Study Guide
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The humerus articulates proximally with the clavicle | False
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| An age-related skeletal disease that is characterized by loss of bone mineral density and increased bone fragility is | Osteoporosis
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| Which of the following is not a characteristic of the diaphysis | Provides a bulbous shape for attachment of muscle
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| One similarity between the structures of the foot and hand is the equivalent degrees of movement of both the thumb and the big toe. | False
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| The cells responsible for active erosion of bone minerals are called | Osteoclasts
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| Which structures are unique to the fetal skull and provide additional space for molding the head shape as the baby passes through the birth canal? | Fontanels
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| Calcification of the organic bone matrix occurs when | Complex calcium salts are deposited in the matrix
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| Which of the following may cause skeletal variations | All of the above may cause skeletal variations (Inadequate supply of calcium and vitamin D, Mechanical stress, Age)
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| During childbirth, a baby passes through an imaginary plane called the | Pelvic outlet
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| Which of the following is not one of the primary functions performed by bones | Hormonal production
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| After the age of 50, the density of bone | Decreases slowly because of a shift in the remodeling activity
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| The humerus articulates proximally with the | Scapula
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| The cell organelles that synthesize organic matrix substances in bone formation are | Endoplasmic reticulum and Golgi apparatus
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| Because of how the clavicle articulates with the scapula, all shoulder movements involve the sternoclavicular joint | True
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| In bone growth, the medullary cavity is enlarged because of the activity of | Osteoclasts
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| An example of a hinge joint is(are) the | Interphalangeal joints
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| Which of the following is not an end-product of the breakdown of ATP | All of the above are end-products of the breakdown of ATP (An inorganic phosphate, Energy that can be used in muscle contraction, ADP)
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| Which of the following proteins found in myofilaments contains the cross-bridges | Myosin
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| The strength of a muscle contraction is influenced by the | All of the above are correct (amount of load, initial length of muscle fibers, recruitment of motor units)
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| The protein molecule that has heads jutting out for cross-bridging is | myosin
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| Most body movements are _____ contractions | Isotonic
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| The rotator cuff muscles and tendons form a cufflike arrangement around the _____ joint | Shoulder
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| Which structure functions to temporarily store calcium ions | Sarcoplasmic reticulum
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| All of the following are characteristics of smooth muscle except | Thin and thick filaments are aligned in sarcomeres like skeletal muscles
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| White fibers are also called _____ fibers | Fast
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| Stretching the foot down and back and pointing the toe is called | Plantar flexion
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| The ability of muscle cells to respond to nerve stimuli is called | Irritability
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| Physiological muscle fatigue may be caused by | All of the above ( a relative lack of ATP, high levels of lactate, failure of the sodium-potassium pumps)
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| Tilting the foot upward, decreasing the angle between the top of the foot and the front of the leg, is called | Dorsiflexion
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| A contraction in which the tension within the muscle remains the same but the length changes is called a(n) _____ contraction | Isotonic
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| Acetylcholine is in the same class of neurotransmitters as | None of the above
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| No impulse can be sent through a neuron | During the absolute refractory period
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| The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are) | Potassium
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| Which is true of an action potential | The outside of the plasma membrane is negatively charged, and the inside is positively charged
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| Which of the following is not used by the body as a neurotransmitter | Peroxide
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| Within the nervous system, coding for the strength of a stimulus is accomplished through | The frequency of nerve impulses
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| Which neuron could transmit a nerve impulse the fastest | A large-diameter neuron with myelin
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| The fastest nerve fibers in the body can conduct impulses up to approximately _____ meters per second | 130
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| A slight shift away from the resting membrane potentials in a specific region of the plasma membrane is called a _____ potential | Local
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| Stimulus-gated channels open in response to | Sensory stimuli
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| A synapse consists of | All of the above ( a synaptic knob, a synaptic knob, the plasma membrane of a postsynaptic neuron)
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| Severe depression can be caused by a deficit in certain brain synapses of | Neuropeptides
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| Which of the following is not one of the main chemical classes of neurotransmitters | Triglycerides
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| Which of the following is true of spatial summation | Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron
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| A synaptic knob would be located on a(n) | Axon
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| A mixed nerve is one that | Carries both sensory and motor fibers
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| The cerebellum performs all of the following functions except | Controls cardiac function
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| If the ventral nerve root of a spinal nerve were destroyed, a person would lose _____ related to that pathway | Willed movement
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| All of the following cranial nerves are involved in proprioception except the | Vagus
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| Audition is a function of the _____ lobe | Temporal
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Created by:
Christina Schneck