Nutrients reach cells in the epidermis by ________
A) moving out of dermal blood vessels and diffusing through tissue fluid to the epidermis
B) moving out of blood vessels in the epidermis
C) moving out of blood vessels that originate in the hypodermis and extend into the epidermis
D) All of the above are true.
A
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In order for muscles to contract, ____ ions need to be released from the sarcoplasmic reticulum
a. sodium b. calcium c. phosphorous d. oxygen e. nitrogen
Respond to statements 94 – 98 with reference to the types of
connective tissue listed below. a. loose tissue b. dense tissue c. adipose d. cartilage e. blood E 94. Tendons are composed of this. E 95. The elasticity of skin is due to the presence of this kind of tissue. M 96. This tissue plays an important role in stabilizing body temperature. E 97. This tissue provides nourishment to each of the other connective tissues. M 98. This tissue plays a particularly important role in the thermoregulation of many marine mammals.
According to the central dogma, the process by which information in an RNA molecule is used to direct the synthesis of a polypeptide is called
A) transduction. B) translation. C) transcription. D) transition. E) transversion.
Which of the following is the best description of a gene?
A) a protein whose amino acid sequence is encoded in a segment of DNA B) A section of the nucleus where transcription takes place. C) a segment of mRNA that is translated into a protein D) a collection of millions or billions of base pairs of DNA, encoding many proteins E) a segment of DNA that is transcribed into an mRNA, a tRNA, or an rRNA