BIOS252 Week 5 Exam 2-Chamberlain University
See correct answers immediately with detailed explanations after each question.
Answer all questions, then review your results with feedback at the end.
Timed simulation that mimics real exam conditions. No feedback until completion.
Below are sample questions from this exam to help you understand the content and format.
Q1: What is the term for an elevated ridge on the surface of the cerebrum?
Answer Choices:
✓ A gyrus is an elevated ridge on the surface of the cerebrum that increases the brain’s surface area.
✓ These folds allow for more neurons to be packed into the cortex, enhancing cognitive and sensory processing.
✓ The grooves between gyri are called sulci, and deeper grooves are referred to as fissures.
✓ The meninges are protective coverings of the brain, not structural features of its surface.
✓ Thus, the correct term for an elevated ridge is gyrus, which is critical in the organization of cerebral function.
Q2: Where are the lateral ventricles located in the brain?
Answer Choices:
✨ The lateral ventricles are a pair of C-shaped cavities located within the cerebral hemispheres.
✨ They are filled with cerebrospinal fluid (CSF), which cushions the brain and circulates nutrients.
✨ These ventricles connect to the third ventricle via the interventricular foramina (of Monro).
✨ They are not located in the spinal cord, brainstem, cerebellum, or around the optic chiasm.
✨ Their anatomical location within the cerebral hemispheres makes them key landmarks in neuroimaging and neurosurgery.
Q3: What is the glossopharyngeal nerve responsible for?
Answer Choices:
🔺 The glossopharyngeal nerve (cranial nerve IX) is primarily responsible for swallowing and carrying taste sensations from the posterior one-third of the tongue.
🔺 It also contributes to the gag reflex, salivation from the parotid gland, and monitoring of blood pressure via the carotid sinus.
🔺 It does not control hearing (cranial nerve VIII), smell (cranial nerve I), or vision (cranial nerve II).
🔺 Facial movements are controlled by the facial nerve (cranial nerve VII), not glossopharyngeal.
🔺 This nerve plays a dual role in both sensory and motor functions, making it essential for safe swallowing and taste perception.
Q4: After suffering an ischemic stroke, Cindy finds that she cannot move her left leg. Which area is most likely to have received damage from the stroke?
Answer Choices:
↪ The frontal lobe is responsible for motor control, with the motor cortex controlling opposite (contralateral) body movements.
↪ Since Cindy cannot move her left leg, the lesion must be on the right side of her brain due to crossed motor pathways.
↪ The right frontal lobe, specifically the medial portion of the primary motor cortex, controls voluntary movement of the left leg.
↪ The temporal lobe is more involved with hearing and memory, while the occipital lobe is associated with vision.
↪ The insular lobe is linked with visceral sensation and autonomic function, not limb movement.
Q5: How many pairs of spinal nerves are there in the human spinal cord?
Answer Choices:
🏵️ Humans have 31 pairs of spinal nerves emerging from the spinal cord.
🏵️ These are categorized into 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal pair.
🏵️ Each spinal nerve carries both sensory and motor fibers, making them mixed nerves.
🏵️ The number does not match 30, 40, or 42 because the distribution across vertebral regions adds up precisely to 31.
🏵️ These spinal nerves play a vital role in transmitting information between the central nervous system and the body.
SOCIOLOGY
