Which statement about gap junctions is incorrect?
a. They consist of protein.
b. They are anchored to plaques on the inside surface of the plasma membrane.
c. They allow materials to pass from one cell into an adjacent cell.
d. They play a role in transmitting electrical activity through the heart.
e. They consist of connexons.
B
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Fluid consumption is influenced by other factors in addition to the thirst mechanism involving osmoreceptors
Indicate whether the statement is true or false
Which of these has the highest H+ concentration?
A) Saliva, pH = 6.6 B) Tomato juice, pH = 4.7 C) Red wine, pH = 3.2 D) Household ammonia, pH = 10.8 E) Lemon juice, pH = 2.3
What is the function of the tunica externa?
A. Anchors the vessel to surrounding tissue B. Secretes a chemical to repel platelets so blood can easily flow through the vessel C. Contracts to move the blood through the vessel D. None of these are correct.
What is the most common site of herniated discs?
A. Between the atlas and the axis B. The thoracic region C. Between T12 and L1 D. Between L4 and L5 or L5 and S1 E. The coccyx