Part 3 PDF - Biology Past Paper

71. What is the middle layer of the meninges that resembles a spider web? A. Dura mater​ B. Arachnoid mater​ C. Pia mater​ D. Subarachnoid space Answer: B. Arachnoid mater 72. Which muscles are located on the posterior thigh? A. Quadriceps​ B. Hamstrings​ C. Adductors​ D. Gluteals Answer: B. Ha...

71. What is the middle layer of the meninges that resembles a spider web? A. Dura mater​ B. Arachnoid mater​ C. Pia mater​ D. Subarachnoid space Answer: B. Arachnoid mater 72. Which muscles are located on the posterior thigh? A. Quadriceps​ B. Hamstrings​ C. Adductors​ D. Gluteals Answer: B. Hamstrings 73. What is responsible for muscle relaxation? A. Calcium binding to troponin​ B. Calcium being pumped back into the sarcoplasmic reticulum​ C. Release of acetylcholine​ D. Action potential generation Answer: B. Calcium being pumped back into the sarcoplasmic reticulum 74. What triggers the release of ACh from the prejunctional membrane? A. Calcium influx​ B. Nerve action potential​ C. Muscle contraction​ D. Sodium influx Answer: B. Nerve action potential 75. What is the function of cerebrospinal fluid (CSF)? A. Transmits electrical signals​ B. Cushions the brain, delivers nutrients, and removes waste​ C. Regulates hormone levels​ D. Produces neurotransmitters Answer: B. Cushions the brain, delivers nutrients, and removes waste 76. What best describes a sphincter muscle? A. Encircles an opening​ B. Connects muscle to bone​ C. Aids in chewing​ D. Forms the diaphragm Answer: A. Encircles an opening 77. What is the function of the masseter muscle? A. Chews food​ B. Moves the head​ C. Assists in swallowing​ D. Opens the jaw Answer: A. Chews food 78. What triggers acetylcholine release from neurons? A. Action potential​ B. Potassium influx​ C. Troponin activation​ D. Decreased calcium Answer: A. Action potential 79. What is true of actin and myosin? A. Are components of the nervous system​ B. Are contractile proteins that form cross-bridges and enable sliding filaments​ C. Are structural proteins only​ D. Are stored in the sarcoplasmic reticulum Answer: B. Are contractile proteins that form cross-bridges and enable sliding filaments 80. Which muscles move the arm at the shoulder? A. Hamstrings​ B. Rotator cuff muscles​ C. Quadriceps​ D. Biceps brachii Answer: B. Rotator cuff muscles 81. Where is cerebrospinal fluid formed? A. Subarachnoid space​ B. Ventricles​ C. Choroid plexus​ D. Spinal cord Answer: C. Choroid plexus 82. What is NOT true of the medulla oblongata? A. Controls heart rate and respiratory rate​ B. Regulates blood pressure​ C. Controls executive functions​ D. Connects the brain to the spinal cord Answer: C. Controls executive functions 83. What are the four major brain regions? A. Cerebellum, diencephalon, medulla, and hypothalamus​ B. Cerebrum, diencephalon, brainstem, and cerebellum​ C. Frontal lobe, parietal lobe, occipital lobe, and temporal lobe​ D. Cortex, medulla, thalamus, and hypothalamus Answer: B. Cerebrum, diencephalon, brainstem, and cerebellum 84. What is associated with the parietal lobe? A. Vision processing​ B. Somatosensory area​ C. Auditory processing​ D. Language comprehension Answer: B. Somatosensory area 85. What are the "toe dancer's muscles"? A. Quadriceps and hamstrings​ B. Gastrocnemius and soleus​ C. Peroneus longus and tibialis anterior​ D. Flexor digitorum and extensor digitorum Answer: B. Gastrocnemius and soleus 86. What restores the neuron's internal negativity during an action potential? A. Influx of sodium​ B. Efflux of potassium​ C. Release of neurotransmitters​ D. Calcium binding to troponin Answer: B. Efflux of potassium 87. Where does the pituitary gland sit beneath? A. Thalamus​ B. Cerebrum​ C. Hypothalamus​ D. Cerebellum Answer: C. Hypothalamus 88. What does the orbicularis oculi muscle encircle? A. The mouth​ B. The nose​ C. The eye​ D. The ear Answer: C. The eye 89. What synthesizes myelin in the brain, spinal cord, and peripheral nerves? A. Schwann cells and oligodendrocytes​ B. Astrocytes and ependymal cells​ C. Microglia and macrophages​ D. Neurons and glial cells Answer: A. Schwann cells and oligodendrocytes 90. What is the depression between cerebral convolutions called? A. Gyri​ B. Sulcus​ C. Fissure​ D. Corpus callosum Answer: B. Sulcus 91. What is true of the occipital lobe? A. Contains the primary auditory cortex​ B. Contains the primary visual cortex​ C. Regulates memory and emotions​ D. Processes sensory information from the skin Answer: B. Contains the primary visual cortex 92. Which muscle flattens the cheek? A. Masseter​ B. Buccinator​ C. Frontalis​ D. Temporalis Answer: B. Buccinator 93. What is the chief breathing muscle separating the thoracic and abdominal cavities? A. Intercostal muscles​ B. Pectoralis major​ C. Diaphragm​ D. Rectus abdominis Answer: C. Diaphragm Let me know if there are more questions or edits needed!