List general responses to increased sympathetic activity and to parasympathetic activity
What will be an ideal response?
General responses to increased sympathetic activity include heightened mental alertness, increased metabolic rate, reduced digestive and urinary functions, activation of energy reserves, increased respiratory rate and dilation of respiratory passageways, elevated heart rate and blood pressure, and activation of sweat glands. General responses to increased parasympathetic activity include decreased metabolic rate, decreased heart rate and blood pressure, increased secretion by salivary and digestive glands, increased motility and blood flow in the digestive tract, and stimulation of urinary and defecation.
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Sketch a graph of the length-tension relationship in a contracting skeletal muscle, and explain its shape in terms of events in the sarcomere.
What will be an ideal response?
Lipid-soluble hormones, such as progesterone, exert their effects by forming hormone-receptor complexes that
A. activate a G protein and second-messenger cascade. B. activate adenylate cyclase. C. open ion channels in the cell membrane. D. bind to DNA and initiate transcription.
Cerebrospinal fluid is secreted by choroid plexuses in the ________ ventricles and reabsorbed by arachnoid villi in the ________
A) lateral, and third; superior sagittal sinus B) lateral, third, and fourth; superior sagittal sinus C) lateral; central canal of the spinal cord D) lateral, third, and fourth; central canal of the spinal cord
Hemophilia A is
A. passed from affected males to their sons. B. more common in females. C. a defect in the clotting mechanism. D. due to an X-linked dominant gene.