The hormones that maintain the uterine wall during the last 5 to 6 months of pregnancy
are
A) placental lactogen and relaxin.
B) FSH and LH.
C) human chorionic gonadotropin and synthetic estrogen.
D) placental estrogen and progesterone.
D
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Which of the following statements concerning regulation of blood flow is TRUE?
A. In the systemic circuit, high levels of CO2 and metabolites tend to cause contraction in the smooth muscle of arteriole walls. B. In the systemic circuit, increased levels of metabolic waste products and decreased oxygen concentration in tissues promote hyperemia through the tissues. C. The resistance to blood flow in brain and heart vascular beds does not vary in response to changes in local gas or metabolite concentrations. D. According to flow autoregulation, if blood pressure to an arteriole is decreased, blood flow will not return toward its original level until the original blood pressure is restored. E. If blood flow to a tissue is blocked for a period of time and then the block is removed, the result is a reactive hyperemia in which blood flow through the affected tissue remains low.
Answer the following statements true (T) or false (F)
1. The gripping of the trochlea by the trochlear notch constitutes the "hinge" for the elbow joint. 2. The ligamentum teres represents a very important stabilizing ligament for the hip joint. 3. The structural classification of joints is based on the composition of the binding material and the presence or absence of a joint cavity. 4. Synovial fluid contains phagocytic cells that protect the cavity from invasion by microbes or other debris. 5. A person who has been diagnosed with rheumatoid arthritis would be suffering loss of the synovial fluids.
The reason for the reddish tint seen in lightly pigmented skin is the molecule formed by the combination of oxygen and melanin
Indicate whether this statement is true or false.
Peristaltic waves are ________.
A) segmental regions of the gastrointestinal tract B) churning movements of the gastrointestinal tract C) pendular movements of the gastrointestinal tract D) waves of muscular contractions that propel contents from one point to another