What are epidermal derivatives?
A) Epidermal derivatives are pigment molecules produced by the epidermis, including carotene and melanin.
B) Epidermal derivatives are the different cell types found in the epidermis, including epithelial cells and melanocytes.
C) Epidermal derivatives are chemicals produced by the epidermis, such as heparin and prostaglandins.
D) Epidermal derivatives are secretions produced by the epidermis, including sweat and sebum.
E) Epidermal derivatives are accessory structures that originate from the epidermis during embryonic development, including hair follicles, sebaceous and sweat glands, and nails.
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The equilibrium potential of sodium is
A) -90mV. B) -65mV. C) -70mV. D) +30mV. E) +66mV.
The lining of the trachea in the respiratory system is an example of ___ epithelial tissue.
a) simple columnar b) stratified squamous c) simple squamous d) pseudostratified columnar e) simple cuboidal
The chloride shift refers to the
A. effect of chloride ions on the oxygen dissociation curve. B. exchange of chloride ions for bicarbonate ions across the red blood cell membrane. C. exchange of chloride ions for carbon dioxide across alveolar cell membranes. D. effect of chloride ions on hydrogen ion diffusion from red blood cells. E. exchange of chloride ions for hemoglobin across the RBC membrane.
The portion of the GI tract seen curving around the head of the pancreas on axial CT images is the jejunum.
Answer the following statement true (T) or false (F)