Which of the following features distinguishes cardiac muscle from skeletal muscle?
a. Cardiac muscle contraction is modified by hormones.
b. Cardiac cells lack T tubules.
c. Only cardiac muscle has slow myosin ATPase activity.
d. In skeletal muscle Ca2+ is released from the sarcoplasmic reticulum.
e. Skeletal muscle has thick myosin and thin actin filaments
A
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The postnatal period extends from
A. birth to death. B. the beginning of the fetal period until the beginning of childhood. C. fertilization to birth. D. the fertilized egg until the end of life.
Which muscle is an antagonist to the psoas major?
A. Biceps femoris B. Gluteus medius C. Tensor fasciae latae D. Adductor longus E. Rectus femoris
Carbohydrates, proteins, and lipids are considered ________
A) major nutrients B) minerals C) vitamins D) coenzymes E) minor nutrients
Transverse tubules and sarcoplasmic reticulum are well developed in
A. skeletal muscle fibers. B. cardiac muscle fibers. C. skeletal and cardiac muscle fibers. D. smooth muscle fibers.