What is NOT an effect of parathyroid hormone (PTH)?
A) increased osteoblast activity
B) increased reabsorption of calcium ions from fluid in the kidneys
C) increased release of calcium ions from bone
D) increased absorption of calcium ions by the small intestine
Answer: A
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When you spin quickly, you may feel dizzy. Which component of the inner ear generates the sensations that can lead to this feeling?
A) spiral organ B) maculae C) otoliths D) semicircular canals E) ossicles
Explain how Ca2+ levels inside myocardial cells are altered.
What will be an ideal response?
An 18-year-old boy is brought to the ER after suffering a gunshot wound to his back. Radiographic imaging reveals extensive damage to the neural arches of the L1 and L2 vertebrae, with bone and bullet fragments lodged in the vertebral canal at these levels. Comprehensive neurologic examination indicates destruction of the sacral segments of the spinal cord. Which of the following functional outcomes is most likely present?
(A) Reduced sweat gland secretion in the abdominal wall (B) Decreased motility in the duodenum (C) Increased motility in the ileum (D) Paralysis of the psoas major muscle (E) Relaxation of the teniae coli in the descending colon
The infraorbital foramen is located in which bone?
A. Maxilla B. Mandible C. Zygomatic D. Frontal E. Nasal