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Eleventh Grade (Grade 11) Biology Questions

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Grade 11 Nervous and Endocrine Systems
The                       helps us avoid painful stimuli.
  1. knee jerk reflex
  2. hand jerk reflex
  3. withdrawal reflex
  4. pull away fast reflex
Grade 11 Skin, Skeleton, and Muscles
What is the underlying layer in the hair shaft?
  1. hair shaft
  2. medulla
  3. cortex
  4. arrector pili
Grade 11 Skin, Skeleton, and Muscles
The thickened area of scar tissue is called a
  1. scar.
  2. scab.
  3. keloid.
  4. granulation tissue.
Grade 11 Skin, Skeleton, and Muscles
What do the parietal bones form?
  1. upper jaw
  2. crown and upper sides of the head
  3. bridge of the nose
  4. cheek
Grade 11 Skin, Skeleton, and Muscles
The                 provides strength and makes up most of the hair mass.
  1. cuticle
  2. medulla
  3. cortex
  4. keratin
Grade 11 Skin, Skeleton, and Muscles
Which statement regarding myosin in skeletal muscle is true?
  1. Myosin heads contain two functional sites, one for actin and one for tropomyosin.
  2. Myosin is an ATPase.
  3. The rate of ATP hydrolysis by myosin is the same in all types of skeletal muscle.
  4. Myosin heads contain two functional sites, one for actin and one for tropomyosin; and myosin is an ATPase.
  5. All the choices are true.
Grade 11 Skin, Skeleton, and Muscles
An action potential in the motor end plate rapidly spreads to the central portions of a muscle cell by means of the
  1. Z lines.
  2. sarcoplasmic reticulum.
  3. H zone.
  4. transverse tubules.
  5. pores in the plasma membrane.
Grade 11 Skin, Skeleton, and Muscles
ATP is necessary for several mechanisms or functions in skeletal muscle except
  1. sequestration of Ca2+ into the sarcoplasmic reticulum.
  2. dissociation of actin from myosin.
  3. release of Ca2+ from the sarcoplasmic reticulum.
  4. movement of myosin cross bridges.
  5. maintenance of the polarized state of the skeletal muscle membrane.
Grade 11 Skin, Skeleton, and Muscles
In smooth muscle, calcium triggers contraction by binding to the protein
  1. troponin.
  2. myosin light chain kinase.
  3. myosin light chain.
  4. calmodulin.
  5. DHP receptors.
Grade 11 Anatomical Organization
Ventral refers to the back of the organ or body.
  1. True
  2. False
Grade 11 Respiration, Digestion, and Excretion
Which structure is NOT a part of the pharynx?
  1. nasopharynx
  2. nosepharynx
  3. oropharynx
  4. laryngopharynx
Grade 11 Respiration, Digestion, and Excretion
Where does the trachea divide into two primary bronchi?
  1. carotid
  2. diaphram
  3. carina
  4. Adam's apple
Grade 11 Zoology
The chimera is also known as the
  1. rabbit fish.
  2. dog fish.
  3. blob fish.
  4. skunk fish.
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