Which of the following is NOT true about the lymphatic system?   the vessels of the lymphatic system form a closed loop   the lymphatic system absorbs excess fluids from the tissue fluid   the lymphatic vessels can be found within capillary beds   movement of fluids within is caused by skeletal muscle motion   lymphatic vessels have a structure similar to veins

List the function(s) of lymph nodes. (Check all that apply.) Check All That Apply Filter lymph. Immune surveillance. Produce macrophages. Filter blood. Collect tissue fluid.

Which are NOT antigen-presenting cells (APCs)?     macrophages     neutrophils     monocytes     lymphocytes     dendritic cells

A neutrophil detects a pathogen, which step would most likely happen next?     Increase in intracellular levels of Arp2/3     Decrease in intracellular levels of Arp2/3     Neutrophils do not respond to pathogens.     Decreases in capZ

Lymphatic capillaries function to transport all of the following EXCEPT   Group of answer choices extracellular fluid lipids erythrocytes leukocytes invading micro-organisms

A blood donor has blood type A Positive. Which of the following recipients could this donor safely donate their blood to without the recipient having an immune reaction? (Check ALL answers that are correct. Incorrect answers that are chosen will count against your total score, though the minimum score you can get is 0, you cannot get a negative score. Be sure of the answers you select!).   AB Positive   AB Negative   A Positive   A Negative   B Positive   B Negative   O Positive   O Negative

What is the role of macrophages? Phagocytosis of foreign molecules Secrete histamine to mediate an inflammatory reaction Produce interferon to activate macrophages All of the above

What sentences isn't true? Platelets are fragments of cell The granules in basophils contain histamine Red blood cells don't have a nucleus Red blood cells are the smallest cells inside of the body. Each hemoglobin molecule can carry one molecule of molecular oxygen.

What happens during the initial stage of acute inflammation? O brief vasodilation followed by vasoconstriction and recruitment of macrophages brief vasoconstriction followed by vasodilation resulting in edema brief vasoconstriction followed by vasodilation resulting in excess tissue production recruitment of neutrophils and macrophages that result in edema

In a normal individual, large proteins _____ blood capillaries and ______ lymph capillaries. Select one: a. can enter/leave; cannot enter b. cannot enter/leave; can enter c. can enter/leave; can enter d. cannot enter/leave; cannot enter