Parasympathetic preganglionic fibers leave the CNS in all of the following locations except
A) the midbrain.
B) the pons.
C) the medulla oblongata.
D) spinal segments T1-L2.
E) spinal segments S2-S4.
D
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Indicate whether this statement is true or false.
Answer the following statements true (T) or false (F)
1. The synaptic knob is on the postsynaptic neuron. 2. The synaptic knob contains and releases neurotransmitters. 3. Neurotransmitter receptors are located on the presynaptic neuron. 4. Neurotransmitter activity is terminated when it is transported back into the synaptic knob. 5. Acetylcholine is an example of a catecholamine.
Which statement about anatomy and physiology is true?
A) Physiology is the study of structure. B) Anatomy is the study of structure and function. C) Both anatomy and physiology are needed to understand organ systems and organisms. D) There is only one area of anatomy, whereas there are many subdivisions of physiology. E) Special physiology focuses on a particular organ system.
Plasma accounts for ________ of total blood volume.
A. 75% B. 50% C. 55% D. 90%