Which of the following does NOT influence the time necessary for a nerve impulse to be conveyed by a particular neuron?
A) presence or absence of a myelin sheath
B) diameter of the axon
C) presence or absence of nodes of Ranvier
D) whether axon is sensory or motor
E) length of the axon
D) whether axon is sensory or motor
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The white matter of the brain derives its color from myelin.
Answer the following statement true (T) or false (F)
When blood pressure increases
a. baroreceptors detect the change in the carotid arteries. b. the cardioregulatory center decreases parasympathetic stimulation of the heart. c. heart rate and stroke volume increase. d. norepinephrine secretion increases.
Identify the fates of fatty acids
A) Fatty acids may become a fuel source or a component of glycogen, glucose, and glycolipids. B) Fatty acids may become LDLs, HDLs, or VLDLs. C) Fatty acids may directly enter glycolysis, citric acid cycle, and the electron transport chain to generate ATP. D) Fatty acids may become a fuel source or a component of proteins and nucleic acids. E) Fatty acids may become a fuel source or a component of triglycerides, glycolipids, phospholipids, prostaglandins, cholesterol, and steroids.
Endocrine glands empty their products into ________ and are referred to as ________ glands, while exocrine gland secretions empty into ________ or onto surfaces
A) cells; cellular; interstitial fluid B) interstitial fluid; ducted; cells C) interstitial fluid; ducted; interstitial fluid D) interstitial fluid; ductless; ducts E) ducts; ducted; interstitial fluid