The large, negatively charged intracellular proteins (A-) cannot permeate the cell membrane because
a. they are greater than 0.8 nm in diameter and are not lipid soluble.
b. there are no carriers for them.
c. no concentration or electrical gradient exists for them.
d. two of these answers.
e. all of these answers.
D
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Histology is the study of
A) organ function. B) cells. C) molecules. D) tissues.
A feature unique to keratinocytes in the stratum corneum is that cells in this location:
a. Contain basophilic keratohyaline granules b. Have a short half-life and rapidly undergo mitosis to form new cells c. Have large numbers of mitochondria d. Lack discrete nuclei e. Possess large numbers of desmosomes
The lower part of the large intestine including the rectum receives blood from the ________ artery
A) adrenal B) inferior mesenteric C) superior mesenteric D) celiac E) common iliac
Which of the following is not found in the epidermis?
A. Stem cells B. Melanocytes C. Keratinocytes D. Tactile cells E. Fibroblasts