Discuss some of the effects of epinephrine and norepinephrine in response to a stressor
What will be an ideal response?
Epinephrine and norepinephrine increase heart rate and force of contraction; dilate the bronchioles; constrict the blood vessels supplying the skin, digestive organs, and urinary organs; dilate blood vessels supplying the skeletal muscles; dilate the pupils; and decrease digestive and urinary functions.
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Which of the following can be calculated if the tidal volume and respiratory rate are known?
A) respiratory minute volume B) inspiratory reserve volume C) expiratory reserve volume D) anatomical dead space E) forced vital capacity
If left untreated, congenital hypothroidism will result in mental disability
a. true b. false
Why does breathing continue to be rapid and deep for a time after heavy exercise?A) Extra oxygen is needed to restore muscle creatine phosphate concentration.B) The respiratory system is slow to increase and decrease its function before and after exercise, which is why it takes awhile for breathing to slow down.C) Lactic acid that builds up during heavy exercise must be exhaled into the air, so heavy breathing must continue for awhile after exercise to eliminate it.D) The ATP level in muscle cells falls drastically during heavy exercise, and extra oxygen is needed to restore it.E) The extra ventilation is not needed to replenish energy stores in muscle fibers, but rather simply to restore the blood pH to normal after the production of excess lactic acid during the exercise.
What will be an ideal response?
In an enzymatic reaction, when temperature is increased past the point of "optimal temperature," the enzyme starts to ________.
A. reduce its catalytic activity B. increase product formation C. increase its catalytic activity D. increase its allosteric properties