The chemoreceptor reflexes help maintain homeostasis
A. under normal conditions.
B. when carbon dioxide levels increase.
C. when stimulated by changes in blood osmotic pressure.
D. when epinephrine levels increase.
E. when hydrogen ion concentrations decrease.
B
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An ectopic pacemaker is an area of the myocardial conducting system, other than the atrioventricular node, that initiates cardiac depolarization.
Answer the following statement true (T) or false (F)
Spongy bone is made up of a network of bony rods or plates called
A) trabeculae. B) osteons. C) lamellae. D) canaliculi. E) perforating canals.
Visceral reflex arcs differ from somatic in that ________
A) visceral arcs contain two sensory neurons B) somatic arcs contain one additional component that visceral arcs do not possess C) visceral arcs do not use integration centers D) visceral arcs involve two motor neurons
Tay-Sachs is a disease caused by having ineffective
A) Golgi bodies. B) lysosomes. C) mitochondria. D) rough endoplasmic reticulum. E) smooth endoplasmic reticulum.