The cells of excitable and nonexcitable tissues share which of the following properties?
a. a threshold potential
b. a resting membrane potential
c. an ability to open the Na+ gates
d. all of these answers.
e. none of these answers.
B
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What is the pH of a 0.005 M HCl solution? Assume complete dissociation.
Following is a table of data collected from one section of an 8 A.M. physiology lab. There were 20 students present, 10 men and 10 women. Information collected from the students included their height, weight, age, and resting pulse rate. In addition, the students were surveyed to see if they smoked cigarettes, considered themselves "regular exercisers," if they had consumed caffeine the morning of the lab, and if they had eaten breakfast that day. A "y" or "n" (yes or no) was recorded to indicate their answers. Each student did "jumping jacks" for 5 minutes and recorded the time required to regain their resting heart rate, which is listed on the table as "recovery time." Finally, each student participated in an exercise designed to measure their reaction time (in milliseconds) in catching an object dropped by a lab partner according to specified criteria. Use this table to answer the following questions. Ignore statistical problems caused by small sample size, and so on.
A _____ is a molecule that can assist enzymatic reactions by moving hydrogen ions from one molecule to the next
Fill in the blank(s) with the appropriate word(s).
Which type(s) of EEG waves would you expect to be dominant in an awake person who is relaxing with eyes closed, and not concentrating on anything in particular?
A. Alpha and beta B. Alpha C. Delta D. Beta E. Theta
The ________ cavity contains the lungs, which are enfolded in the ________
A) thoracic; pericardium B) abdominopelvic; pleurae C) thoracic; peritoneum D) thoracic; pleurae E) abdominopelvic; peritoneum