The inner cell mass of the blastocyst is destined to become the ________:
a. embryo
b. trophoblast
c. chorionic villi
d. placenta
Ans: a. embryo
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Which of the following statements regarding the precision of locating a somatic stimulus is FALSE?
A. The precision is greater in areas of the body that have small, overlapping receptive fields than in areas with large, nonoverlapping receptive fields. B. Convergence of afferent neurons onto common ascending pathways increases acuity. C. The precision is greater in the lips and fingers than on the back. D. The precision is greater for the skin than for the internal organs. E. Lateral inhibition of parallel afferent pathways increases the precision of locating a stimulus.
Some of the most common buffers in animal cells are effective because
A) They have a pK value that is close to the normal pH of the cell. B) They can bind with H+ in a chemical reaction, forming a new product that can be eliminated from the body. C) They have very low pK values. D) Both A and B
The epidermal ridges and dermal ________ increase the area of contact between the epidermis and dermis to help connect these layers.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a condition that would be considered sensorineural hearing loss?
A. Lesion of the vestibulocochlear nerve B. Loss of flexibility of the joint between the incus and the stapes C. Degeneration of the hair cells near the base of the spiral organ D. All of the choices are conditions considered to be sensorineural hearing loss.