The uterine epithelium is broken down by the enzyme,
A) hyaluronidase.
B) acrosin.
C) urase.
D) proteoglycan.
E) relaxin.
A
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Which embryonic structures give rise to the thoracic and right lymphatic ducts?
A. Subclavian lymph sacs B. Jugular lymph sacs C. Mesoderm lymph sacs D. Jugular channels E. Subclavian channels
Define intramembranous ossification
A) Intramembranous ossification is the formation of hyaline cartilage from mesenchymal cells. B) Intramembranous ossification is the formation of elastic cartilage from mesenchymal cells. C) Intramembranous ossification is the formation of fibrocartilage from mesenchymal cells. D) Intramembranous ossification is the replacement of a cartilage model with bone. E) Intramembranous ossification is bone formation within connective tissue without the prior development of a cartilage model.
Which of the following statements is FALSE?
A. Synaptic input onto skeletal muscle cells is always excitatory, whereas inputs to smooth muscle cells may be either excitatory or inhibitory. B. A single smooth muscle cell may be innervated by both a sympathetic neuron and a parasympathetic neuron. C. Contractile activity of smooth muscle cells does not normally require Ca2+. D. In the absence of any neural input, skeletal muscle cannot generate tension. E. Ca2+ that activates contraction of smooth muscles can come from either the ECF or from the sarcoplasmic reticulum.
True or False? The ability to detect simultaneous stimulation at two points on the skin is called two-point discrimination.
Answer the following statement true (T) or false (F)