One difference between the erythrocytes of mammals and other vertebrates is:
a. mammal erythrocytes lack nuclei.
b. mammal erythrocytes respond to changes in water concentration.
c. mammal erythrocytes are oval with swollen centers.
d. other vertebrates do not have erythrocytes.
e. other vertebrates use a respiratory pigment other than hemoglobin.
A
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A collection of similarly specialized cells and any extracellular material they secrete and maintain describes
(a) an organ. (b) a system. (c) a tissue. (d) organelles.
The average adult has approximately 100,000 leukocytes per mm3 of blood.
Answer the following statement true (T) or false (F)
The production of testosterone is carried out in the _____.
A. epididymis B. seminiferous tubules C. Skene's gland D. interstitial cells
Which of the following statements regarding Chlamydia is TRUE?
A. Reorganization into reticular bodies activities energy production B. The elementary body replicates in the nucleus of the infected cell C. The Chlamydial inclusion body contains only reticular bodies D. The outer membrane of the elementary body is a barrier to harsh conditions E. The reticular body is transmitted between cells