Which muscles contract during a restful expiration?
(a) external intercostals.
(b) diaphragm.
(c) abdominal.
(d) both b and c.
(d) both b and c.
Biology & Microbiology
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Essential amino acids are defined as those amino acids that:
What will be an ideal response?
Biology & Microbiology
In a resting person every minute, 20% of the blood enters the ____
a. lungs b. liver c. brain d. kidney e. skeletal muscle
Biology & Microbiology
The formation of ions involves the
A) gain or loss of electrons. B) sharing of electrons. C) gain or loss of neutrons. D) sharing of protons. E) gain or loss of protons.
Biology & Microbiology
Which condition would be most likely to cause stomata to open?
A) high levels of carbon dioxide in a leaf B) hot, dry weather and strong winds C) sunrise on a clear morning D) a cool night setting in
Biology & Microbiology