The plasma membrane is selectively permeable. This means
A. substances need permission to pass through it.
B. ATP is always needed to move molecules across the plasma membrane.
C. substances need carrier molecules to pass through it.
D. only gases and water can pass through it.
E. only certain substances can pass through it.
E
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In the fetal circulation, blood from the ________ flows directly into the descending aorta.
A. ligamentum arteriosum B. ductus arteriosus C. foramen ovale D. ductus venosus
The ________ ear collects sounds waves and transmits them to the ________ ear, which contains auditory ossicles
A) inner; middle B) outer; middle C) outer; inner D) middle; inner E) superficial; deep
Where would be the most likely location for damage to the spinal cord of a person who has become a paraplegic?
What will be an ideal response?
Which of the following is an extension of the pia mater?
a. denticulate ligaments b. filium terminal c. spinal roots d. a and b