Briefly describe the vascular, platelet, and coagulation phases of hemostasis
What will be an ideal response?
During the vascular phase, local blood vessel constriction (vascular spasm) occurs at the injury site. In the platelet phase, platelets are activated, aggregate at the site, and adhere to damaged blood vessel surfaces. In the coagulation phase, factors released by platelets and endothelial cells interact with clotting factors (through either the extrinsic pathway, the intrinsic pathway, or the common pathway) to form a blood clot, a process involving the conversion of soluble fibrinogen to insoluble fibers of fibrin.
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What part of long bones contains high levels of oxygen?
A. Medulla B. Ends C. Shaft D. Marrow
Which statements are true regarding the discovery of the double helix of DNA? select all that apply.
a) Watson, Crick, Wilkins and Franklin received in 1962 the Nobel prize for their work on DNA b) Rosalind Franklin's X-ray diffraction showed that the DNA is a helix c) Watson and Crick published their findings on the structure of the dNA without performing any experiments of their own
A molecule produced by cells of the right arm moves into a nearby lymphatic vessel. This molecule will eventually enter the bloodstream by passing through the ________ into the ________.
A. right lymphatic trunk; right subclavian vein B. thoracic duct; right subclavian vein C. thoracic duct; superior vena cava D. right lymphatic trunk; superior vena cava
The external ear and larynx are made of fibrocartilage tissue.
Indicate whether the statement is true or false