Cell Biology Answers

Perchlorate is a synthetic organic component of rocket fuel that contaminates much of our milk and produce, according to government test data. When perchlorate gets into your body it mimics iodine, which the thyroid gland needs to produce thyroxine. Thus, perchlorate is classified as a(n) __________.

receptor activator
enzyme
antibiotic
endocrine disruptor

Which of the following is an accurate statement about the regulation of carbohydrate metabolism in humans?

Insulin reduces the blood glucose level, and glucagon increases it.
Glucagon decreases blood glucose, and insulin increases it.
Parathyroid hormone increases the blood glucose level, and calcitonin decreases it.
FSH increases blood glucose, and LH decreases blood glucose.

What hormone, when injected into virgin female rats, causes them to exhibit maternal behaviors, such as building a nest?

thyroxine
oxytocin
insulin
adrenocorticotropic hormone

The anterior pituitary produces several hormones that regulate hormone production in other endocrine glands. One is luteinizing hormone. What role does this hormone play in males?


it causes the thyroid gland to release its hormones
it stimulates the production of testosterone
it stimulates the production of prolactin
it stimulates the release of antidiuretic hormone

After fertilization the embryo implants in the endometrium and begins secreting a hormone called chorionic gonadotropin (CG), which can be detected in the mother's blood and urine shortly after implantation. CG functions to prevent the corpus luteum from degenerating so that it may continue to produce estrogen and progesterone, which is essential to the maintenance of pregnancy. Using this information, suggest a way we could determine, without invasive methods and without visiting the doctor, whether someone is pregnant or not.

choose one:

Look for a means to determine presence or absence of the corpus luteum.

Develop a test to detect CG in the mother's urine.

Develop a test to detect CG in the blood.

Use ultrasound to determine implantation of the egg.

Given your understanding of oogenesis and the hormonal control of the menstrual cycle, how does a combination birth control pill (containing estrogen and progesterone prevent pregnancy?

Choose one answer:

The pill encourages degeneration of the corpus luteum.

The pill stimulates the release of FSH and LH, initiating the formation of a new set of follicles

The pill prevents follicular development by inhibiting the release of GnRH, FSH, and LH.


The pill promotes development of the follicle and the primary oocyte within

A segment of viral DNA entered a new bacterial host cell. Along with its genome, some bacterial genes were attached to the segment of DNA. Which process most likely occurred prior to the viral DNA entering the new host cell?

A.conjugation

B. generalized transduction

C. mutation

D. specialized transduction

What has happened to the cell placed in hypertonic & hypertonic solution?

After fertilization the embryo implants in the endometrium and begins secreting a hormone called chorionic gonadotropin (CG), e aner implantation. CG functions to prevent the corpus luteum from degenerating so that it may continue to produce estro way we could determine, without invasive methods and without visiting the doctor w pregacy Using this information, whether someone is pregnant or not?

Choices are:

Look for a means to determine presence or absence of the corpus luteum.

Use ultrasound to determine implantation of the egg.

Develop a test to detect CG in the blood.

Develop a test to detect CG in the mother's urine

Which of the following statements accurate?

FSH and LH stimulation of estrogen production follicles is an example of negative feedback.

Hormone levels produced during the menstrual cycle are under the influence of both positive and negative feedback machanisms.

The corpus luteum will degenerate in the absence of FSH

Estrogen and progesterone inhibition of the release of GnRH, FSH, and LH is an example of a positive feedback mechanism.