Part 1 PDF - Biology Past Paper

21. Which space contains cerebrospinal fluid? A. Epidural space​ B. Subarachnoid space​ C. Subdural space​ D. Peritoneal cavity Answer: B. Subarachnoid space 22. What does the corpus callosum do? A. Connects the cerebellum to the spinal cord​ B. Links the frontal and occipital lobes​ C. Connects...

21. Which space contains cerebrospinal fluid? A. Epidural space​ B. Subarachnoid space​ C. Subdural space​ D. Peritoneal cavity Answer: B. Subarachnoid space 22. What does the corpus callosum do? A. Connects the cerebellum to the spinal cord​ B. Links the frontal and occipital lobes​ C. Connects the right and left cerebral hemispheres​ D. Integrates sensory and motor pathways Answer: C. Connects the right and left cerebral hemispheres 23. What muscle is known as the "smiling muscle"? A. Orbicularis oris​ B. Zygomaticus​ C. Masseter​ D. Buccinator Answer: B. Zygomaticus 24. Through which structure does the medulla oblongata descend into the vertebral cavity? A. Intervertebral disc​ B. Vertebral foramen​ C. Foramen magnum​ D. Central canal Answer: C. Foramen magnum 25. What type of nervous tissue conducts a nerve impulse? A. Glial cell​ B. Axon​ C. Neuron​ D. Dendrite Answer: C. Neuron 26. What does the somatic motor neuron release into the neuromuscular junction? A. Dopamine​ B. Serotonin​ C. Acetylcholine (ACh)​ D. Calcium Answer: C. Acetylcholine (ACh) 27. Where must the muscles involved in mastication insert? A. Maxilla​ B. Mandible​ C. Zygomatic bone​ D. Frontal bone Answer: B. Mandible 28. Which of the following is true of the medulla oblongata? A. It regulates voluntary movement​ B. It is an infratentorial structure sensitive to opioids​ C. It processes vision and hearing​ D. It is part of the diencephalon Answer: B. It is an infratentorial structure sensitive to opioids 29. What are the meninges? A. Protective layers around the brain and spinal cord​ B. Blood vessels supplying the brain​ C. Layers of muscle protecting the brain​ D. Nerves connecting the brain to the spinal cord Answer: A. Protective layers around the brain and spinal cord 30. What muscle separates the thoracic and abdominal cavities and is the chief breathing muscle? A. Rectus abdominis​ B. Intercostal muscles​ C. Diaphragm​ D. Serratus anterior Answer: C. Diaphragm 31. What makes white matter white? A. Axon terminals​ B. Dendrites​ C. Myelin​ D. Neurotransmitters Answer: C. Myelin 32. What stores neurotransmitters within a neuron? A. Soma​ B. Dendrites​ C. Axon terminals​ D. Nucleus Answer: C. Axon terminals 33. What muscle raises the eyelids? A. Orbicularis oculi​ B. Levator palpebrae superioris​ C. Frontalis​ D. Zygomaticus Answer: B. Levator palpebrae superioris 34. What does the term "myasthenia" mean? A. Muscle pain​ B. Muscle weakness​ C. Muscle stiffness​ D. Muscle inflammation Answer: B. Muscle weakness 35. Which muscle type is striated and involuntary? A. Skeletal muscle​ B. Cardiac muscle​ C. Smooth muscle​ D. Visceral muscle Answer: B. Cardiac muscle 36. Which muscles flex the forearm at the elbow? A. Triceps brachii and brachialis​ B. Biceps brachii and deltoid​ C. Brachialis and brachioradialis​ D. Triceps brachii and biceps brachii Answer: C. Brachialis and brachioradialis 37. What are the muscles of the quadriceps femoris group? A. Rectus femoris, biceps femoris, semitendinosus, semimembranosus​ B. Vastus lateralis, vastus medialis, vastus intermedius, rectus femoris​ C. Sartorius, gracilis, adductor longus, adductor magnus​ D. Tensor fasciae latae, gluteus maximus, gluteus medius, gluteus minimus Answer: B. Vastus lateralis, vastus medialis, vastus intermedius, rectus femoris 38. What protein forms cross-bridges with actin? A. Myosin​ B. Tropomyosin​ C. Troponin​ D. Collagen Answer: A. Myosin 39. What structure connects muscle to bone? A. Ligament​ B. Tendon​ C. Cartilage​ D. Aponeurosis Answer: B. Tendon 40. What does the efflux of K+ (potassium) during an action potential cause? A. Depolarization​ B. Repolarization​ C. Hyperpolarization​ D. Excitation Answer: B. Repolarization Would you like me to process more questions or adjust anything in the formatting?