The ridge that is visible externally along the midline of the scrotum is called the
A. raphe.
B. perineum.
C. tunica albuginea.
D. septum.
E. scrotal cord.
Answer: A
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Photoreceptor cells that are most useful in dim light are
A) rods. B) cones. C) amacrine cells. D) horizontal cells. E) bipolar cells.
What is the photopigment in rods?
a. melatonin b. rhodopsin c. opsin d. transducen e. carotene
Which of the following describes muscular tissue emerging directly from bone rather than being separated from it by an obvious tendon?
A. Aponeurosis B. Inverted attachment C. Direct attachment D. Indirect attachment
If the SA node is nonfunctional, which of the following is most likely to occur?
A. The heart will go into asystole (stop). B. Tachycardia will develop. C. Another portion of the heart will become the pacemaker. D. The heart will go into defibrillation. E. The heart will be desensitized.