How are the processes of reabsorption and secretion related?
A. They both involve movement of material from the blood into the tubular fluid.
B. Materials move in opposite directions: reabsorption moves materials into the blood, whereas secretion removes them from the blood.
C. Materials move in opposite directions: secretion moves materials into the blood, whereas reabsorption removes them from the blood.
D. They both involve movement of material from the tubular fluid into the blood.
B
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There are two types of synapses, based on mode of communication. What are they?
A. Mechanical and electrical B. Mechanical and chemical C. Physical and chemical D. Magnetic and physical E. Chemical and electrical
The part of the brain that has hunger, satiety, and sleep centers; affects activities of the ANS; and plays a role in emotional responses such as rage, pain, and pleasure is the
A) medulla. B) pons. C) midbrain. D) epithalamus. E) hypothalamus.
The mass number represents the number of
A) protons in an atom. B) electrons in an ion. C) neutrons in an atom. D) protons + neutrons. E) neutrons + electrons.
Renin has its direct effect on a molecule known as
A. angiotensinogen. B. vasopressin. C. aldosterone. D. angiotensin II.