What would be the effect of a genetic defect in a clotting factor that normally is part of the conversion of fibrinogen into fibrin?
A. Platelets would not be able to release serotonin.
B. Platelet-derived growth factor would be lacking and smooth muscle in the walls of broken blood vessels would not be repaired.
C. A clot that seals the break in a blood vessel would not form.
D. Plasmin would not be produced and the clot would remain on the wall of the blood vessel without dissolving.
E. Platelets would not adhere to one another to form the platelet plug.
C. A clot that seals the break in a blood vessel would not form.
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Lymph travels to the efferent lymphatic vessel from which structure in the figure?
a) A b) B c) C d) D e) E
This figure shows the muscles of the abdominal wall. What muscle or feature does number 2 indicate?
A. Rectus abdominis B. Transversus abdominis C. Internal oblique D. External oblique E. Linea alba
During a biology lab, Erin used a cotton swab to remove some tissue from the inner side of her cheek. She then placed the tissue on a slide to examine it under the microscope. If Erin removed a large chunk of this tissue from the same site, the shape and characteristics of the deepest cells would be:
a. the same shape as the original cells under the microscope. b. cuboidal. c. binucleated and circular. d. squamous.
Which type of immune disorder causes a deficiency in the immune system's ability to defend the body?
A. Anaphylaxis B. Autoimmune disorders C. Hypersensitivities D. Immunodeficiency disorders