Answer the following statements true (T) or false (F)
1. The placenta serves as a structural anchor for the baby, and it also serves as an endocrine organ.
2. Substances such as alcohol and the German measles virus can pass through the placental barrier and cause injury or developmental defects in the fetus.
3. For the first 8 weeks, the developing fertilized egg is called a zygote.
4. For the first 8 weeks, the developing fertilized egg is called a fetus.
5. From week 9 to week 39, the developing baby is called a fetus.
1. TRUE
2. TRUE
3. FALSE
4. FALSE
5. TRUE
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The somatic system is under ____________________ control, but much of skeletal muscle activity involving posture, balance, and stereotypical movements is coordinated ____________________
Fill in the blank(s) with correct word
What are the phagocytic specialists called that are within the air sacs (alveoli) of the lungs?
a. alveolar macrophages b. lung neutrophils c. respiratory phagocytes d. pulmonary scavengers e. air sac scavengers
The hair cells of the utricle and saccule are clustered in
A) ampullae. B) cristae. C) ampullary cupulae. D) maculae. E) otoconia.
The interstitial cells in the testes
A. support and protect the developing sperm cells. B. convert fructose to glucose to nourish the sperm. C. form the lining of the seminiferous tubules. D. secrete testosterone. E. undergo mitosis to produce primary spermatocytes.