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Mente-Endocrine Sys

Mrs. Mente

Name________________________________

January 15, 2013

1. Regulation of sexual reproductive cycles of human males is related most directly to the

presence of the hormone

1. estrogen 3. testosterone2. progesterone 4. insulin

2. The ability of certain hormones to attach to a cell is primarily determined by the

1. receptor molecules in the cell membrane 3. amount of DNA in the cell

2. proteins in the cytoplasm of the cell 4. concentration of salts outside the cell

3. The human reproductive system is regulated by1. restriction enzymes 3. complex carbohydrates

2. antigens 4. hormones

4. The accompanying diagram represents two molecules that can interact with each other to cause

a biochemical process to occur in a cell.

Molecules A and B most likely represent

1. a protein and a chromosome 3. a carbohydrate and an amino acid

2. a receptor and a hormone 4. an antibody and a hormone

5. The accompanying diagram represents an interaction between parts of an

organism.

The term chemicals in this diagram represents

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1. starch molecules 3. hormone molecules

2. DNA molecules 4. receptor molecules

6. Which hormone does notdirectly regulate human reproductive cycles?

1. testosterone 3. insulin

2. estrogen 4. progesterone

7. The pancreas produces one hormone that lowers blood sugar level and another that increasesblood sugar level. The interaction of these two hormones most directly helps humans to

1. maintain a balanced internal

environment

3. dispose of wastes formed in other body

organs

2. digest needed substances for other bodyorgans

4. increase the rate of cellularcommunication

8. The reproductive cycle of a human is usually regulated by

1. gametes 3. natural selection

2. hormones 4. immune responses

9. The accompanying graph shows the relative concentrations of certain hormones in the blood

during the human female reproductive cycle.

Which hormone has the lowest concentration on which day?

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1. hormone A on day 4 3. hormone Con day 12

2. hormone B on day 2 4. hormone D on day 20

10. To communicate between cells, many multicellular animals use

1. nerve signals and respiratory gases 3. bones and muscles

2. respiratory gases and hormones 4. nerve signals and hormones