of oxygenated arterial blood to a tissue caused by obstruction of a blood vessel Peripheral artery disease (PAD) affects noncoronary arteries and usually refers to arteries supplying the limbs. It usually is caused by atherosclerosis, and less commonly by embolism, hypercoagulable states, or arterial dissection. 3 mechanisms to keep blood moving in the veins 1. contracting skeletal muscles that milk the blood proximally, back toward the heart 2. the pressure gradient caused by breathing, in which inspiration makes the thoracic pressure decrease and the abdominal pressure increase 3. the intraluminal valves, which ensure unidirectional flow. Each valve is a paired semilunar pocket that opens toward the heart and closes tightly when filled to prevent backflow of blood. Functions of the spleen (1) to destroy old red blood cells (2) to produce antibodies (3) to store red blood cells (4) to filter microorganisms from the blood B lymphocytes originate in the bone marrow and mature in the lymphoid tissue. Pregnancy Hormonal changes cause vasodilation and the resulting drop in blood pressure. The growing uterus obstructs drainage of the iliac veins and the inferior vena cava. This condition causes low blood flow and increases venous pressure. This in turn causes dependent edema, varicosities in the legs and vulva, and hemorrhoids. Infants and Children Lymphoid tissue is well developed at birth and grows rapidly until age 10 or 11 years. By 6 years of age the lymphoid tissue reaches adult size; it surpasses adult size by puberty, and then it slowly atrophies. Lymph nodes are relatively large in children, and the superficial ones often are palpable. With infection, excessive swelling and hyperplasia occur. Enlarged tonsils are familiar signs in respiratory infections. The excessive lymphoid response also may account for the common childhood symptom of abdominal pain with seemingly