Calcium is a bivalent ion that is responsible for neuromuscular transmission, cell membrane permeability, hormone secretion, and:
a. Bronchial constriction
b. Production of ADH
c. Release of chorionic gonadotropin
d. Smooth muscle contraction
Answer: d. Smooth muscle contraction
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In the citric acid cycle,
A. 4 ATP molecules are formed. B. carbon dioxide is released. C. oxygen atoms are released. D. hydrochloric acid is released.
Janet is homozygous dominant for the wild type allele of the gene that when mutant causes cystic fibrosis. Her brother Henry is a heterozygote. They both do not have the disease cystic fibrosis.
Answer the following statement true (T) or false (F)
Answer the following statements true (T) or false (F)
1. The morula stage precedes the embryonic stage. 2. By the end of the first trimester, the gender of the baby can be identified. 3. The primary germ layers develop during the second trimester of pregnancy. 4. Exposure to a teratogen is most dangerous to the embryo during the morula stage. 5. Teratogens can include x-rays and alcohol.
Answer the following questions true (T) or false (F)
1. The function of the pharyngotympanic (auditory) tube is to equalize air pressure on both sides of the tympanic membrane. 2. Endolymph travels within the membranous labyrinth while perilymph travels between the bony and membranous labyrinth. 3. Neurons on the superior olivary nucleus compare information from both ears to determine the loudness of sound.