To stimulate muscle contraction, acetylcholine is released from the ________ into the synaptic cleft.
A. sarcoplasmic reticulum
B. synaptic vesicles
C. terminal cisterns
D. sarcolemma
E. junctional folds
Answer: B
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Tropomyosin strands are held in position by which of the following?
A) actin molecules B) myosin molecules C) troponin molecules D) ATP molecules E) calcium ions
Answer the following statements true (T) or false (F)
1. The end product of amylase digestion is glucose. 2. Lactose intolerance is caused by the inability of the pancreas to produce the proper amount of lactase. 3. The most abundant end product of carbohydrate digestion is glucose. 4. Protein digestion begins in the mouth. 5. In the stomach, hydrochloric acid converts pepsin to trypsin.
Which of the following is true regarding mechanics?
A. branch of physics B. analyzes the actions of forces on particles C. both A and B D. none of the above
What part of a spermatozoon contains the nuclear material?
A. Flagellum B. Tail C. Midpiece D. Acrosome cap E. Head