The membranes of the blood-brain barrier need to be fused, preventing any substances from entering and/or escaping between cells. The type of intercellular junction best suited for this need is a ________.
A. gap junction
B. desmosome
C. tight junction
D. ion channel
Answer: C
You might also like to view...
Stretch of the uterus causes the posterior lobe of the pituitary to release
A) oxytocin (OT). B) antidiuretic hormone (ADH). C) luteinizing hormone (LH). D) growth hormone (GH). E) adrenocorticotropic hormone (ACTH).
A red blood cell that is flowing through the aorta would pass through ________ heart valves before reaching the right ventricle.
A. one B. two C. three D. four
Which of the following organs secretes digestive enzymes to chemically break down food?
A. The pharynx B. The stomach C. The esophagus D. The large intestine E. None of these organs secretes digestive enzymes.
Choose all that occur during ventricular systole.
a. The AV valves open to allow blood to enter the ventricles from the atria. b. The semilunar valves remain closed throughout systole to prevent backflow of blood into the ventricles. c. The semilunar valves open to allow blood to flow into the large arteries. d. The AV valves close to prevent backflow of blood into the atria.