Which of the following is the first response in the process of hemostasis?
Blood clot formation
Platelet aggregation
Activation of prothrombin
Constriction of smooth muscle in blood vessels
The Correct Answer is D
a. Blood clot formation: This is one of the later stages of hemostasis, involving the formation of a fibrin clot to seal the wound.
b. Platelet aggregation: This occurs after the initial vasoconstriction and is part of the platelet plug formation phase.
c. Activation of prothrombin: This occurs in the coagulation phase where prothrombin is converted to thrombin, leading to the formation of a fibrin clot.
d. Constriction of smooth muscle in blood vessels: This is the first response, known as vascular spasm or vasoconstriction, which reduces blood flow to the area and minimizes blood loss.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
a: Is the colored part of the eye - This describes the iris, which is the colored part of the eye that regulates the size of the pupil.
b. Located in the posterior cavity: The retina is a layer of tissue located in the posterior cavity of the eye. It contains photoreceptor cells that convert light into neural signals, which are then transmitted to the brain via the optic nerve.
c: Is the outermost layer of the eye - The outermost layer of the eye is the sclera, a tough, white layer that helps maintain the shape of the eye.
d: Produces aqueous humor - Aqueous humor is produced by the ciliary body and is found in the anterior chamber of the eye, not in the retina.
Correct Answer is B
Explanation
a. Mouth: The mouth is primarily responsible for the mechanical breakdown of food and the beginning of starch digestion via salivary amylase, but it is not a major site of nutrient absorption.
b. Small intestine: The small intestine is the primary site for nutrient absorption. The majority of carbohydrates, proteins, fats, vitamins, and minerals are absorbed here through its extensive surface area provided by villi and microvilli.
c. Large intestine: The large intestine primarily absorbs water and electrolytes. It is not a major site for nutrient absorption.
d. Stomach: The stomach is mainly involved in the mechanical and chemical breakdown of food, particularly proteins, but only a small amount of nutrients (e.g., alcohol, some drugs) are absorbed here.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today