Cell membranes are said to be ________ because they allow some substances to pass but not others.

Fill in the blank(s) with the appropriate word(s).


selectively permeable

Anatomy & Physiology

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Formation of membrane attack complex is associated with:

1.antibody production. 2.fever. 3.activation of complement system. 4.macrophage function.

Anatomy & Physiology

Bones are somewhat flexible due to ________

A) elastic fibers in the matrix B) soft, pliable ground substance of the matrix C) calcium salts in the ground substance D) collagen fibers in the matrix

Anatomy & Physiology

Identical twins who __________ provide researchers with valuable information on the "nature-nurture question".

a. like the same things b. grow up in the same place c. were separated at birth d. have different math aptitudes

Anatomy & Physiology

Cancer cells:

A) may exhibit metastasis.
B) have a slower mitotic rate than normal body cells.
C) are indistinguishable from normal body cells.
D) do not spread into other body tissues.

Anatomy & Physiology