Answer the following statements true (T) or false (F)
1. A passive process that allows passage of small inorganic ions and lipid-soluble materials in all cell types is called diffusion.
2. passive process that involves the movement of water (solvent) molecules toward solute concentrations across a membrane is called facilitated diffusion.
3. Organelles that produce most of the ATP required by the cell are called ribosomes.
4. The endoplasmic reticulum is the organelle responsible for the synthesis of organic products and provides for intracellular storage and transport.
5. The smooth endoplasmic reticulum is the organelle that packages secretory products and renews and modifies plasmalemmae.
1. True
2. False
3. False
4. True
5. False
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Explain why an animal cell without centrioles cannot divide.
What will be an ideal response?
The daughter cells that result from meiosis I are
A. haploid and contain single-stranded chromosomes. B. diploid and contain single-stranded chromosomes. C. haploid and contain double-stranded chromosomes. D. diploid and contain double-stranded chromosomes.
Which of the following effects on the body CANNOT be attributed to testosterone?
A. Rapid bone growth B. Increased calcium excretion C. Growth of pubic, axillary, and facial hair D. Hypertrophy of the larynx E. Enlargement of male genitalia
Which of the following is least likely pertaining to an ileal diverticulum (of Merkel)?
A) It occurs near the junction between the jejunum and the ileum. B) It occurs on the antimesenteric border of the ileum. C) It may have a cordlike attachment to the umbilicus. D) If inflamed, it may produce symptoms that mimic those of appendicitis. E) It may be present in both infants and adults.