Describe cell preparation for classic cytogenetic analysis
What will be an ideal response
1. Viable, nucleated cells are grown in culture.
2. Mitotic inhibitor is added to arrest cells at metaphase.
3. A hypotonic solution is added to lyse RBCs and swell the nucleated cells.
4. The cells are fixed with Carnoy's fixative and placed on a slide.
5. The cells flatten onto the slide as the fixative dries.
6. A protease is added to dehydrate the chromosomes.
7. The chromosomes are stained.
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Which of the following statements regarding the pineal gland or its hormone is NOT true?
a. The pineal gland is found in the cerebrum of the brain. b. The pineal gland secretes melatonin. c. Melatonin regulates the body's circadian rhythm. d. The body's circadian rhythm is its 24-hour clock.
A pacemaker controls the ________
A) heart's rate and rhythm B) heart's valves C) blood flow of the heart D) all of the above
A/An ____________________ is a surgical incision of the eardrum
Fill in the blank(s) with correct word
The phenomenon of fat storage around the waist, most common in men, is known as the ________ pattern of obesity
A) gynoid B) adipose C) android D) subcutaneous