The membranous network that wraps around myofibrils and holds relatively high concentrations of calcium is known as the
A. T-tubule.
B. sarcomere.
C. sarcolemma.
D. sarcoplasmic reticulum.
E. Golgi body.
Answer: D
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A person who is often tired and has frequent colds makes a New Year's resolution to eat more foods with molecules that can store energy and protect against infection. Which dietary component will she increase?
A) Proteins B) Carbohydrates C) Fats D) Fiber
Which tissue lines the small intestine and the stomach?
A) simple squamous epithelium B) simple cuboidal epithelium C) simple columnar epithelium D) pseudostratified ciliated columnar epithelium E) stratified squamous epithelium
Answer the following statements true (T) or false (F)
1. Glasses can successfully treat presbyopia. 2. The average man and woman have the same number of birthdays. 3. The prenatal period of life usually starts in the oviduct. 4. The blastocyst has about three times the mass of the zygote. 5. Although the function of the placenta is to act as a barrier between the mother and fetus, substances such as alcohol can cross the barrier.
The ovaries belong to which two systems?
A. Reproductive and excretory B. Reproductive and lymphatic C. Reproductive and endocrine D. Endocrine and excretory