Which of the following statements is true?
A. Hair in the axillary region is vellus hair after puberty.
B. At puberty, much of the vellus hair is replaced with terminal hair.
C. Both vellus and terminal hairs are pigmented.
D. In males, the hairs of the beard are vellus hairs.
E. The majority of hair on the chest is vellus hair.
B
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What are the dermal sensory structures that sense deep pressure?
A) Meissner's corpuscles B) lamellar corpuscle C) tactile corpuscles D) tactile dics E) Merkel cells
Which of the following statements regarding melanin is true?
A. In Addison disease, less melanin is produced. B. Melanin is a white pigment. C. Men produce more melanin than women. D. During pregnancy, melanin production is increased. E. Both melanocytes and keratinocytes produce melanin.
Near the carotid sinus,
A) the common carotid divides into an internal and an external branch. B) the internal carotids fuse with the vertebral arteries. C) the external carotid forms the internal carotid. D) veins and arteries form anastomoses. E) the aorta gives rise to the common carotids.
Place the steps of translation in the correct order, starting with what happens first.
• the tRNA is released from the ribosome and is now available to pick up another amino acid • the ribosome binds mRNA • a new amino acid is linked to the growing peptide chain • a tRNA anticodon binds to a complementary mRNA codon