All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except
A. it is involved in the storage and release of Ca2+.
B. it is more irregular than that in skeletal muscle fibers.
C. it is in close association with the transverse tubules.
D. it has enlarged terminal cisternae like skeletal muscle fibers.
Answer: D
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A pediatrician tapped the knee of a child. She found that the child's patellar tendon reflex was abnormal. Which body areas might have problems?
A) Muscles, nerves or the spinal cord B) Knees, thighs, or hips C) Tibias, ankles, or feet D) Eyes, ears, or nose
If gametes were diploid like somatic cells, how many chromosomes would the zygote contain?
A) Twice the diploid number, and with every succeeding generation, the chromosome number would continue to double and normal development could not occur. B) Half the diploid number with no change in development. C) Triple the diploid number, and with every succeeding generation, the chromosome number would continue to triple and normal development would not occur. D) There is no relationship between gametes and somatic cells.
The ________________________________________ refill time of a healthy animal should be less than one or two seconds
Fill in the blank(s) with correct word
A __________ is a bird that has left the nest and is feeding on its own
Fill in the blank(s) with correct word