Intermediate Basivertebral Veins Quiz

Q1. How do basivertebral veins connect the interior of a vertebral body with the vertebral canal?

• They drain posteriorly into the internal vertebral venous plexus
• They terminate blindly within bone
• They pass through the intervertebral disc into the aorta
• They empty into the spinal cord central canal

Q2. Which feature of the vertebral venous system permits changes in direction of blood flow?

• Isolation from systemic veins
• Rigid fixation to vertebral periosteum
• Absence of venous valves
• Presence of semilunar arterial valves

Q3. What is the relationship between basivertebral veins and the external vertebral venous plexuses?

• They participate in communicating venous channels linking internal and external vertebral drainage
• They drain only into cerebral veins
• They are lymphatic tributaries of external plexuses
• They are completely isolated from external vertebral veins

Q4. Which venous plexus is located inside the vertebral canal but outside the dura mater?

• External vertebral venous plexus
• Internal vertebral venous plexus
• Pulmonary venous plexus
• Pampiniform plexus

Q5. Why can increases in thoracic or abdominal pressure alter flow through vertebral veins?

• Pressure gradients can redirect blood through valveless venous channels
• Vertebral veins are rigid arteries
• Basivertebral veins contain one-way lymphatic valves
• All vertebral veins close during abdominal pressure increases

Q6. Which systemic veins receive blood indirectly from the vertebral venous plexuses through segmental connections?

• Segmental veins such as intercostal and lumbar veins
• Hepatic portal branches only
• Pulmonary veins only
• Coronary arteries

Q7. What anatomical feature allows basivertebral veins to drain marrow from deep within vertebral bodies?

• They enter through the spinal cord
• They are confined to compact cortical bone
• Channels within cancellous bone converge into larger basivertebral veins
• They arise inside intervertebral discs

Q8. Which structure separates the internal vertebral venous plexus from the spinal subarachnoid space?

• Vertebral marrow only
• Dura mater and arachnoid mater
• Pia mater only
• Nucleus pulposus

Q9. Why can vertebral metastases have a venous anatomical basis?

• Valveless venous communications can carry tumor cells to vertebral marrow
• Basivertebral veins are isolated from systemic circulation
• Tumor cells travel only through CSF
• Vertebral bodies have no arterial supply

Q10. What is the most direct functional role of basivertebral veins?

• CSF absorption from the lumbar cistern
• Drainage of vertebral bodies into vertebral venous networks
• Arterial supply of the spinal cord
• Motor innervation of paraspinal muscles