Answer the following statements true (T) or false (F)
1. A differential white blood cell count gives the proportions of each type of white blood cell in the blood.
2. Eosinophils help protect against infections caused by certain parasites.
3. Basophils secrete the chemical histamine during inflammatory reactions.
4. Macrophages are specialized neutrophils that increase their size after migrating out of the bloodstream.
1. TRUE
2. TRUE
3. TRUE
4. FALSE
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These muscles increase thoracic cavity dimensions by elevating the first and second ribs during forced inhalation.
A. External intercostals B. Scalenes C. Transversus thoracis D. Internal intercostals E. Serratus posterior inferior
Muscles of the pectoral girdle originate on the
A. clavicle and scapula and insert on the axial skeleton. B. humerus and insert on the axial skeleton. C. axial skeleton and insert on the humerus. D. axial skeleton and insert on the clavicle and scapula. E. humerus and insert on the clavicle and scapula.
If the Tm for a particular amino acid is 120 mg/100 ml and the concentration of that amino acid in the blood is 230 mg/100 ml, the amino acid will ________
A) appear in the urine B) be completely reabsorbed by the tubule cells C) be actively secreted into the filtrate D) be completely reabsorbed by secondary active transport
Which structure extends posteriorly from the hard palate and is inferior to the nasopharynx?
A) larynx B) vestibule C) soft palate D) external nares E) internal nares