When you are exposed to bright light, a reflex is initiated and the muscles of your iris contract to decrease your pupil size. The iris muscles are acting as a(n)
A. effector.?B. control center.?C. receptor.?D. postitive feedback.
A
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Cardiac reserve is
A. the potential increase in stroke volume someone would show if they engaged in athletic training. B. the increase in cardiac output an individual is capable of demonstrating during vigorous exercise. C. the amount of blood left in the heart after the ventricle has contracted during cardiac cycles at rest. D. the blood that the heart uses to nourish its cardiac muscle and does not put into general circulation.
The maturation that occurs within the pre-embryonic and embryonic periods is known as __________
Fill in the blank with correct word.
In which lobe of the cerebrum does Broca's area lie?
What will be an ideal response?
The corpus luteum
A. degenerates into the corpus albicans if pregnancy does not occur. B. produces mostly progesterone, but also some estrogen. C. is absolutely necessary during the first three months of pregnancy. D. All of the choices are correct.