Membranes that line cavities and tubes in the digestive and respiratory systems are classified as ____
a. serous
b. cutaneous
c. mucous
d. synovial
e. visceral
ANSWER: c
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A contraceptive pill that continuously inhibits the release of gonadotropin-releasing hormone (GnRH) from the hypothalamus will _____
A) increase the production of estrogen and progesterone by the ovaries B) initiate ovulation C) reduce the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the anterior pituitary gland D) stimulate the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) from the posterior pituitary gland E) increase the flow phase of the menstrual cycle
In cardiovascular disease, "MI" refers to
A. high blood cholesterol. B. a heart attack. C. a stroke. D. narrowed arteries.
The human body's arterial blood pH is tightly maintained around 7.4 by buffering agents that bind hydrogen ions to stop any change in pH. If an acid-base imbalance overcomes the buffer system, the body changes the ventilation rate, or the rate at which gas enters or leaves the lungs. Changing the ventilation rate changes the concentration of CO2 in the blood, which alters the pH of the blood. In this case, the muscles that control the ventilation rate are acting as the:
A. homeostatic challenge. B. effector. C. sensor. D. set point. E. integrator.
Which of the following refers to the area of Earth's surface that is required to sustainably support a particular level of development and consumption?
A. Demographic transition model B. Carrying capacity C. Ecological footprint D. Biosphere E. Ecological cohort