Which of the following statements is false?
(a) Cytochalasins prevent actin polymerization.
(b) Actin filaments are usually excluded from the cell cortex.
(c) Integrins are transmembrane proteins that can bind to the extracellular matrix.
(d) ARPs can promote the formation of branched actin filaments.
(b) Much of the actin in the cell is concentrated in the cell cortex, the region of the cell just beneath the plasma membrane.
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A(n) ________ mycelium is a branching network of filaments that rises above the agar growth medium.
Fill in the blank(s) with the appropriate word(s).
You turn on the shower and check the water temperature with your hand. Your brain is able to monitor increasing temperature because the thermosensitive neurons in your skin
A. integrate temperature information. B. transmit bigger action potentials to the brain as the water warms up. C. transmit action potentials to different brain regions as the water warms up. D. transmit action potentials at a greater rate when the water warms up. E. gradually adapt to the stimulus.
In humans, germ cells are located in
a)bone marrow. b)blood. c)all cells. d)all tissues. e)testes and ovaries.
In general, the vessels that carry blood away from the heart in a closed circulatory system are referred to as
A. auxiliary hearts. B. capillaries. C. arteries. D. sinuses. E. veins.