BIOL 1104: Test 2
30 Cards in this Set
Front | Back |
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Which of the following accurately describes how hormones are secreted in the body?
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Hormones are made and secreted by cells and collections of cells (organs) that make up the endocrine system.
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Hormones are carried by endocrine cells from an endocrine gland to a target cell.
T/F
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False
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Hormones in the blood stream travel all over the body, not just to target cells.
T/F
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TRUE
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Which of the following are endocrine glands? Select all that apply.
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Thyroid
Pancreas
Ovaries
Testes
Adrenal
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Some hormone-secreting cells are not organized into organs, but exist individually or in small clusters of cells. T/F
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TRUE
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Which of the following aspects of an analogy about how hormones work would be a problem?
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An analogy in which the hormone receptor and target cell were separate, unconnected parts.
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Fill in the blank with ONE word so that this sentence describes a positive feedback loop:
The presence of a signal leads to a(n)
______
of the same signal.
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increase
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What is a tropic hormone?
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A hormone that stimulates or inhibits the release of other hormones.
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Which of these options best describes a component of hormone function in the human body?
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Hormones can bind to target cells in different parts of the body, causing one or more responses in each target cell
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Which of the following statements about the male reproductive system is false?
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Both the prostate and the bulbourethral glands produced components of the semen.
-->The prostate gland is located in the testes.
Sperm mature in seminiferous tubules in the testes.
The vas deferens carries sperm from the testes to the penis.
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Where are sperm produced?
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Seminiferous tubules
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Which of the following are components of hormonal regulation of male reproduction? Select all that apply.
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Anterior pituitary
Leydig cells
Hypothalamus
Sertoli cells
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Which of the following are components of hormonal regulation of male reproduction? Select all that apply.
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Hypothalamus
Anterior pituitary
Leydig cells
Sertoli cells
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Some of the same hormones regulate male and female reproduction. T/F
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TRUE
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Which hormone causes FSH and LH to be released?
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GnRH
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In a 28-day cycle, on which day does ovulation occur?
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Day 14
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Which hormone can have both a stimulating and an inhibiting effect in the female reproductive cycle?
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Estrogen (aka estradiol)
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Estrogen, progesterone, and testosterone are hormones that control human reproduction after being produced in the brain. T/F
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False
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Where is an egg fertilized (joined with a sperm)?
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In the fallopian tube
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Human females have two reproductive cycles that happen sequentially. The ovarian cycle occurs first and then the menstrual cycle occurs.
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False
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At what point in her reproductive cycle does a women shed her uterine lining (menses)?
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At the beginning of the cycle
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The average female reproductive cycle is 28 days (4-weeks) long, but cycles vary from woman to woman. Which of the following helps to explain why different women may have different cycle lengths?
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Genetic variation
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Which hormones directly stimulate the development of an egg in a woman's ovary? Select all that apply.
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FSH,LH
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A follicle is a hole through which the egg escapes the ovary. T/F
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False
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The difference in effectiveness between "perfect use" of birth control and "typical use" of birth control varies among birth control methods. T/F
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True
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Order these forms of contraception from most (1) to least effective (5) under typical use conditions.
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__5__Withdrawl method
__3__Diaphragm
__1__Itrauterine device
__4__Male condom
__2__Pills
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Which of the following are characteristics researchers hope to achieve in a male contraceptive pill?
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>Males are still able to father healthy offspring after they discontinue use of the drug.
>Prevents all sperm from fertilizing the female egg.
>The effects can be reversed so permanent infertility is not caused.
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Which of the following statements are true? Select all that apply.
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>After the corpus luteum disintegrates, the uterine lining begins to shed.
>The corpus luteum is generated from the follicle that remains after ovulation.
>The corpus luteum is sustained by luteinizing hormone for about 7 days.
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Which of the following statements is false?
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Menstruation occurs just after LH and FSH level peak.
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Which of the following statements about hormone regulation of the female reproductive cycle is false?
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Low levels of progesterone inhibit the release of GnRH.
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