If an atom has 8 protons and 8 neutrons in its nucleus, and 8 orbiting electrons, its atomic number would be ________.
A. 8
B. 16
C. 12
D. 24
Answer: A
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Where is the pituitary gland located?
A. Within the sella turcica of the sphenoid bone B. Between the cerebrum and cerebellum, inferior to the occipital lobe C. On the posterior surface of the thyroid gland D. On the tracheal surface, inferior to the larynx E. Within the third ventricle of the brain
How does aging affect the endocrine system?
A. Secretory activity of endocrine glands decreases. B. Normal levels of hormones, particularly growth hormone and sex hormones, often decrease. C. Aging reduces the efficiency of endocrine system functions. D. Endocrine system imbalances can lead to weight gain or muscle loss. E. All of the choices are correct.
Compensation for decreased blood volume includes increases in
A) sympathetic stimulation to blood vessels and water conservation by the kidneys. B) sympathetic stimulation of the heart. C) sympathetic stimulation to blood vessels. D) sympathetic stimulation to blood vessels, sympathetic stimulation of the heart, and water conservation by the kidneys. E) water conservation by the kidneys.
The white pulp of the spleen contains large numbers of
A) red blood cells and platelets as well as vast stores of iron. B) lymphocytes, which initiate immune responses. C) eosinophils, which engage in immune surveillance. D) lymphocytes, which act as stationary phagocytes. E) antibodies that remain in reserve for the next antigen encounter.