Human Anatomy and Physiology : Circulatory Physiology

Study concepts, example questions & explanations for Human Anatomy and Physiology

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Example Questions

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Example Question #21 : Help With Other Circulatory Physiology

What is the process which prevents blood loss called?

Possible Answers:

hemostasis

hemophilia

hematopoiesis 

intrinsic pathway 

coagulation

Correct answer:

hemostasis

Explanation:

Hemostasis is the number of reactions that are initiated to stop bleeding. Hemostasis means prevention of blood loss. Hematopoiesis is the formation of blood cells. Coagulation is the process of blood clotting that results in a fibrin mass. The intrinsic pathway is one of two pathways that initiate blood clotting. Hemophilia is a X-linked disorder that is caused by the absence of a clotting factor. 

Example Question #22 : Help With Other Circulatory Physiology

Which of the following cells play a role in response to allergens?

Possible Answers:

neutrophils 

eosinophils

basophils

platelets

lymphocytes 

Correct answer:

basophils

Explanation:

Basophils are classified as granulocytes. Their granules release enzymes during an allergic response. Baspophils are similar to mast cells and release histamine and heparin. Eosinophils play an important role in parasitic infections. Neutrophils are the body's first line of defense against invading bacteria. They search out, kill, and phagocytize bacteria that are involved in infection. Platelets are fragments of a larger cell called a megakarocyte. Platelets help form blood clots and prevent blood loss. Lymphocytes are involved in specific immune responses and include natural killer cells, b-lymphocytes, and t-lymphocytes.

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