The presence of _______ within intercalated discs allow the heart's contractile cells to work together as a functional syncytium
Fill in the blank(s) with correct word
gap junctions
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Spinal reflexes bring about sympathetically induced vasodilation of arterioles during sexual arousal
Indicate whether the statement is true or false
Which cells are responsible for detecting strain in bone and stimulating osteoblasts activity?
A. Resorption cells B. B cells C. Osteogenic cells D. Osteoclasts E. Osteocytes
How do keratinocytes acquire melanin?
a. Keratinocytes acquire melanin precursors (e.g., tyrosine) from melanocytes via plasma membrane amino acid transporter proteins b. Keratinocytes phagocytize cytoplasmic processes of melanocytes that contain melanosomes c. mRNA molecules that code for melanin proteins are exported from melanocytes to keratinocytes d. Melanocytes synthesize melanocyte-stimulating hormone., which binds to recep-tors on keratinocytes e. Melanocytes undergo apoptosis and export melanosomes via a holocrine mode of secretion
Resistance to blood flow is greatest in
A. arteries. B. arterioles. C. venules. D. veins. E. capillaries.