The effects of antidiuretic hormone (ADH) are not restricted to regulating water movement; it also affects sodium reabsorption by
A) increasing the synthesis of sodium channels in principal cells.
B) decreasing the synthesis of sodium channels in intercalated cells.
C) increasing the synthesis of Na+/K+ pumps in principal cells. D) decreasing the synthesis of sodium channels in principal cells.
E) increasing the synthesis of sodium channels in intercalated cells.
Ans: A) increasing the synthesis of sodium channels in principal cells.
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The basin in the floor of the cranium that accommodates the temporal lobe of the brain is the
A. cribriform fissure. B. inferior cortical plate. C. middle cranial fossa. D. sella turcica. E. posterior cranial fossa.
Compare lymphatic capillaries in the small intestine with those found elsewhere
A) Lymphatic capillaries in the small intestine are called mucosa-associated lymphoid tissue and they contain dividing lymphocytes. Lymphatic capillaries elsewhere house mature, non-dividing, lymphocytes. B) Lymphatic capillaries in the small intestine are called lymph corpuscles and they are involved in the immune response of the body. Lymphatic capillaries elsewhere are not involved in the immune response of the body. C) Lymphatic capillaries in the small intestine are called lymph corpuscles and they are not involved in the immune response of the body. Lymphatic capillaries elsewhere are involved in the immune response of the body. D) Lymphatic capillaries in the small intestine also absorb nutrients to deliver to the hepatic portal vein and are critical components of the hepatic portal system. Lymphatic capillaries elsewhere do not carry any nutrients in the lymph. E) Lymphatic capillaries in the small intestine are called lacteals and they transport lipids. Lymphatic capillaries elsewhere are associated with blood capillary networks.
Which statement accurately describes the effects of substrate and enzyme concentrations on reaction rate?
A. An increase in either substrate or enzyme concentration will increase the reaction rate. B. An increase in either substrate or enzyme concentration will decrease the reaction rate. C. An increase in substrate concentration increases the reaction rate, but enzyme concentration has no effect. D. A decrease in substrate concentration or an increase in enzyme concentration increases the reaction rate. E. An increase in substrate concentration or a decrease in enzyme concentration will increase the reaction rate.
In adults, changes in the mixtures of hormones reaching the CNS can have significant effects on __________.
a. intellectual capabilities b. emotional states c. memory and learning d. all of the listed responses are correct