What structure bears the most weight when we sit?
A. Obturator foramen
B. Pubic symphysis
C. Ischial tuberosity
D. Ischial spine
E. Iliac crest
Answer: C
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What is the most common inhibitory neurotransmitter in the brain?
A. Noradrenaline B. Norepinephrine C. Epinephrine D. Acetylcholine E. Gamma-aminobutyric acid
The motor portion of the autonomic nervous system can be divided into
a) somatic and sympathetic divisions. b) somatic and parasympathetic divisions. c) enteric and somatic divisions. d) sympathetic and parasympathetic divisions. e) voluntary and involuntary divisions.
Hematocrit is
A. a disease. B. a clotting factor. C. the percent of red blood cells in a blood sample. D. the color of plasma.
Which of the following describes a mechanism that brings the internal environment back to normal?
A) integration B) regulation C) positive feedback D) negative feedback E) homeostasis