Which is not correct regarding articulations?
A. An articulation is a joint between a bone and another bone, cartilage, or tooth.
B. All articulations contain some type of cartilage.
C. Arthrology is the scientific study of articulations.
D. Articulations can range in motion from freely mobile to immobile.
E. There are three structural categories of articulations.
B
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In the vertebrate brain and spinal cord, white matter consists of __________ and gray matter consists of __________
A) Axons and myelin; cell bodies and dendrites B) Sensory neurons; motor neurons C) Axons and myelin; ganglia D) The dorsal horn; the ventral horn Fill in the blank with correct words.
Cells that respond to peptide hormones usually do so through a sequence of biochemical reactions involving receptor and kinase activation. In order for cells to respond, it is necessary for first and second messengers to communicate
This is possible because ________. A) peptide hormones are converted by cell membranes enzymes into second messengers B) G protein acts as the link between first and second messengers C) the hormone receptor complex moves into the cytoplasm as a unit D) hormones alter cellular operations through direct stimulation of a gene
Fusion of the pronuclei forming the zygote is known as
A) penetration. B) gamete formation. C) meiosis. D) fertilization. E) amphimixis.
Involution occurs because
a. FSH and LH levels rise b. uterine contractions strengthened the myometrium c. hCG levels fall d. of a fall in circulating estrogen and progesterone e. both (c) and (d)