A powerful uterine muscle stimulant, __________ plays the key role in the progression of labor
Fill in the blank(s) with correct word
oxytocin
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The posterior fontanel is surrounded by the parietal and occipital bones.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. Glucocorticoids are steroid hormones that usually enhance the immune responses when an individual is suffering from severe stress. 2. Direct gene activation involves a second-messenger system. 3. All peptide hormone synthesis requires gene activation that produces mRNA. 4. All adenohypophyseal hormones except GH affect their target cells via a cyclic AMP second messenger. 5. The primary source of RBCs in the adult human being is the bone marrow in the shafts of the long bones.
Water is an example of a(n) ________________________________________ environment
Fill in the blank(s) with correct word
Which of the following is the last step in the process of fertilization?
A. A sperm fuses with the egg's plasma membrane. B. The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg. C. The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that a sperm cannot penetrate. D. The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus.