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Fofino [41]
3 years ago
10

Identify the structures and functions of the male and female reproductive systems.

Biology
1 answer:
olga_2 [115]3 years ago
7 0

Answer AND Explanation:

MALES

Testes: they are oval shaped structures that produce the male gametes and sex hormone called testosterone.

Seminiferous tubules: tubules where spermatogenesis occurs.

Vas deferens: are tubules which lead to the epididymis.

Epididymis: is along, coiled tube for storage of sperms. it contraction and relaxation pushes sperms out and allows ejaculation through the urethra.

Accessory glands like the seminal vesicles, cowper's gland and prostate gland produce seminal fluid that provides a nutrient medium for sperms to swim in.

Scrotum: contains the testes outside the body.

FEMALES

Ovary: these are oval-shaped structures that produce female gametes and sex hormones.

Oviduct: these are hollow structures with an expanded funnel-shaped opening which accepts the released ovum and directs it to the fallopian tube. Fertilization takes place in the oviduct  forming zygote.

Uterus: has an inner layer called endometrium which becomes folded and  vascularised to allow implantation. The endometrium nourishes the embryo..

Cervix: is a muscular ring between the uterus and the vagina. It secretes a plug of mucus, which prevents entry of pathogens and air

The vagina is a muscular copulatory canal into which penis enters. Vagina also allows passage of foetus during parturition.

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(I really need this to boost my grade)<br><br> Label the permeable and impermeable rock layers
Papessa [141]

Answer: HI your question is incomplete but i will provide a general answer that can help you

answer : Permeable Rock layers allow the flow of fluid like substances through them, While Impermeable rock layers do not allow the flow of fluid like substance through them.

Explanation:

Permeable rocks are rocks containing pores through Fluid like substances can penetrate through in the rocks. examples of Permeable rocks are ; Sandstones and Chalk

While an Impermeable rock is a rock that does not allow the flow of fluid like substance through it due to the absence of pores in its rock layers . examples of such rock are ; Clay and marble  

Although some permeable rocks might exhibit low level of permeability as well but generally Rock sample with pores are classified as permeable rock layers.

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3 years ago
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Bio tic Factors. An ecosystem is a community of organisms that interact with each other and with the  and biotic factors in their environment. Abiotic factors are chemical and physical factors such as temperature, soil composition, and climate, along with the amount of sunlight, salinity, and pH.

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7 0
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What types of cells are most involved in the cell-mediated response?.
Anon25 [30]

Explanation:

Cell-mediated immunity is primarily driven by mature T cells, macrophages, and the release of cytokines in response to an antigen. T cells involved in cell-mediated immunity rely on antigen-presenting cells that contain membrane-bound MHC class I proteins in order to recognize intracellular target antigens.

7 0
2 years ago
In vertebrates, hormone production by the endocrine system is often controlled, either directly or indirectly, by the nervous sy
den301095 [7]

Answer:

If the question was actually pointing these (thyrotropin-releasing hormone TRH gonadotropin-releasing hormone GnRH antidiuretic hormone ADH thyroid-stimulating hormone (thyrotropin) TSH prolactin PRL follicle-stimulating hormone FSH luteinizing hormone LH) as the phrases, then the answer will be

•Thyrotropin-releasing hormone TRH describes ANTERIOR PITUITARY

•Gonadotropin-releasing hormone GnRH describes the HYPOTHALAMUS

•Antidiuretic hormone ADH describes the POSTERIOR PITUITARY

•Thyroid-stimulating hormone (thyrotropin) TSH describes the ANTERIOR PITUITARY

•Prolactin PRL describes the ANTERIOR PITUITARY

•Follicle-stimulating hormone FSH describes the ANTERIOR PITUITARY

•Luteinizing hormone LH describes the ANTERIOR PITUITARY

Explanation:

but if the phrases were to be this

1. Releases oxytocin

2. Synthesizes and releases PRL

3. Synthesizes and releases TSH

4. Synthesizes some hormones that are released into blood vessels bound for another gland

5. Regulated by hormones released into portal blood vessels

6. Is an extension of the Hypothalmus

7. Synthesizes oxytocin and ADH

8. Integrates nervous and endocrine systems

(...as found from another source),

the answers will be

1. Posterior Pituitary

2. Anterior Pituitary

3. Anterior Pituitary

4. Posterior Pituitary

5. Posterior Pituitary

6. Posterior pituitary

7. Posterior pituitary

8. Hypothalamus

....respectively.

3 0
3 years ago
You've discovered a gain-of-function mutant E. coli strain that makes red colonies on plates containing normal minimal medium; w
Komok [63]

Answer:

The correct answers are options

B. "Sequencing reagents, such as dNTPs, ddNTPs, and DNA polymerase".

C. "A computer to blast the base pair sequence of the bacterial genomic insert against the genome sequence of your E. coli strain".

F. "An E. coli genomic library made from the mutant strain".

I. "A sequencing primer that hybridizes adjacent to the insertion site of the bacterial genomic fragment in the library plasmids, and pointing in the 5'-to-3' direction towards the bacterial genomic DNA insert".

Explanation:

Plasmid library transformation approaches are very useful to characterize novel mutant bacterium strains. In order to perform a characterization study of this kind, several reagents and tools are needed, including:

- "Sequencing reagents, such as dNTPs, ddNTPs, and DNA polymerase". One important part of knowing what makes novel mutant bacterium different is to sequencing its DNA.

- "A computer to blast the base pair sequence of the bacterial genomic insert against the genome sequence of your E. coli strain". BLAST is a useful computer tool that compares and aligns DNA sequences, this allows to detect what are the nucleotides that are unique in the novel mutant bacterium.

- "An E. coli genomic library made from the mutant strain". Once DNA has been sequenced, an genomic library must be constructed to ensure that this novel mutant is preserved.

- "A sequencing primer that hybridizes adjacent to the insertion site of the bacterial genomic fragment in the library plasmids, and pointing in the 5'-to-3' direction towards the bacterial genomic DNA insert". Sequencing primers are needed when new genomic libraries are constructed. This short DNA sequences allow DNA polymerase to synthesize the DNA an replicate the genome of interest.

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3 years ago
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