The structure of a capillary wall differs from that of a vein or artery because
A. the capillary wall has only two tunics.
B. capillaries have more smooth muscle.
C. capillary walls have only endothelium and a basement membrane.
D. capillaries can constrict or dilate.
E. capillaries are impermeable to all substances.
C
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The following is a list of the blood vessels that carry blood to the kidney. In what order does blood pass through these vessels starting at the renal artery? 1. afferent arteriole 2. arcuate artery 3. interlobar artery 4. segmental artery 5. glomerulus 6. cortical radiate artery 7. efferent arteriole 8. peritubular capillary
A) 4, 6, 2, 3, 1, 5, 7, 8 B) 4, 3, 2, 6, 1, 5, 7, 8 C) 4, 3, 2, 6, 7, 5, 1, 8 D) 4, 6, 2, 3, 7, 5, 1, 8 E) 4, 3, 6, 2, 1, 5, 7, 8
A high percentage of sodium and potassium ions move during each action potential
Indicate whether the statement is true or false
Flexors increase the angle at a joint.
Answer the following statement true (T) or false (F)
What is true of the autonomic nervous system that makes it different from the somatic nervous system?
A) Axons go directly from the CNS to the effector organ. B) Motor neurons are located in the ventral horns of the spinal cord. C) There is a two-neuron chain from the CNS to the effector organ. D) All the motor neurons are located within the CNS.