The sebaceous gland secretion called sebum has bactericidal properties.
Answer the following statement true (T) or false (F)
True
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The head end of an embryo is referred to as the __________ end.
Fill in the blank(s) with the appropriate word(s).
What type of hormones can cross the plasma membrane to bind to a receptor in the cytosol or nucleus?
What will be an ideal response?
Anterior pituitary hormones
A. bind to intracellular receptor molecules. B. are transported in the hypothalamohypophysial portal system. C. are all proteins or glycoproteins. D. are released as a direct result of action potentials. E. have a half-life of hours.
Proteoglycan molecules in the matrix of cartilage
A. give cartilage its resilient nature. B. replace collagen fibers in the matrix. C. make the perichondrium very stretchable. D. fill the lacunae. E. make cartilage hard and compact.