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Eleventh Grade (Grade 11) Science Questions

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Grade 11 Zoology
Which is a color not found on the Navanax?
  1. pink
  2. blue
  3. yellow
  4. orange
Grade 11 Skin, Skeleton, and Muscles
Which muscle is located in the anterior superficial musculature? Select all that apply.
  1. platysma
  2. pectoralis major
  3. biceps brachii
  4. flexor carpi radialis
Grade 11 Nervous and Endocrine Systems
How many parts does the adrenal gland have?
  1. four
  2. three
  3. two
  4. one
Grade 11 Oceanography and Hydrology
About how deep is the continental slope?
  1. 0 - 500 ft.
  2. 330 - 10,500 ft.
  3. 10,500+ ft.
Grade 11 Oceanography and Hydrology
Wide, sandy beaches are the result of loose sediments carried                       the shore by waves.
  1. onto
  2. away from
  3. out to sea from
  4. to the headlands from
Grade 11 Skin, Skeleton, and Muscles
During any isometric twitch in a skeletal muscle,
  1. tension exceeds load.
  2. tetanus occurs.
  3. load exceeds tension.
  4. the whole muscle shortens.
Grade 11 Skin, Skeleton, and Muscles
Which statement is not true regarding the comparison of type I (slow oxidative) and type II b (fast glycolytic) skeletal muscle fibers? Select all that apply.
  1. Type I fibers have more abundant mitochondria.
  2. Type I fibers fatigue more readily.
  3. Type I fibers have more abundant myoglobin.
  4. Type I fibers have more abundant capillaries.
  5. Type I motor units contain fewer fibers than type II b motor units.
Grade 11 Skin, Skeleton, and Muscles
Which description applies to curare?
  1. is an autoimmune disease
  2. blocks acetylcholinesterase
  3. is a muscarinic acetylcholine antagonist
  4. is a nicotinic acetylcholine antagonist
  5. blocks acetylcholinesterase and is a muscarinic acetylcholine antagonist
Grade 11 Skin, Skeleton, and Muscles
Which statement regarding the motor end plate of a skeletal muscle fiber is true?
  1. Muscarinic receptors in the end plate are activated by binding to acetylcholine.
  2. Temporal summation of end plate potentials is required to trigger an action potential in the muscle-fiber membrane
  3. Acetylcholinesterase in the end plate membrane catalyzes the breakdown of acetylcholine.
  4. Sympathetic nerve fibers innervate skeletal muscle.
Grade 11 Skin, Skeleton, and Muscles
Which statement regarding the shortening of a skeletal muscle fiber is not true? Select all that apply.
  1. Sarcomeres shorten.
  2. The distance between Z lines decreases.
  3. Myofilaments shorten.
  4. Myofilaments slide past each other.
  5. The length of the A bands remains the same.
Grade 11 Skin, Skeleton, and Muscles
During isotonic contraction of a skeletal muscle fiber
  1. the sarcomeres shorten.
  2. the A bands shorten.
  3. the I bands shorten.
  4. the sarcomeres and I bands shorten.
  5. the A bands and I bands shorten.
  6. no movement is present.
Grade 11 Skin, Skeleton, and Muscles
Ligaments tightly bind the scapula to hold it in place.
  1. True
  2. False
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