The cells in this layer of epidermis are dead, and their flat, scale-like remnants are filled with keratin
A) stratum granulosum B) stratum spinosum
C) stratum corneum D) stratum basale
Answer: C
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A nerve impulse initiated at a muscle spindle has to travel through which of the following structures to get into the spinal column?
a) Anterior root of spinal nerve b) Posterior root of spinal nerve c) Tectospinal tract d) Central canal e) Lateral reticulospinal tract
An atom with a valence of 3 may have a total of ________ electrons.
A) 3 B) 8 C) 13 D) 17
Oncogenes and tumor-suppressor genes have similar effects on cell division
Indicate whether the statement is true or false
Emission
A) depends on waves of contractions of the preputial glands. B) begins with peristaltic contractions of the ductus deferens. C) is responsible for propelling spermatozoa into the female reproductive tract. D) involves contractions of the cremaster muscle. E) is associated with orgasm.