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19 Cards in this Set

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Hormones can be grouped into the following general categories
catecholamines (epinepherine and norepinepherine), polypeptides and glycoproteins, steroids NOT nucleic acids
The steroid hormones
are derived from cholesterol
are lipid molecules, not water soluble and include the sex hormones and corticosteroids
hormones that contain the element idodine
triodothyronine, tetaiodothyroine "iodo"
which of the following is required for aparticular chemical such as a neurotransmitter or hormone to function as a physiologcal regulator in the body
the chemical must open specific io channe
Which of the following is not a broad area of function within the circulatory system?
A) neurochemical release
B) transportation
C) regulation
D) protection
A) neurochemical release
The presence of ________ in the circulatory system would be considered abnormal.
A) respiratory gas molecules, such as oxygen and carbon dioxide
B) absorbed products of digestion
C) Krebs cycle enzymes
D) metabolic wastes, water and ions
) Krebs cycle enzymes
At rest the heart of an average human will pump ________ liters of blood per minute.
A) three
B) five
C) seven
D) nine
B) five
The lymph eventually enters the circulation by draining into two specific:
A) arteries.
B) arterioles.
C) capillaries.
D) veins.
veins
The "buffy coat" that forms when whole blood is centrifuged in a test tube, is composed of
A) red blood cells.
B) white blood cells.
C) platelets.
D) white blood cells and platelets.
) white blood cells and platelets.
A normal hematocrit value of 45 means that
A) 45% of the formed elements are erythrocytes.
B) there are 45 million formed elements per ml of whole blood.
C) 45% of the total blood volume is formed elements.
D) 45 ml of plasma are tested by centrifugation.
) 45% of the total blood volume is formed elements.
The major solute dissolved in the plasma as well as the interstitial fluid is
A) glucose.
B) Na+.
C) K+.
D) albumin.
Na+
Blood clotting would not occur if there plasma were deficient in
A) globulin.
B) insulin.
C) albumin.
D) fibrinogen.
fibrinogen
Erythrocytes
A) lack both a nucleus and mitochondria organelles.
B) are the blood cell that is responsible for phagocytosis of bacteria.
C) are produced in the thymus.
D) have a circulating life span of about twelve months.
lack both a nucleus and mitochondria organelles
Aplastic anemia results in an abnormally low red blood cell count, due to
A) lack of iron content or iron absorption from the diet.
B) destruction of the bone marrow, perhaps by chemicals in the environment or chemotherapy.
C) insufficient protein in the diet in those individual suffering from malnutrition.
D) inadequate vitamin B12 absorption from the diet because the intrinsic factor is absent.
B) destruction of the bone marrow, perhaps by chemicals in the environment or chemotherapy.
Which of the following does not belong to the class of granular leukocytes?
A) neutrophil
B) basophil
C) lymphocyte
D) eosinophil
C) lymphocyte
Platelets
A) have a life span of about 120 days.
B) are the largest of the formed elements and are also called megakaryocytes.
C) release a chemical called serotonin that constricts blood vessels.
D) have proteins in the membrane that activate clotting factors.
) release a chemical called serotonin that constricts blood vessels.
In general, which of the following cells has the shortest life span?
A) erythrocytes
B) platelets
C) agranular leukocytes
D) granular leukocytes
) granular leukocytes
Which of the following cells is present in the blood in greatest numbers?
A) erythrocytes
B) platelets
C) agranular leukocytes
D) granular leukocytes
A) erythrocytes
Which of the following leukocytes usually accounts for less than 1% of white blood cells present?
A) neutrophils
B) eosinophils
C) basophils
D) lymphocytes
C) basophils