Which of the following best describes the sarcoplasmic reticulum?
A) protein that accounts for elasticity of resting muscle
B) repeating unit of striated myofibrils
C) storage and release site for calcium ions
D) thin filaments are anchored here
E) largely made of myosin molecules
Answer: C
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The pectoral girdle, upper limb bones, pelvic girdle, and lower limb bones make up the
A) appendicular skeleton. B) axial skeleton. C) thoracic cage. D) vertebral column. E) pelvis.
Which organ system supports the body and protects internal organs?
What will be an ideal response?
Systolic blood pressure represents ________
A) the expansion and recoil of the artery walls B) the highest blood pressure generated in arteries during ventricular systole when the artery is maximally stretched C) the resistance to blood flow in the arteries D) the electrical activity in the heart
Which of the following hormones is responsible for the development and maintenance of the secondary sexual characteristics?
a. testosterone b. estrogen c. progesterone d. Both a and b e. All of the above