The term light adaptation refers to
a. the changes that occur in the visual pigment system when going from a dark into a light environment.
b. the evolutionary changes that enable a species to maintain a diurnal life style.
c. the changes that occur in visual pigment system when going from a light into a dark environment.
d. none of these.
A
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Collections of specialized cells and extra-cellular substances around them are known as a(n) __________.
A. organelle
B. tissue
C. organ
D. organism
Which of the following parts of the nephron has two limbs with thick segments and thin segments?
A. proximal convoluted tubule B. nephron loop C. distal convoluted tubule `D. collecting system
Abnormally slow depolarization of the ventricles would most change the shape of the ________ in an ECG tracing
A) P wave B) T wave C) QRS complex D) P-R interval E) R-T interval
The term inotropy refers to the:
A. rate of cardiac contraction. B. control of electrical conduction. C. strength of myocardial contraction. D. degree of ventricular irritability.