In _____________ transport, substances move across a plasma membrane without the expenditure of energy by the cell
Fill in the blank with correct word.
passive
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Water is an example of a compound.
Answer the following statement true (T) or false (F)
When blood pressure increases, a number of events occur that return blood pressure to normal. Which of the following is one of the events that occurs after an increase in blood pressure?
A. Baroreceptors are stimulated. B. Action potential frequency to the cardioregulatory center of brain decreases. C. Sympathetic stimulation of the heart increases. D. Heart rate increases. E. An increase in number of action potentials in the cardiac nerve.
Exhaustion of energy reserves or decline in pH due to production and dissociation of lactic acid causes
A) muscle contraction. B) the conduction of neural information to the muscle fiber. C) muscle relaxation. D) muscle fatigue. E) the striated appearance of skeletal muscle.
Mr. Jones has a blood pH of 7.00 and a temperature of 100.5°F. His oxygen-hemoglobin dissociation curve would
A. show no change, allowing the O2 concentration to remain stable. B. shift to the left, allowing less O2 to be released to his cells. C. shift to the right, causing more O2 to be released to his cells.