The dorsal respiratory group in the medulla oblongata is involved with ________.
A. breathing rhythm
B. expiration
C. inspiration
D. Both inspiration and expiration are correct.
Answer: C
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Hematopoiesis refers to the formation of blood cells within the red marrow cavities of certain bones
Indicate whether the statement is true or false
During normal expiration,
A) elastic recoil of stretched muscles helps return the thorax to its resting volume. B) elastic recoil of stretched muscles helps return the thorax to its resting volume and the internal intercostal muscles are required. C) the internal intercostal muscles are required. D) elastic recoil of stretched muscles helps return the thorax to its resting volume, the internal intercostal muscles are required, and the abdominal muscles become involved. E) the abdominal muscles become involved.
During thyroid hormone secretion,
a. the follicular cells phagocytize a piece of colloid. b. T4 and T3 are split off of thyroglobulin by lysosomal enzymes within the follicular cell and subsequently diffuse out of the cell into the blood. c. T4 and T3 are secreted by exocytosis of the colloid that has been internalized by the follicular cells. d. both (a) and (b) above. e. both (a) and (c) above.
Which of the following components is not one of the formed elements in blood?
a) Erythrocytes b) Plasma c) Platelets d) Leukocytes