Contraction of skeletal muscle is caused by the release of neurotransmitters from ________ neurons
Fill in the blank(s) with correct word
motor
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The birth of Louise Brown was the first person born as a result of _____
a. in vitro fertilization b. sex selection c. intrauterine insemination d. laparoscopy e. genetically engineering of human-animal hybrids
A homozygous recessive where “A” represents the
trait has two recessive alleles __________. Fill in the blank(s) with the appropriate word(s).
Prior to muscle fiber stimulation
a. the sarcomeres are contracted. b. the myosin heads are in the resting position. c. the myosin heads are activated. d. calcium is sequestered in the sarcoplasmic reticulum. e. all of these occur.
What is a disadvantage of the exoskeleton?
a. It cannot be replaced if damaged. b. It must be shed to accommodate growth. c. It is easily penetrated by predators. d. It requires high ATP levels for continuous growth. e. It does not permit movement of the organism.