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Question
Drugs called calcium channel blockers may be used to lower blood pressure by causing arteries to vasodilate. How do you suppose these drugs work?
A. They prevent calcium from entering the sarcoplasmic reticulum of smooth muscle.
B. They stimulate the calcium pump in smooth muscle, thus removing calcium from the calmodulin.
C. They prevent calcium from exiting the sarcoplasmic reticulum in skeletal muscle.
D. They prevent calcium from entering cardiac muscle, thus slowing down the heart rate.
E. They prevent calcium from entering smooth muscle, thus allowing the muscle to relax.
Answer
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Related questions
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Which of the following is the most common spinal curvature deformity?
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B. Lordosis
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A. A bone growing within some cartilages in response to pressure
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E. A bone made of dense regular connective tissue
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The average number of bones in the adult skeleton is __________.
A. 56
B. 106
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E. 256
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The mastoid process cannot be palpated on a living person.
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Which of the following muscles adducts and medially rotates the thigh?
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An injury that results in complete functional loss of the ulnar nerve will affect which of the following muscles?
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Which muscle originates at the manubrium, inserts on the thyroid cartilage, and aids in singing low notes?
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Which muscle(s) of respiration is(are) innervated by the phrenic nerve?
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Q:
The ________ originates on the zygomatic arch and inserts on the angle of the mandible.
A. masseter
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Q:
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Q:
With the elbow and wrist extended, painting a circle on a canvas requires __________ of the shoulder.
A. rotation
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Q:
When you hold out your hands with the palms up, __________ your wrists will tip your palms toward you.
A. hyperextending
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Q:
Which of the following is true regarding joints that are first-class levers?
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B. Their mechanical advantage is always less than 1.0.
C. Their output force is always greater than the input force.
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Q:
The triads of a muscle fiber consist of __________.
A. two A bands and one I band
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Q:
Which of the following would be caused by a contraction of smooth muscle?
A. Goose bumps
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Q:
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Q:
An Olympic sprinter readies for a race. After the sound of the starting gun, he propels himself forward from the starting block and immediately grimaces in pain, grabbing for the back of his thigh. Within 48 hours he begins noticing extensive bruising on the back of his thigh extending into the back of the knee. He now has difficulty rising from a seated position and flexing his knee. Bending at the waist generates more pain. Which muscle is likely injured?
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Q:
A male sustains a crushing injury to his foot. After weeks of care, he begins to notice that he cannot bend the little toe on his right foot. Which of he following would be a logical diagnosis? A. Atrophy of the flexor hallucis brevis
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Q:
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