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.
Explanation:
The top left box- B,
Far left box- A,
Bottom box- it’s either C or E but ai am pretty sure it’s E
The villi of the small intestine use active transport to take up nutrients after concentration has reached equilibrium.
<h3>What is Active transport?</h3>
Active transport may be defined as the process that occurs against the concentration gradient and is mediated by carrier proteins. Metabolic energy is used to move ions or molecules against a concentration gradient.
During the process of digestion, the villi in the small intestine enthrall the soluble nutrients gradually. Over time, the concentration of nutrients in the villi acquires an equilibrium with the concentration in the gut. Until here, the nutrient uptake is carried by the process of passive diffusion.
But after attaining the equilibrium, the nutrient uptake is carried by the process of active transport.
The complete question is as follows:
What part of the body uses active transport to take up nutrients after concentration has reached equilibrium?
- Lungs
- Stomach
- Small intestine
- Liver
Therefore, the correct option for this question is C, i.e. small intestine.
To learn more about Active transport, refer to the link:
brainly.com/question/18434867
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Answer:
Ultimately what makes each cell different despite the fact that they share the same set of DNA is regulation of gene expression, which regulates the expression of genes. In other words, it determines which genes are turned off and which are turned on in a cell. Gene expression can be regulated in many ways; it's mainly centered around molecules like transcription factors that have the ability to turn certain genes on and off and activators, which promote transcription of DNA.
The short answer to this question is cell differentiation. Differential gene expression results from the genes being regulated differently in each cell type, and differential gene expression leads to different cells.
In fact, from the very beginning of our lives, so to speak, when we're developing from a zygote into an embryo, the egg that makes up the zygote in fact already has a sequential program of gene regulation tat is carried out as cells divide, and this program makes the cell become different from each other in a coordinated fashion.
Answer:
3rd
Explanation:
A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.
