Lysozyme is:
A. An antibody produced by plasma cells
B. An antigen presenting protein
C. An enzyme that can destroy bacteria
D. A cytokine produced by helper T-cells
Ans: C. An enzyme that can destroy bacteria
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Matching
A) D B) A C) B D) E E) C 12) Trapezius muscle. 13) Teres major muscle. 14) The latissimus dorsi. 15) Rotates scapula. 16) Retract scapula. 17) Levator scapulae.
John Musick and Julia Ellis have proposed that the ancestral reproductive mode for elasmobranchs was "yolk-sac viviparity
" That is, embryos were retained throughout their development in the oviducts of the female and emerged as miniatures of the adults (i.e., viviparity), but nutrition was provided by yolk that was deposited at the time the egg was formed, not from the mother during development (i.e., lecithotrophy, not matrotrophy). They suggest that oviparity (depositing eggs that develop outside the body of the mother) was associated with the evolution of small body size because it increased the fecundity of small species of elasmobranchs. What is their reasoning? That is, why would oviparity provide greater fecundity than viviparity for small species of elasmobranchs? What other factors might make one mode superior to the other?
Which of the thalamus is NOT true:
A) it has laterally the posterior limb of internal capsule B) the hypothalamic sulcus (sulcus of monro) which extends from interventricular foramen to the cerebral aqueduct is the boundary between the thalamus and midbrain (mesencephalon). C) its upper surface is covered by a layer of white substance named the stratum zonale D) the stria terminalis covers the thalamostriate vein, marking a line of separation between the thalamus and caudate nucleus.
Which of the following muscles does NOT adduct the thigh?
A) pectineus B) rectus femoris C) gracilis D) adductor magnus