Exam 2 Anatomy

• The depression on the posterior part of the knee joint is called the _____ fossa

  Popliteal
• The pyloric sphincter is located between the stomach and beginning of the small intestine. Which of the following would describe the structure of this muscle?

  muscle fibers concentrically arranged
• Which protein makes up the thick filaments?

  Myosin
• Which is the correct order of the connective tissue layers of a skeletal muscle, beginning with the most superficial?a: Endomysiumb: Epimysiumc: Perimysium

  b, c, a
• Your favorite niece just gave you a kiss. What muscle did she use?

  Orbicularis oris
• A nursing baby is using what muscle?

  Buccinator
• Which extrinsic eye muscle moves through a pulley-like loop?


  superior oblique
• The pronator teres and pronator quadratus cause pronation of the forearm. What muscle opposes this movement?

  supinator
• The triangle of auscultation is bounded by the rhomboid major, the trapezius, and the

  latissimus dorsi
• Which is the structure easily palpated along the posterior aspect of the elbow?


  Olecranon of the ulna
• The bony part that helps form the rounded projection of the shoulder is the

  Acromion of the scapula
• Glial cells differ from neurons in that they

  Are smaller and capable of mitosis
• The glossy white appearance of most axons is due to

  The high lipid content of the myelin sheath
• Which is true regarding the action of a neurolemmocyte?

  Each neurolemmocyte can wrap only a 1mm portion of a single axon
• Cerebrospinal fluid is formed by the

  Choroid plexus
• The horizontally oriented fold of dura mater that separates the occipital and temporal lobes of the cerebrum from the cerebellum is the

  Tentorium cerebelli
• The blood-brain barrier is made up of

  Astrocyte perivascular feet and capillary endothelial cells
• There are _____ pairs of spinal nerves

  31
• A network of interwoven anterior rami of spinal nerves is a

  plexus
• If a person suffers a thorax-crushing injury and is unable to breathe properly, you would suspect that this nerve was damaged

  phrenic nerve
• A tract is a 


  group of axons that travel together in the CNS
• The pair of thick anterior bulges (pyramids) in the medulla oblongata are formed by the

  corticospinal tracts
• Which general pathway conduct information “telling” the brain the exact position of the upper limb?

  sensory pathways
• The preganglionic sympathetic neuron cell bodies are housed in the

  lateral horns of the T1-T12 segments of the spinal cord
• The centers for cardiac, digestive, and vasomotor functions are housed within the

  brainstem
• What type of muscle is not an effector innervated by the autonomic nervous system?

  skeletal muscle
• In a sarcomere, which component appears as a thin dark line in the middle of the I band?

  Z disc
• The type of muscle fibers that have only a single nucleus, both thick and thin filaments, but no Z discs are

  smooth
• Which incorrectly describes what happens during skeletal muscle contraction?

  The Z discs of a sarcomere move farther apart
• What are the four muscles of mastication?

  Masseter, temporalis, medial pterygoid, lateral pterygoid.
• The deepest of the abdominal muscles are the ______

  transversus abdominus
• The frontal belly of the occipitofrontalis muscle causes what action?

  Wrinkles the brow
• Besides the supinator, which other muscle is a powerful supinator of the forearm?

  biceps brachii
• Which muscle does not adduct the thigh?

  tensor fasciae latae
• Rhythmic oscillations between flexion and extension when the muscle reflex is tested is called

  clonus
• Lesser and least thoracic splanchnic nerves terminate at the

  superior mesenteric ganglion
• If digestion is stimulated when an individual is at rest, which ANS division is likely responsible for this simulation?

  parasympathetic
• If a sensory's receptors receptive field is _____, it allows for great specificity of localization.

  small
• The nerve for olfaction is

  CN I
• Why does a detached retina lead to blindness?

  The neural layer of the retina has no blood supply