The layer directly under the skin is called the ________.
A. epidermis
B. dermis
C. hyperdermis
D. subcutaneous tissue
Answer: D
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The blood testis barrier is to newly formed sperm cells as the blood thymus barrier is to ________
A) plasma cells B) white pulp C) T lymphocyte precursors D) mast cells
Peripheral chemoreceptors
A. are located in the aortic and carotid bodies. B. are not sensitive to changes in pH of the blood. C. are not sensitive to CO2 or H+ levels. D. are sensitive to small changes in O2 levels in the blood. E. monitor blood pressure.
What is the path of blood from the heart, to the left zygomaticus muscles, and back to the heart?
A. Aorta ? left common carotid artery ? left external carotid artery ? left facial artery ? zygomatic tissues ? left facial vein ? left internal jugular vein ? left subclavian vein ? left brachiocephalic vein ? superior vena cava B. Aorta ? left brachiocephalic artery ? left common carotid artery ? left internal carotid artery ? left occipital artery ? zygomatic tissues ? left maxillary vein ? left internal jugular vein ? left subclavian vein ? left brachiocephalic vein ? superior vena cava C. Aorta ? left brachiocephalic artery ? left common carotid artery ? left external carotid artery ? left facial artery ? zygomatic tissues ? left facial vein ? left internal jugular vein ? left subclavian vein ? superior vena cava D. Aorta ? left common carotid artery ? left internal carotid artery ? left maxillary artery ? zygomatic tissues ? left facial vein ? left external jugular vein ? left subclavian vein ? left brachiocephalic vein ? superior vena cava
Fibroblasts and protein fibers are associated with both ________ and ________.
A. elastic cartilage; hyaline cartilage B. plasma; formed elements C. adipose tissue; reticular tissue D. dense regular; dense irregular connective tissues E. spongy bone; compact (dense) bone