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Anatomy & Physiology: Endocrine System and Blood Components

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  • What are the major endocrine glands?

    The major endocrine glands include the pituitary, thyroid, parathyroid, adrenal, pineal, pancreas, ovaries, and testes.

  • Which gland secretes insulin and what is its function?

    The pancreas secretes insulin, which lowers blood glucose levels by facilitating cellular glucose uptake.

  • What hormone does the thyroid gland secrete and its primary function?

    The thyroid gland secretes thyroxine (T4) and triiodothyronine (T3), which regulate metabolism and energy production.

  • Name the components that make up blood.

    Blood is composed of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes).

  • What is the primary function of red blood cells?

    Red blood cells transport oxygen from the lungs to body tissues and carry carbon dioxide back to the lungs.

  • List the types of white blood cells you should identify.

    The white blood cells include neutrophils, lymphocytes, monocytes, eosinophils, and basophils.

  • What is the function of neutrophils?

    Neutrophils are the first responders to infection and perform phagocytosis to destroy bacteria.

  • What role do lymphocytes play in the immune system?

    Lymphocytes are responsible for adaptive immunity, including B cells producing antibodies and T cells destroying infected cells.

  • How do eosinophils contribute to immune defense?

    Eosinophils combat parasitic infections and modulate allergic inflammatory responses.

  • What is the function of basophils in blood?

    Basophils release histamine and other chemicals during allergic reactions and inflammation.

  • Describe the role of monocytes in blood.

    Monocytes migrate into tissues to become macrophages, which phagocytize pathogens and debris.

  • What are platelets and their function?

    Platelets are cell fragments that initiate blood clotting to prevent bleeding.

  • What determines a person's blood type?

    Blood type is determined by the presence or absence of specific antigens on red blood cells, mainly A, B, and Rh antigens.

  • What antibodies are present in type A blood plasma?

    Type A blood plasma contains anti-B antibodies that react against B antigens.

  • Which antigens and antibodies are found in type AB blood?

    Type AB blood has both A and B antigens on red cells and no anti-A or anti-B antibodies in plasma.

  • Explain the Rh factor and its significance in blood typing.

    The Rh factor is an antigen; if present, blood is Rh-positive, if absent, Rh-negative. It is important for blood transfusions and pregnancy compatibility.

  • How do you interpret a blood typing test result showing agglutination with anti-A serum only?

    Agglutination with anti-A serum indicates the presence of A antigens, so the blood type is either A positive or A negative depending on Rh status.

  • What is the function of hormones secreted by the adrenal glands?

    The adrenal glands secrete hormones like cortisol for stress response and aldosterone for regulating blood pressure and electrolyte balance.

  • Which hormone regulates calcium levels and which gland secretes it?

    Parathyroid hormone (PTH) regulates blood calcium levels and is secreted by the parathyroid glands.

  • What is the role of the pituitary gland in hormone regulation?

    The pituitary gland is the master gland that controls other endocrine glands by secreting hormones like growth hormone and adrenocorticotropic hormone (ACTH).