Biology Past Paper PDF

41. Which of the following does NOT refer to the thin filament? A. Actin​ B. Tropomyosin​ C. Troponin​ D. Myosin Answer: D. Myosin 42. What is true of chewing muscles? A. They attach to the maxilla​ B. They must attach to the mandible​ C. They only move the tongue​ D. They are smooth muscles An...

41. Which of the following does NOT refer to the thin filament? A. Actin​ B. Tropomyosin​ C. Troponin​ D. Myosin Answer: D. Myosin 42. What is true of chewing muscles? A. They attach to the maxilla​ B. They must attach to the mandible​ C. They only move the tongue​ D. They are smooth muscles Answer: B. They must attach to the mandible 43. What is true of the diencephalon? A. Contains the medulla and pons​ B. Contains the thalamus and hypothalamus​ C. Regulates reflexes and coordination​ D. Contains the cerebellum Answer: B. Contains the thalamus and hypothalamus 44. What is true of cerebrospinal fluid (CSF)? A. Found only in the brain ventricles​ B. Circulates within the subarachnoid space​ C. Does not provide any protective function​ D. Found in the bloodstream Answer: B. Circulates within the subarachnoid space 45. Which type of muscle requires stimulation by a somatic motor neuron? A. Smooth muscle​ B. Skeletal muscle​ C. Cardiac muscle​ D. Involuntary muscle Answer: B. Skeletal muscle 46. What is true of the occipital lobe? A. Contains the primary auditory cortex​ B. Processes visual information in the primary visual cortex​ C. Regulates speech and language​ D. Is part of the cerebellum Answer: B. Processes visual information in the primary visual cortex 47. What is true of the temporal lobe? A. Processes sensory input from the skin​ B. Contains the primary auditory cortex​ C. Is responsible for voluntary movement​ D. Contains the visual processing center Answer: B. Contains the primary auditory cortex 48. What is the fatty insulating material surrounding axons? A. Actin​ B. Myelin​ C. Collagen​ D. Elastin Answer: B. Myelin 49. What does the medulla oblongata become as it descends? A. Cerebellum​ B. Pons​ C. Spinal cord​ D. Corpus callosum Answer: C. Spinal cord 50. CSF circulates through all structures EXCEPT? A. Ventricles​ B. Subarachnoid space​ C. Central canal​ D. Foramen magnum Answer: D. Foramen magnum 51. What best describes the arachnoid mater? A. Tough outer layer of the meninges​ B. A meninge resembling a spider web​ C. Vascular layer supplying blood to the brain​ D. Protective barrier against infections Answer: B. A meninge resembling a spider web 52. What does myelination do? A. Inhibits nerve impulses along the axon​ B. Increases the speed of action potential along the axon​ C. Enhances neurotransmitter release​ D. Protects the soma from injury Answer: B. Increases the speed of action potential along the axon 53. What is the first phase of the action potential caused by the inward movement of sodium? A. Hyperpolarization​ B. Repolarization​ C. Depolarization​ D. Resting potential Answer: C. Depolarization 54. What muscles are located between the ribs to aid breathing? A. Intercostal muscles​ B. Diaphragm​ C. Rectus abdominis​ D. Serratus anterior Answer: A. Intercostal muscles 55. Which muscle is located in the lower extremities? A. Trapezius​ B. Latissimus dorsi​ C. Peroneus longus​ D. Pectoralis major Answer: C. Peroneus longus 56. What is true of the hypothalamus? A. Controls the pituitary gland, regulates body temperature, and secretes releasing hormones​ B. Integrates visual and auditory information​ C. Connects the brain to the spinal cord​ D. Controls voluntary motor functions Answer: A. Controls the pituitary gland, regulates body temperature, and secretes releasing hormones 57. What is actin? A. A contractile protein in the thick filament​ B. A component of myelin​ C. A contractile protein in the thin filament​ D. A neurotransmitter Answer: C. A contractile protein in the thin filament 58. What do the occipital and temporal lobes have in common? A. Both regulate voluntary movement​ B. Both process sensory input from the skin​ C. Both are cerebral lobes​ D. Both control balance and coordination Answer: C. Both are cerebral lobes 59. What contractile protein does calcium bind to? A. Myosin​ B. Troponin​ C. Tropomyosin​ D. Actin Answer: B. Troponin 60. What is located within the subarachnoid space? A. Blood vessels​ B. Nerves​ C. Cerebrospinal fluid​ D. Axons Answer: C. Cerebrospinal fluid Let me know when you're ready to process the next set!