Which statement is incorrect about a chemical buffer?
a. It consists of a pair of substances involved in a reversible reaction, one that can yield free H+ and one that can bind with free H+.
b. It minimizes changes in the pH of a solution when an acid or base is added to or removed from the solution.
c. It responds to pH changes in about three minutes, but then can be very effective in preventing dramatic pH changes.
d. It cannot actually remove hydrogen ions from the body.
e. It acts according to the law of mass action.
C
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Through what opening does the spinal cord pass?
A. Vertebral foramen B. Vertebral arch C. Transverse foramen D. Intervertebral foramen E. Central canal
Progesterone levels are highest during the ________ phase of the ovarian cycle.
Fill in the blank(s) with the appropriate word(s).
Stroke volume is defined as
a. the amount of blood pumped into the ventricles from the atria. b. the amount of blood ejected by each ventricle during a single contraction. c. the difference between the end diastolic volume and the end systolic volume for each ventricle. d. the amount of blood delivered by the vena cavae and ejected by the ventricles..
Identify the highlighted structure.
