In which situation can a child born with a genetic disease have two normal parents?
A. When the disease gene is recessive and the parents are heterozygous
B. When the disease gene is dominant and the parents are heterozygous
C. When the disease gene is either dominant or recessive
D. It is not possible.
Answer: A
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The parasympathetic nervous system:
a. is also called the thoracolumbar system b. is responsible for the “fight or flight” response c. releases acetylcholine from its postganglionic axons d. has neurons that enter the sympathetic chain ganglion
Which of the following is not characteristic of smooth muscle?
A) Smooth muscle connective tissue forms tendons and aponeuroses. B) Neurons that innervate smooth muscles are under involuntary control. C) Smooth muscles are uninucleate. D) Smooth muscles do not contain sarcomeres. E) The thin filaments of smooth muscle fibers are attached to dense bodies.
Antibodies are produced by ____
a. lymphocytes b. monocytes c. basophils d. eosinophils
Peristaltic contractions that propel the contents of the colon toward the distal large intestine are:
A) mass movements. B) haustral contractions. C) defecation. D) segmentation.